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Plasmon Induced Heat Funneling from Au to Cu in the Bimetallic Au@Cu Core-Shell Nanoparticles
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作者 Danli Shi Jingyi Yang +5 位作者 Minjie Li Jianchang Lv Xi Liu Ao Liu Shaoshi Guo Yan Wan 《Chinese Journal of Chemical Physics》 SCIE EI CAS CSCD 2024年第4期522-530,I0061-I0066,I0094,共16页
The bimetallic nanostructures that mix a plasmonic metal with a transition metal in the form of the core-shell nanoparticles are promising to promote catalytic performance.But it is still unclear how the heat(hot elec... The bimetallic nanostructures that mix a plasmonic metal with a transition metal in the form of the core-shell nanoparticles are promising to promote catalytic performance.But it is still unclear how the heat(hot electrons and phonons)transfers on the interface between two metals.We have designed and synthesized Au@Cu bimetallic nanoparticles with Au as core and Cu as shell.By using transient absorption spectroscopy,we find that there are two plasmon induced heat funneling processes from Au core to Cu shell.One is the electron temperature equilibrium(electron heat transfer)with equilibration time of~560 fs.The other is the lattice temperature equilibrium(lattice heat transfer)with equilibration time of~13 ps.This plasmon induced heat funneling may be universal in similar bimetallic nanostructures,so our finding could contribute to further understanding the catalytic mechanism of bimetallic plasmonic photothermal catalysis. 展开更多
关键词 PLASMON Transient absorption bimetallic nanoparticle
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Self-derivation and reconstruction of silver nanoparticle reinforced cobalt-nickel bimetallic hydroxides through interface engineering for overall water splitting
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作者 Yan Li Jie Han +5 位作者 Weiwei Bao Junjun Zhang Taotao Ai Mameng Yang Chunming Yang Pengfei Zhang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2024年第3期590-599,I0013,共11页
Designing efficient and long-lasting non-metal electrocatalysts is an urgent task for addressing the issue of kinetic hysteresis in electrochemical oxidation reactions.The bimetallic hydroxides,catalyzing the oxygen e... Designing efficient and long-lasting non-metal electrocatalysts is an urgent task for addressing the issue of kinetic hysteresis in electrochemical oxidation reactions.The bimetallic hydroxides,catalyzing the oxygen evolution reaction(OER),have significant research potential because hydroxide reconstruction to generate an active phase is a remarkable advantage.Herein,the complete reconstruction of ultrathin CoNi(OH)_(2) nanosheets was achieved by embedding Ag nanoparticles into the hydroxide to induce a spontaneous redox reaction(SRR),forming heterojunction Ag@CoNi(OH)_(2) for bifunctional hydrolysis.Theoretical calculations and in situ Raman and ex situ characterizations revealed that the inductive effect of the Ag cation redistributed the charge to promote phase transformation to highly activate Ag-modified hydroxides.The Co-Ni dual sites in Co/NiOOH serve as novel active sites for optimizing the intermediates,thereby weakening the barrier formed by OOH^*.Ag@CoNi(OH)_(2) required a potential of 1.55 V to drive water splitting at a current density of 10 mA cm^(-2),with nearly 98.6% Faraday efficiency.Through ion induction and triggering of electron regulation in the OER via the synergistic action of the heterogeneous interface and surface reconstruction,this strategic design can overcome the limited capacity of bimetallic hydroxides and bridge the gap between the basic theory and industrialization of water decomposition. 展开更多
关键词 Surface reconstruction bimetallic hydroxides Ag nanoparticle Operando Raman Overall water splitting
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RuRh Bimetallic Nanoparticles Stabilized by 15-membered Macrocycles-terminated Poly(propylene imine) Dendrimer:Preparation and Catalytic Hydrogenation of Nitrile–Butadiene Rubber 被引量:3
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作者 Yang Wang Xiaohong Peng 《Nano-Micro Letters》 SCIE EI CAS 2014年第1期55-67,共13页
