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Integration of morphology and electronic structure modulation on cobalt phosphide nanosheets to boost photocatalytic hydrogen evolution from ammonia borane hydrolysis 被引量:2
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作者 Chao Wan Yu Liang +5 位作者 Liu Zhou Jindou Huang Jiapei Wang Fengqiu Chen Xiaoli Zhan Dang-guo Cheng 《Green Energy & Environment》 SCIE EI CAS CSCD 2024年第2期333-343,共11页
The controllable and safe hydrogen storage technologies are widely recognized as the main bottleneck for the accomplishment of sustainable hydrogen energy.Ammonia borane(AB)has regarded as a competitive candidate for ... The controllable and safe hydrogen storage technologies are widely recognized as the main bottleneck for the accomplishment of sustainable hydrogen energy.Ammonia borane(AB)has regarded as a competitive candidate for chemical hydrogen storage.However,developing efficient yet high-performance catalysts towards hydrogen evolution from AB hydrolysis remains an enormous challenge.Herein,cobalt phosphide nanosheets are synthesized by a facile salt-assisted along with low-temperature phosphidation strategy for simultaneously modulating its morphology and electronic structure,and function as hydrogen evolution photocatalysts.Impressively,the Co_(2)P nanosheets display extraordinary performance with a record high turnover frequency of 44.9 min^(-1),outperforming most of the noble-metal-free catalysts reported to date.This remarkable performance is attributed to its desired nanosheets structure,featuring with high specific surface area,abundant exposed active sites,and short charge diffusion paths.Our findings provide a novel strategy for regulating metal phosphides with desired phase structure and morphology for energy-related applications and beyond. 展开更多
关键词 Ammonia borane Hydrogen generation HYDROLYSIS Cobalt phosphide nanosheets PHOTOCATALYSIS
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Ammonia borane-enabled hydrogen transfer processes:Insights into catalytic strategies and mechanisms 被引量:1
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作者 Wenfeng Zhao Hu Li +2 位作者 Heng Zhang Song Yang Anders Riisager 《Green Energy & Environment》 SCIE EI CAS CSCD 2023年第4期948-971,共24页
Transfer hydrogenation(TH) with in situ generated hydrogen donor is of great importance in reduction reactions, and an alternative strategy to traditional hydrogenation processes involving pressurized molecular hydrog... Transfer hydrogenation(TH) with in situ generated hydrogen donor is of great importance in reduction reactions, and an alternative strategy to traditional hydrogenation processes involving pressurized molecular hydrogen. Ammonia borane(NH3BH3, AB) is a promising material of hydrogen storage, and it has attracted much attention in reductive organic transformations owing to its high activity, good atom economy, nontoxicity, sustainability, and ease of transport and storage. This review focuses on summarizing the recent progress of AB-mediated TH reactions of diverse substrates including nitro compounds, nitriles, imines, alkenes, alkynes, carbonyl compounds(ketones and aldehydes), carbon dioxide,and N-and O-heterocycles. Syntheses protocols(metal-containing and metal-free), the effect of reaction parameters, product distribution, and variation of reactivity are surveyed, and the mechanism of each reaction involving the action mode of AB as well as structure-activity relationships is discussed in detail. Finally, perspectives are presented to highlight the challenges and opportunities for AB-enabled TH reactions of unsaturated compounds. 展开更多
关键词 Transfer hydrogenation Ammonia borane Hydrogen donor Reaction mechanism Catalytic strategies
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Anomalous metastable hcp Ni nanocatalyst induced by non-metal N doping enables promoted ammonia borane dehydrogenation 被引量:1
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作者 Ping Li Yuqi Huang +3 位作者 Quhua Huang Ran Chen Jixin Li Shuanghong Tian 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2023年第4期72-82,共11页
Developing high-performing non-noble transition metal catalysts for H_(2) evolution from chemical hydrogen storage materials is of great significance for the hydrogen economy system, yet challenging. Herein,we present... Developing high-performing non-noble transition metal catalysts for H_(2) evolution from chemical hydrogen storage materials is of great significance for the hydrogen economy system, yet challenging. Herein,we present for the first time that anomalous metastable hexagonal close-packed Ni nanoparticles induced by heteroatom N doping encapsulated in carbon(N-hcp-Ni/C) can exhibit admirable catalytic performance for ammonia borane(AB) dehydrogenation, prominently outperforming conventional fcc Ni counterpart with similar morphology and favorably presenting the state-of-the-art level.Comprehensive experimental and theoretical studies unravel that unusual hcp phase engineering of Ni together with N doping could induce charge redistribution and modulate electronic structure, thereby facilitating H_(2)O adsorption and expediting H_(2)O dissociation(rate-determining step). As a result, AB dehydrogenation can be substantially boosted with the assistance of N-hcp-Ni/C. Our proposed strategy highlights that unconventional crystal phase engineering coupled with non-metal heteroatom doping is a promising avenue to construct advanced transition metal catalysts for future renewable energy technologies. 展开更多
关键词 Hcp Ni Non-metal doping Phase engineering Electronic regulation Ammonia borane dehydrogenation
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A step‐growth strategy to grow vertical porous aromatic framework nanosheets on graphene oxide:Hybrid material‐confined Co for ammonia borane methanolysis
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作者 Xiugang Li Qilu Yao +2 位作者 Rongwei Shi Minsong Huang Zhang‐Hui Lu 《Carbon Energy》 SCIE EI CAS CSCD 2023年第10期64-76,共13页
The rational synthesis of a two-dimensional(2D)porous aromatic framework(PAF)with a controllable growth direction remains a challenge to overcome the limitation of traditional stacked 2D materials.Herein,a step-growth... The rational synthesis of a two-dimensional(2D)porous aromatic framework(PAF)with a controllable growth direction remains a challenge to overcome the limitation of traditional stacked 2D materials.Herein,a step-growth strategy is developed to fabricate a vertically oriented nitrogen-rich porous aromatic framework on graphene oxide(V-PAF-GO)using monolayer benzidine-functionalized GO(BZ-GO)as a molecular pillar.Then,the confined Co nanoparticle(NP)catalysts are synthesized by encapsulating ultra-small Co into the slit pores of V-PAF-GO.Due to the high nitrogen content,large specific surface area,and adequate slit pores,the optimized vertical nanocomposites V-PAF-GO provide abundant anchoring sites for metal NPs,leading to ultrafine Co NPs(1.4 nm).The resultant Co/V-PAF-GO catalyst shows an extraordinary catalytic activity for ammonia borane(AB)methanolysis,yielding a turnover frequency value of 47.6 min−1 at 25°C,comparable to the most effective non-noble-metal catalysts ever reported for AB methanolysis.Experimental and density functional theory studies demonstrate that the electron-donating effect of N species of PAF positively corresponds to the low barrier in methanol molecule activation,and the cleavage of the O–H bond in CH3OH has been proven to be the rate-determining step for AB methanolysis.This work presents a versatile step-growth strategy to prepare a vertically oriented PAF on GO to solve the stacking problem of 2D materials,which will be used to fabricate other novel 2D or 2D–2D materials with controllable orientation for various applications. 展开更多
关键词 2D-2D materials ammonia borane graphene oxide METHANOLYSIS porous aromatic frameworks
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Bimetallic RuM(M=Co,Ni)Alloy NPs Supported on MIL-110(AI):Synergetic Catalysis in Hydrolytic Dehydrogenation of Ammonia Borane 被引量:2
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作者 宁红辉 鲁迪 +5 位作者 周立群 陈锰寰 李悦 周高建 彭薇薇 王峥 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2018年第1期99-110,I0002,共13页