A new fourth-generation poly(propylene imine) dendrimer(G4-M) containing 32 triolefinic 15-membered macrocycles on the surfaces has been synthesized. The bimetallic Ru Rh dendrimer-stabilized nanoparticles(DSNs) were ... A new fourth-generation poly(propylene imine) dendrimer(G4-M) containing 32 triolefinic 15-membered macrocycles on the surfaces has been synthesized. The bimetallic Ru Rh dendrimer-stabilized nanoparticles(DSNs) were first prepared within G4-M by a co-complexation route. The new G4-M dendrimer has been characterized by 1H nuclear magnetic resonance, infrared radiation, and elemental analysis.The dendrimer-stabilized bimetallic ions and reduction courses were analyzed by UV-vis spectroscopy. Highresolution transmission electron microscopy and energy dispersive spectrometer were used to characterize the bimetallic nanoparticle size, size distribution, and particle morphology. The Ru Rh bimetallic DSNs showed high catalytic activity for the hydrogenation of nitrile-butadiene rubber. 展开更多
关键词 G4-M dendrimer RuRh bimetallic nanoparticles Catalytic hydrogenation Nitrile-butadiene rubber
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Selective suppression of toluene formation in solvent-free benzyl alcohol oxidation using supported Pd-Ni bimetallic nanoparticles 被引量:8
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作者 Jianwei Che Mengjia Hao +4 位作者 Wuzhong Yi Hisayoshi Kobayashi Yuheng Zhou Liping Xiao Jie Fan 《Chinese Journal of Catalysis》 CSCD 北大核心 2017年第11期1870-1879,共10页
The solvent‐free oxidation of benzyl alcohol was studied using supported Pd‐Ni bimetallic nanoparticles.Compared with monometallic Pd,the addition of Ni to Pd was found to be effective in suppressing the nondesired ... The solvent‐free oxidation of benzyl alcohol was studied using supported Pd‐Ni bimetallic nanoparticles.Compared with monometallic Pd,the addition of Ni to Pd was found to be effective in suppressing the nondesired product toluene,thereby enhancing the selectivity towards benzaldehyde.This result was attributed to a dual effect of Ni addition:the weakening of dissociative adsorption of benzyl alcohol and the promotion of oxygen species involved in the oxidation pathway. 展开更多
关键词 Palladium‐nickel bimetallic nanoparticle Benzyl alcohol TOLUENE Solvent‐free Oxidation
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Recovery of high-purity Pt from Pt-Au bimetallic nanoparticles using organic aqua regia 被引量:1
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作者 LIN Wei School of Materials Science & Engineering,Georgia Institute of Technology,Atlanta,Georgia,30332,USA 《Rare Metals》 SCIE EI CAS CSCD 2012年第1期92-95,共4页
Using organic aqua regia,a recently discovered powerful organic leaching agent,an effective process of recovering Pt directly from Pt-Au bimetallic nanoparticles was demonstrated.The purities of the Pt recovered from ... Using organic aqua regia,a recently discovered powerful organic leaching agent,an effective process of recovering Pt directly from Pt-Au bimetallic nanoparticles was demonstrated.The purities of the Pt recovered from a mixture of Au and Pt nanoparticles and from Pt-Au core-shell nanoparticle catalyst are as high as (99.49±0.22)%,and (95.02±0.08)%,respectively.The novel recovery process promises applications in catalysis industry. 展开更多
关键词 organic aqua regia bimetallic platinum gold nanoparticle RECOVERY
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Metal–Oleate Complex?Derived Bimetallic Oxides Nanoparticles Encapsulated in 3D Graphene Networks as Anodes for Efficient Lithium Storage with Pseudocapacitance 被引量:1
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作者 Yingying Cao Kaiming Geng +6 位作者 Hongbo Geng Huixiang Ang Jie Pei Yayuan Liu Xueqin Cao Junwei Zheng Hongwei Gu 《Nano-Micro Letters》 SCIE EI CAS CSCD 2019年第1期250-263,共14页