By adjusting various Ru/M (M=Co, Ni) molar ratios, a series of highly dispersed bimetallic RuM alloy nanoparticles (NPs) anchored on MIL-110(Al) have been successfully prepared via a conventional impregnation-re... By adjusting various Ru/M (M=Co, Ni) molar ratios, a series of highly dispersed bimetallic RuM alloy nanoparticles (NPs) anchored on MIL-110(Al) have been successfully prepared via a conventional impregnation-reduction method. And they are first used as heterogeneous catalysts for the dehydrogenation reaction of AB at room temperature. The results reveal that the as-prepared RulCo1@MIL-110 and RulNi1@MIL-110 exhibit the highest catalytic activities in different RuCo and RuNi molar ratios, respectively. It is worthy of note that the turnover frequency (TOF) values of Ru1Co1@MIL-110 and Ru1Ni1@MIL-110 catalysts reached 488.1 and 417.1 mol H2 min-1 (mol Ru)-1 and the activation energies (Ea) are 31.7 and 36.0 k J/tool, respectively. The superior catalytic performance is attributed to the bimetallic synergistic action between Ru and M, uniform distribution of metal NPs as well as bi-functional effect between RuM alloy NPs and MIL-110. Moreover, these catalysts exhibit favorable stability after 5 consecutive cycles for the hydrolysis of AB. 展开更多
关键词 RuCo@MIL-110 RuNi@MIL-110 Ammonia borane Hydrogen production
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Interface electron collaborative migration of Co–Co3O4/carbon dots:Boosting the hydrolytic dehydrogenation of ammonia borane 被引量:8
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作者 Han Wu Min Wu +5 位作者 Boyang Wang Xue Yong Yushan Liu Baojun Li Baozhong Liu Siyu Lu 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2020年第9期43-53,I0002,共12页
Ammonia borane(AB)is an excellent candidate for the chemical storage of hydrogen.However,its practical utilization for hydrogen production is hindered by the need for expensive noble-metal-based catalysts.Herein,we re... Ammonia borane(AB)is an excellent candidate for the chemical storage of hydrogen.However,its practical utilization for hydrogen production is hindered by the need for expensive noble-metal-based catalysts.Herein,we report Co-Co3O4 nanoparticles(NPs)facilely deposited on carbon dots(CDs)as a highly efficient,robust,and noble-metal-free catalyst for the hydrolysis of AB.The incorporation of the multiinterfaces between Co,Co3O4 NPs,and CDs endows this hybrid material with excellent catalytic activity(rB=6816 mLH2 min^-1 gCo^-1)exceeding that of previous non-noble-metal NP systems and even that of some noble-metal NP systems.A further mechanistic study suggests that these interfacial interactions can affect the electronic structures of interfacial atoms and provide abundant adsorption sites for AB and water molecules,resulting in a low energy barrier for the activation of reactive molecules and thus substantial improvement of the catalytic rate. 展开更多
关键词 Ammonia borane Hydrogen evolution Co-Co3O4 interface Carbon dots Nanoparticles
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Core-shell structured nanospheres with mesoporous silica shell and Ni core as a stable catalyst for hydrolytic dehydrogenation of ammonia borane 被引量:1
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作者 Hua Liu Changyan Cao +2 位作者 Ping Li Yu Yu Weiguo Song 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2014年第1期50-56,共7页
Core-shell structured nanospheres with mesoporous silica shell and Ni core(denoted as Ni@meso-SiO2) are prepared through a three-step process. Monodispersed Ni precursors are first prepared, and then coated with mesop... Core-shell structured nanospheres with mesoporous silica shell and Ni core(denoted as Ni@meso-SiO2) are prepared through a three-step process. Monodispersed Ni precursors are first prepared, and then coated with mesoporous SiO2. Final Ni@meso-SiO2spheres are obtained after calcination. The products are characterized by X-ray powder diffraction, transmission electron microscopy and N2adsorption-desorption methods. These spheres have a high surface area and are well dispersed in water, showing a high catalytic activity with a TOF value of 18.5,and outstanding stability in hydrolytic dehydrogenation of ammonia borane at room temperature. 展开更多
关键词 heterogeneous catalysis NICKEL hydrogen ammonia borane CORE-SHELL
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Convenient Asymmetric Borane Reduction of Ketones Catalyzed by Simple Amino Alcohols and Corresponding Amino Acids 被引量:1
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作者 Guo Bin SUN Wei Wei PEI +1 位作者 Hui WANG Wei Ping YE 《Chinese Chemical Letters》 SCIE CAS CSCD 2002年第12期1147-1148,共2页
An asymmetric borane reduction of prochiral ketones catalyzed by simple amino alcohols and corresponding amino acids was examined to give alcohols with e.e. value up to 92% .
关键词 Enantioselective borane reduction amino alcohols amino acids ketones.