In this manuscript, we have demonstrated the delicate design and synthesis of bimetallic oxides nanoparticles derived from metal–oleate complex embedded in 3D graphene networks(MnO/CoMn_2O_4  GN), as an anode mater... In this manuscript, we have demonstrated the delicate design and synthesis of bimetallic oxides nanoparticles derived from metal–oleate complex embedded in 3D graphene networks(MnO/CoMn_2O_4  GN), as an anode material for lithium ion batteries. The novel synthesis of the MnO/CoMn_2O_4  GN consists of thermal decomposition of metal–oleate complex containing cobalt and manganese metals and oleate ligand, forming bimetallic oxides nanoparticles, followed by a selfassembly route with reduced graphene oxides. The MnO/CoMn_2O_4  GN composite, with a unique architecture of bimetallic oxides nanoparticles encapsulated in 3D graphene networks, rationally integrates several benefits including shortening the di usion path of Li^+ ions, improving electrical conductivity and mitigating volume variation during cycling. Studies show that the electrochemical reaction processes of MnO/Co Mn_2O_4  GN electrodes are dominated by the pseudocapacitive behavior, leading to fast Li^+ charge/discharge reactions. As a result, the MnO/CoMn_2O_4  GN manifests high initial specific capacity, stable cycling performance, and excellent rate capability. 展开更多
关键词 Metal–oleate complex bimetallic oxides nanoparticles Porous architecture 3D GRAPHENE NETWORKS Lithium ion batteries
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Structural optimization of Au–Pd bimetallic nanoparticles with improved particle swarm optimization method 被引量:1
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作者 邵桂芳 朱梦 +4 位作者 上官亚力 李文然 张灿 王玮玮 李玲 《Chinese Physics B》 SCIE EI CAS CSCD 2017年第6期131-139,共9页
Due to the dependence of the chemical and physical properties of the bimetallic nanoparticles(NPs) on their structures,a fundamental understanding of their structural characteristics is crucial for their syntheses a... Due to the dependence of the chemical and physical properties of the bimetallic nanoparticles(NPs) on their structures,a fundamental understanding of their structural characteristics is crucial for their syntheses and wide applications. In this article, a systematical atomic-level investigation of Au–Pd bimetallic NPs is conducted by using the improved particle swarm optimization(IPSO) with quantum correction Sutton–Chen potentials(Q-SC) at different Au/Pd ratios and different sizes. In the IPSO, the simulated annealing is introduced into the classical particle swarm optimization(PSO) to improve the effectiveness and reliability. In addition, the influences of initial structure, particle size and composition on structural stability and structural features are also studied. The simulation results reveal that the initial structures have little effects on the stable structures, but influence the converging rate greatly, and the convergence rate of the mixing initial structure is clearly faster than those of the core-shell and phase structures. We find that the Au–Pd NPs prefer the structures with Au-rich in the outer layers while Pd-rich in the inner ones. Especially, when the Au/Pd ratio is 6:4, the structure of the nanoparticle(NP) presents a standardized Pd(core) Au(shell) structure. 展开更多
关键词 bimetallic nanoparticles stable structures particle swarm optimization (PSO) simulated annealing
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Kinetics of 2,4-dichlorophenol dechlorination by Pd-Fe bimetallic nanoparticles in the presence of humic acid 被引量:1
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作者 Zhen ZHANG Jing-jing WO +1 位作者 Naman CISSOKO Xin-hua XU 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2008年第1期118-124,共7页
The remediation of groundwater which contains chlorinated organic compounds (COCs) by nanoscale bimetallic catalysts has received increasing interest in recent years. This report presents the dechlorination of 2,4-dic... The remediation of groundwater which contains chlorinated organic compounds (COCs) by nanoscale bimetallic catalysts has received increasing interest in recent years. This report presents the dechlorination of 2,4-dichlorophenol (2,4-DCP) by Pd-Fe bimetallic nanoparticles in the presence of humic acid (HA) to investigate the feasibility of using Pd-Fe for the in situ remediation of contaminated groundwater. Our experimental results indicated that HA had an adverse effect on the dechlorination of 2,4-DCP by Pd-Fe nanoparticles. The rate constant k values of 2,4-DCP dechlorination were 0.017, 0.013, 0.009, 0.006 and 0.004 min?1 for HA concentrations of 0, 5, 10, 15 and 20 mg/L, respectively. The relationship between HA dosage and k values can be described as a linear model. 展开更多
关键词 2 4-dichlorophenol (2 4-DCP) DECHLORINATION Pd-Fe bimetallic nanoparticles Humic acid (HA)
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Lewis acid-driven reaction pathways in synergistic cooperative catalysis over gold/palladium bimetallic nanoparticles for hydrogen autotransfer reaction between amide and alcohol
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作者 Hiroyuki Miyamura Satoshi Isshiki +1 位作者 Hyemin Min Shu Kobayashi 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2016年第10期1662-1668,共7页
Metal nanoparticle catalysts, especially gold and its bimetallic nanoparticle catalysts, have been widely used in organic transformations as powerful and green catalysts. The concept of employing two distinct catalyst... Metal nanoparticle catalysts, especially gold and its bimetallic nanoparticle catalysts, have been widely used in organic transformations as powerful and green catalysts. The concept of employing two distinct catalysts in one reaction system, such as in cooperative and synergistic catalysis, is a powerful strategy in homogeneous catalysis. However, the adaption of such a strategy to metal nanoparticle catalysis is still under development. Recently, we have found that cooperative catalytic systems of gold/palladium bimetallic nanoparticles and Lewis acid can be used for the N‐alkylation of primary amides through hydrogen autotransfer reaction between amide and alcohol. Herein, the results of a detailed investigation into the effects of Lewis acids on this hydrogen autotransfer reac‐tion are reported. It was found that the choice of Lewis acid affected not only the reaction pathway leading to the desired product, but also other reaction pathways that produced several intermedi‐ates and by‐products. Weak Lewis acids, such as alkaline‐earth metal triflates, were found to be optimal for the desired N‐alkylation of amides. 展开更多
关键词 Gold PALLADIUM bimetallic nanoparticle Lewis acid Amide synthesis Hydrogen autotransfer
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Synthesis and Enhanced Electrochemical Activity of Ag-Pt Bimetallic Nanoparticles Decorated MWCNTs/PANI Nanocomposites
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作者 ZHANG Ranran QIAN Jun +2 位作者 YE Shuangli ZHOU Yihua ZHU Ziqiang 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2018年第5期1281-1287,共7页
Ag-Pt bimetallic nanoparticles decorated on MWCNTs/PANI nanocomposites have been synthesized by in-situ chemical oxidative polymerization and chemical co-reduction method. The Fourier transform infrared(FT-IR) spect... Ag-Pt bimetallic nanoparticles decorated on MWCNTs/PANI nanocomposites have been synthesized by in-situ chemical oxidative polymerization and chemical co-reduction method. The Fourier transform infrared(FT-IR) spectroscopy, X-ray diffraction(XRD), ultraviolet-visible(UV-vis) absorption spectroscopy, scanning electron microscopy(SEM) and transmission electron microscopy(TEM) were used to characterize the morphology and structure of the nanocomposites. It can be observed that the PANI was uniformly grown along the MWCNTs to form MWCNsT/PANI fiber-like nanocomposites with diameter about 60 nm, and the Ag-Pt binary nanoparticles were decorated onto MWCNTs/PANI with particle sizes around 6.8 nm. Cyclic voltammetry(CV) and electrochemical impedance spectroscopy(EIS) were used to characterize the electrochemical performance of the prepared electrode. The results demonstrated that the obtained MWCNTs/PANI/Ag-Pt electrode displayed a good electrochemical activity and fast electron transport, which has potential applications in biosensors and supercapacitors. 展开更多
关键词 Ag-Pt bimetallic nanoparticles polyaniline multiwalled carbon nanotubes electrochemical properties
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Nanolarvicidal Effect of Green Synthesized Ag-Co Bimetallic Nanoparticles on <i>Culex quinquefasciatus</i>Mosquito
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作者 Wilson Lamayi Danbature Zaccheus Shehu +1 位作者 Mela Yoro Muhammad Mustapha Adam 《Advances in Biological Chemistry》 2020年第1期16-23,共8页