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Carbon dots-confined CoP-CoO nanoheterostructure with strong interfacial synergy triggered the robust hydrogen evolution from ammonia borane 被引量:3
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作者 Han Wu Yaojia Cheng +5 位作者 Boyang Wang Yao Wang Min Wu Weidong Li Baozhong Liu Siyu Lu 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2021年第6期198-205,I0006,共9页
Ammonia borane(NH_(3)BH_(3),AB) is promising for chemical hydrogen sto rage;however,current systems for rapid hydrogen production are limited by the expensive noble metal catalysts required for AB hydrolysis.Here we r... Ammonia borane(NH_(3)BH_(3),AB) is promising for chemical hydrogen sto rage;however,current systems for rapid hydrogen production are limited by the expensive noble metal catalysts required for AB hydrolysis.Here we report the design and synthesis of a highly efficient and robust non-noble-metal catalyst for the hydrolysis of AB at 298 K(TOF=89.56 molH_(2) min^(-1) molCo^(-1)).Experiments and density functional theory calculations were performed to explore the catalyst’s hybrid nanoparticle heterostructure and its catalytic mechanism.The catalyst comprised nitrogen-doped carbon dots confining CoO and CoP,and exhibited strong interface-induced synergistic catalysis for AB hydrolysis that effectively decreased the energy barriers for the dissociation of both AB and water molecules.The co-doping of N and P introduced numerous defects,and further regulated the reactivity of the carbon layers.The heterogeneous interface design technique presented here provides a new strategy for developing efficient and inexpensive non-noblemetal catalysts that may be applicable in other fields related to energy catalysis. 展开更多
关键词 Nano-heterostructure Interface engineering Ammonia borane Hydrolysis mechanism Hydrogen
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Co-CoO_x supported onto TiO_(2) coated with carbon as a catalyst for efficient and stable hydrogen generation from ammonia borane 被引量:3
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作者 Guang Yang Shuyan Guan +3 位作者 Sehrish Mehdi Yanping Fan Baozhong Liu Baojun Li 《Green Energy & Environment》 SCIE CSCD 2021年第2期236-243,共8页
Ammonia borane(AB) can be catalytically hydrolyzed to provide hydrogen at room temperature due to its high potentaial for hydrogen storage. Non-precious metal heterogeneous catalysts have broad application in the fiel... Ammonia borane(AB) can be catalytically hydrolyzed to provide hydrogen at room temperature due to its high potentaial for hydrogen storage. Non-precious metal heterogeneous catalysts have broad application in the field of energy catalysis. In this article, catalysts precursor is obtained from Co-Ti-resorcinol-formaldehyde resin by sol–gel method. Co/TiO_(2)@N-C(CTC) catalyst is prepared by calcining the precursor under high temperature conditions in nitrogen atmosphere. Co-CoO_x/TiO_(2)@N-C(COTC) is generated by the controllable oxidation reaction of CTC. The catalyst can effectively promote the release of hydrogen during the hydrolytic dehydrogenation of AB. High hydrogen generation at a specific rate of 5905 m L min^(-1) g_(Co)^(-1) is achieved at room temperature. The catalyst retains its 85% initial catalytic activity even for its fifth time use in AB hydrolysis. The synergistic effect among Co, Co_(3)O_(4) and TiO_(2) promotes the rate limiting step with dissociation and activation of water molecules by reducing its activation energy. The applied method in this study promotes the development of non-precious metals in catalysis for utilization in clean energy sources. 展开更多
关键词 Ammonia borane COBALT Hydrogen generation N-doped carbon Titanium dioxide
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Single Pt Atoms Supported on Oxidized Graphene as a Promising Catalyst for Hydrolysis of Ammonia Borane 被引量:1
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作者 Hong Wu Qi-quan Luo +2 位作者 Rui-qi Zhang Wen-hua Zhang Jin-long Yang 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2018年第5期641-648,735,共9页