Synthesis of bimetallic nanoparticles has employed many applications especially as larvicidal agents, these bimetallic nanoparticles therefore need to be produced via a cost-effective and eco-friendly route. Here, gre... Synthesis of bimetallic nanoparticles has employed many applications especially as larvicidal agents, these bimetallic nanoparticles therefore need to be produced via a cost-effective and eco-friendly route. Here, green synthesis of Ag-Co hybrid nanoparticles obtained from aqueous root extract of palmyra palm was reported. The hybrid nanoparticles formation was noticed by a colour change from light pink to light brown and further studied using UV-Vis and FT-IR spectrophotometers. The maximum absorption wavelength, λmax as determined by the UV-Visible Spectrophotometer was found to be 420 nm. The FT-IR showed the formation and stabilization of the BMNPs. The nanolarvicidal potency was evaluated by the application of varying concentration ranging from 5 to 50 mg/L against first to fourth instars of larvae and recording the percentage mortality after 24 hours. Probit analysis showed the LC50 and LC90 for 1st instar to be 5.237 mg/L and 49.240 mg/L, 9.310 mg/L and 94.969 mg/L for 2nd instar, 13.626 mg/L and 105.542 mg/L for 3rd/4th instars respectively. This result therefore suggests that the nanoparticles can be used as potential control for larval population growth. 展开更多
关键词 Nanolarvicide Green Synthesis Ag-Co bimetallic nanoparticles CULEX quinquefasciatus MOSQUITO
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Synthesis and Characterization of Bimetallic Gold-Silver Core-Shell Nanoparticles: A Green Approach
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作者 A. Calagua H. Alarcon +1 位作者 F. Paraguay Juan Rodriguez 《Advances in Nanoparticles》 2015年第4期116-121,共6页
Bimetallic gold-silver core-shell nanoparticles were prepared by chemical reduction in aqueous solution, following a method that was friendly to the environment, allowing us to use this for medicinal purposes. Gold na... Bimetallic gold-silver core-shell nanoparticles were prepared by chemical reduction in aqueous solution, following a method that was friendly to the environment, allowing us to use this for medicinal purposes. Gold nanoparticles were synthesized, and silver cations were then reduced on the nanoparticles. Using the optical properties of metallic nanoparticles, surface plasmon resonance was determined by UV-Vis spectroscopy, and the values obtained for gold and silver were approximately 520 nm and 400 nm in wavelength, respectively. The absorption peaks of the surface plasmon band show a clear red-shift due to size effect in the case of the silver surface, and a plasmon coupling effect, in the case of gold. To obtain a better understanding of the coating conditions, high resolution transmission electron microscopy was used. The average hydrodynamic size and the size distribution of the synthesized nanoparticles were obtained by dynamic light scattering. The development of this process, which is benign for the environment, opens the possibility for many applications in the areas of renewable energy, medicine and biology. 展开更多
关键词 nanoparticles bimetallic CORE-SHELL GOLD SILVER Au/Ag
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Interaction between Pd and Cu nanoparticles in bimetallic CuPdx nanoparticles and its impact on oxidation of 1,2-propanediol to aliphatic acids
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作者 Wei Tao Aili Wang Hengbo Yin 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2020年第4期1085-1094,共10页
Bimetallic CuPdx nanoparticles synthesized by the wet chemical reduction method were used as the catalysts in the catalytic oxidation of 1,2-propanediol with gaseous oxygen to aliphatic acids.The palladium and copper ... Bimetallic CuPdx nanoparticles synthesized by the wet chemical reduction method were used as the catalysts in the catalytic oxidation of 1,2-propanediol with gaseous oxygen to aliphatic acids.The palladium and copper nanoparticles in the bimetallic CuP dxnanoparticles had an alloying trend.The catalytic activity of the palladium nanoparticles in the bimetallic CuP dxnanoparticles was enhanced by the interaction between the palladium and copper nanoparticles.When the bimetallic CuPd7 nanoparticles catalyzed the oxidation of 1,2-propanediol in an alkaline aqueous solution at 100℃for 3h,lactic,formic,and acetic acids were dominantly produced with the total selectivity of above 99%at the 1,2-propanediol conversion of 85.9%.The simulation of the reaction kinetic equation on the CuPd7 catalyst showed that the reaction activation energy was 29.4kJ·mol^-1,indicating that the bimetallic CuPd7 nanoparticles had a high catalytic activity in the oxidation reaction between 1,2-propanediol and gaseous oxygen. 展开更多
关键词 bimetallic CuPdx nanoparticles 1 2-PROPANEDIOL Aliphatic acids
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Determination of Hydrodynamic Parameters of Chitosan Stabilized Bimetallic Nanoparticles
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作者 Vokhidova N.R. Rashidova S.Sh. 《Journal of Metallic Material Research》 2022年第1期32-37,共6页
The hydrodynamic characteristics of bimetallic Ag/Cu and Co/Ag nanopar­ticles stabilized by chitosan were determined.The polydispersity index and the diameter of nanoparticles were observed to decrease in contras... The hydrodynamic characteristics of bimetallic Ag/Cu and Co/Ag nanopar­ticles stabilized by chitosan were determined.The polydispersity index and the diameter of nanoparticles were observed to decrease in contrast to the original polymer during the creation of chitosan stabilized bimetallic nanoparticles,decreasing from 0.342 to 0.12±0.04 and 2.5 micron to 180 nm,respectively.However,the diffusion coefficient of chitosan was in­creased from 0.2 cm^(2)/s to 2.71 cm2/s during the production of stable bime­tallic nanoparticles.The lack of absorption bands at 500 nm and 700 nm-900 nm in the UV spectra of the samples suggests that in the presence of a reducing agent,copper(II)and cobalt(II)ions undergo full reduction.The relationship between the synthesis conditions and the kind of structure of bimetallic nanoparticles“core-shell”has been discovered.Silver atoms have been shown to be both a core and a shell,depending on the synthesis conditions and chemical nature of metal ions. 展开更多
关键词 Chitosan Bombyx mori bimetallic nanoparticles Index polydispersity Diffusion coefficient
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Bimetallic nanoparticles as cascade sensitizing amplifiers for low-dose and robust cancer radio-immunotherapy
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作者 Yupeng Wang Lina Wang +3 位作者 Tao Li Min Ouyang Hejian Xiong Dongfang Zhou 《Acta Pharmaceutica Sinica B》 SCIE CAS CSCD 2024年第4期1787-1800,共14页
Radiotherapy(RT)is one of the most feasible and routinely used therapeutic modalities for treating malignant tumors.In particular,immune responses triggered by RT,known as radio-immunotherapy,can partially inhibit the... Radiotherapy(RT)is one of the most feasible and routinely used therapeutic modalities for treating malignant tumors.In particular,immune responses triggered by RT,known as radio-immunotherapy,can partially inhibit the growth of distantly spreading tumors and recurrent tumors.How-ever,the safety and efficacy of radio-immunotherapy is impeded by the radio-resistance and poor immu-nogenicity of tumor.Herein,we report oxaliplatin(IV)-iron bimetallic nanoparticles(OXA/Fe NPs)as cascade sensitizing amplifiers for low-dose and robust radio-immunotherapy.The OXA/Fe NPs exhibit tumor-specific accumulation and activation of OXA(I)and Fe^(2+)in response to the reductive and acidic microenvironment within tumor cells.The cascade reactions of the released metallic drugs can sensitize RT by inducing DNA damage,increasing ROS and O_(2) levels,and amplifying the immunogenic cell death(ICD)effect after RT to facilitate potent immune activation.As a result,OXA/Fe NPs-based low-dose RT triggered a robust immune response and inhibited the distant and metastatic tumors effectively by a strong abscopal effect.Moreover,a long-term immunological memory effect to protect mice from tumor rechal-lenging is observed.Overall,the bimetallic NPs-based cascade sensitizing amplifier system offers an effi-cient radio-immunotherapy regimen that addresses the key challenges. 展开更多
关键词 bimetallic nanoparticles Radio-immunotherapy Cascade sensitizing amplifier Oxaliplatin Fenton-typeHaber-Weiss reaction RADIOSENSITIZATION Immunogenic cell death Radio-resistance
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Development of Cd-doped Co Nanoparticles Encapsulated in Graphite Shell as Novel Electrode Material for the Capacitive Deionization Technology 被引量:3
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作者 Nasser A.M.Barakat Khalil Abdelrazek Khalil +1 位作者 Ahmad G.El-Deen Hak yong kim 《Nano-Micro Letters》 SCIE EI CAS 2013年第4期303-313,共11页
Because of the low energy requirement and the environmentally safe byproducts, the capacitive deionization water desalination technology has attracted the attention of many researchers. The important requirements for ... Because of the low energy requirement and the environmentally safe byproducts, the capacitive deionization water desalination technology has attracted the attention of many researchers. The important requirements for electrode materials are good electrical conductivity, high surface area, good chemical stability and high specific capacitance. In this study, metallic nanoparticles that are encapsulated in a graphite shell(Cd doped Co/C NPs) are introduced as the new electrode material for the capacitive deionization process because they have higher specific capacitance than the pristine carbonaceous materials. Cd doped Co/C NPs perform better than graphene and the activated carbon. The introduced nanoparticles were synthesized using a simple sol gel technique. A typical sol gel composed of cadmium acetate, cobalt acetate and poly(vinyl alcohol)was prepared based on the polycondensation property of the acetates. The physiochemical characterizations that were used confirmed that the drying, grinding and calcination in an Ar atmosphere of the prepared gel produced the Cd doped Co nanoparticles, which were encapsulated in a thin graphite layer. Overall, the present study suggests a new method to effectively use the encapsulated bimetallic nanostructures in the capacitive deionization technology. 展开更多
关键词 Capacitive deionization Water desalination bimetallic nanoparticles Specific capacitance
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Preparation,characterization and catalytic behavior of Pt-Cu nanoparticles in methane combustion 被引量:3
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作者 Florica Papa Catalin Negrila +2 位作者 Gianina Dobrescu Akane Miyazaki Ioan Balint 《Journal of Natural Gas Chemistry》 EI CAS CSCD 2011年第5期537-542,共6页
Fine and well dispersed Pt-Cu bimetallic nanoparticles stabilized by polyvinyl pyrrolidone (PVP) were synthesized by alkaline polyol method. The molar ratio of Pt to Cu was 1 : 1. Further, the Pt-Cu bimetallic nano... Fine and well dispersed Pt-Cu bimetallic nanoparticles stabilized by polyvinyl pyrrolidone (PVP) were synthesized by alkaline polyol method. The molar ratio of Pt to Cu was 1 : 1. Further, the Pt-Cu bimetallic nanoparticles were supported on alumina and their catalytic behavior in methane combustion was investigated. The as-prepared as well as the supported Pt-Cu nanoparticles were characterized by transmission elec- tron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), fractal analysis and X-ray diffraction (XRD). The dependence of methane combustion on the morphology and surface composition of Pt-Cu nanoparticles was analyzed based on the experimental results. 展开更多
关键词 Pt-Cu bimetallic catalyst methane combustion polyol method Pt-Cu nanoparticle
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Reverse Microemulsion Synthesis and Characterization of Pd-Ag Bimetallic Alloy Catalysts Supported on Al_2O_3 for Acetylene Hydrogenation 被引量:4
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作者 Wei Guobin Dai Wei +2 位作者 Li Qian Cao Weiliang Zhang Jingchang 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2012年第3期59-67,共9页
Pd-Ag bimetallic alloy nanoparticles were synthesized by the reverse microemulsion method, and then deposited on A1203 to form the supported catalyst. The nanoparticles of Pd-Ag and Pd-Ag/AI203 samples were characteri... Pd-Ag bimetallic alloy nanoparticles were synthesized by the reverse microemulsion method, and then deposited on A1203 to form the supported catalyst. The nanoparticles of Pd-Ag and Pd-Ag/AI203 samples were characterized by UV/ Vis, HRTEM, EDX, XRD, and XPS. The test results indicated that Pd-Ag bimetallic alloy nanoparticles with a size of about 2 nm and a face-centered cubic (fcc) structure were formed in the measured area of microemulsion. The growth of nanopar- ticles was effectively limited within the droplet of micoremulsion. TEM image exhibited that the Pd-Ag alloy nanoparticles were well-dispersed on the A1203 support. The catalytic performance of various catalysts for selective hydrogenation of acetylene showed that a higher acetylene conversion and selectivity to ethylene upon acetylene hydrogenation was achieved on a nano-sized Pd-Ag bimetallic catalyst with a Pd/Ag alloy supported molar ratio of 1:1.5. 展开更多
关键词 reverse microemulsion Pd-Ag bimetallic catalyst nanoparticlE acetylene hydrogenation
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Synthesis of Core-Shell Nanoparticles of Cu-Ag for Application in Electrohydrodynamic Printing Technique 被引量:1
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作者 Chinh Dung Trinh Dung My Thi Dang Chien Mau Dang 《材料科学与工程(中英文A版)》 2019年第2期75-82,共8页
Core-shell nanoparticles of Cu-Ag (Cu core and Ag shell) were synthesized using chemical method. Polyvinyl pyrrolidone (PVP) was used as a surfactant, and ascorbic acid (C6H8O6) and sodium borohydride (NaBH4) were use... Core-shell nanoparticles of Cu-Ag (Cu core and Ag shell) were synthesized using chemical method. Polyvinyl pyrrolidone (PVP) was used as a surfactant, and ascorbic acid (C6H8O6) and sodium borohydride (NaBH4) were used as reducing agents to reduce the metal complexes [Cu(NH3)4]^2+ and [Ag(NH3)2]^+. The results of transmission electron microscope (TEM) analysis, ultraviolet-visible spectroscopic (UV-Vis) analysis, X-ray diffraction (XRD) analysis showed that the core-shell nanoparticles of Cu-Ag were successfully synthersized. The average particle size was 32 nm. The dispersion of the nanoparticles was still good after 80 days without the formation of the oxides of Cu and Ag. The properties of the nanoparticles suggested that they were suitable to be used as an electrically conductive material for conductive ink-jet printing inks. 展开更多
关键词 nanoparticles nano bimetal AG nanoparticles
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Structural and thermal stabilities of Au@Ag core-shell nanoparticles and their arrays:A molecular dynamics simulation
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作者 Hai-Hong Jia De-Liang Bao +1 位作者 Yu-Yang Zhang Shi-Xuan Du 《Chinese Physics B》 SCIE EI CAS CSCD 2020年第4期541-548,共8页
Thermal stability of core-shell nanoparticles(CSNPs)is crucial to their fabrication processes,chemical and physical properties,and applications.Here we systematically investigate the structural and thermal stabilities... Thermal stability of core-shell nanoparticles(CSNPs)is crucial to their fabrication processes,chemical and physical properties,and applications.Here we systematically investigate the structural and thermal stabilities of single Au@Ag CSNPs with different sizes and their arrays by means of all-atom molecular dynamics simulations.The formation energies of all Au@Ag CSNPs we reported are all negative,indicating that Au@Ag CSNPs are energetically favorable to be formed.For Au@Ag CSNPs with the same core size,their melting points increase with increasing shell thickness.If we keep the shell thickness unchanged,the melting points increase as the core sizes increase except for the CSNP with the smallest core size and a bilayer Ag shell.The melting points of Au@Ag CSNPs show a feature of non-monotonicity with increasing core size at a fixed NP size.Further simulations on the Au@Ag CSNP arrays with 923 atoms reveal that their melting points decrease dramatically compared with single Au@Ag CSNPs.We find that the premelting processes start from the surface region for both the single NPs and their arrays. 展开更多
关键词 bimetallic nanoparticles thermal stability MELTING POINT
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