Based on density functional theory calculations,the full hydrolysis of per NH3BH3 molecule to produce three hydrogen molecules on single Pt atoms supported on oxidized graphene(Pt1/Gr-O)is investigated.It is suggested... Based on density functional theory calculations,the full hydrolysis of per NH3BH3 molecule to produce three hydrogen molecules on single Pt atoms supported on oxidized graphene(Pt1/Gr-O)is investigated.It is suggested that the first hydrogen molecule is produced by the combination of two hydrogen atoms from two successive B-H bonds breaking.Then one H2O molecule attacks the left*BHNH3 group(*represents adsorbed state)to form*BH(H2O)NH3 and the elongated O-H bond is easily broken to produce*BH(OH)NH3.The second H2O molecule attacks*BH(OH)NH3 to form*BH(OH)(H2O)NH3 and the breaking of O-H bond pointing to the plane of Pt1/Gr-O results in the desorption of BH(OH)2NH3.The second hydrogen molecule is produced from two hydrogen atoms coming from two H2O molecules and Pt1/Gr-O is recovered after the releasing of hydrogen molecule.The third hydrogen molecule is generated by the further hydrolysis of BH(OH)2NH3 in water solution.The rate-limiting step of the whole process is the combination of one H2O molecule and*BHNH3 with an energy barrier of 16.1 kcal/mol.Thus,Pt1/Gr-O is suggested to be a promising catalyst for hydrolysis of NH3BH3 at room temperature. 展开更多
关键词 Density functional theory Single atom catalysis Platinum Oxidized graphene Ammonia borane hydrolysis
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Asymmetric Reduction of Aromatic Ketones Catalyzed by Using (αs,4s)-2-Dichloromethyl-4,5-Dihydro-α-(4-Nitrophenyl)-4- Oxazolemethanol-Borane Complex
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作者 Shi Yu, Hu Quan-yuan, Yang Shao-rong, Hu Xian-ming College of Pharmacy, Wuhan University, Wuhan 430072, Hubei, China 《Wuhan University Journal of Natural Sciences》 EI CAS 2002年第1期113-116,共4页
Chiral oxazoborolidine borane complex was prepared from (αs, 4s)-2-dichloromethyl-4, 5-dihydro-α-(4-nitrophenyl)-4-oxazolemethanol with Borane in THF. The borane modified by chiral oxazoborolidine enantioselectively... Chiral oxazoborolidine borane complex was prepared from (αs, 4s)-2-dichloromethyl-4, 5-dihydro-α-(4-nitrophenyl)-4-oxazolemethanol with Borane in THF. The borane modified by chiral oxazoborolidine enantioselectively reduced aromatic ketones to second-alcohol with about 95%yield and medium optical yields. In the end of article, results are discussed and reduction mechanism is shown which proves the resulting major isomers fit very well. 展开更多
关键词 asymmetric reduction prochiral ketones chiral oxazoborolidine borane CHLORAMPHENICOL OXAZOLINE
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EFFECTS OF RATE OF ADDITION AND TENIPERATURE ON THE ENANTIOSELECTIVITY IN BORANE REDUCTION OF KETONES CATALYZED BY CHIRAL OXAZABOROLIDINE
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作者 Yao Zhong JIANG Yong +1 位作者 QIN snd Ai Qiao MIChengdu Institute of Organic Chemtetry, A cademia Sinica, Chengdu 610041 《Chinese Chemical Letters》 SCIE CAS CSCD 1995年第1期9-12,共4页
The exoellent enantioselectivity with o. p. >99% in asymmetrio borane reduction of acetophenone catalyzed by (4S, 5R ) 4, 5-diphenyi-1. 3. 2-oxazaborolidine has been achieved via the important modincation of the ... The exoellent enantioselectivity with o. p. >99% in asymmetrio borane reduction of acetophenone catalyzed by (4S, 5R ) 4, 5-diphenyi-1. 3. 2-oxazaborolidine has been achieved via the important modincation of the reaction conditions. 展开更多
关键词 RATE REDUCTION borane BY CATALYZED CHIRAL EFFECTS IN KETONES OF
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Two-Dimensional Borane with ‘Banana' Bonds and Dirac-Like Ring
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作者 武红 王允辉 +1 位作者 杨志红 李峰 《Chinese Physics Letters》 SCIE CAS CSCD 2018年第3期67-70,共4页
Designing new two-dimensional (2D) semiconductors with novel topological characters is highly desirable for further material innovation. We propose a theoretical design of a stable 2D inorganic material, namely, bor... Designing new two-dimensional (2D) semiconductors with novel topological characters is highly desirable for further material innovation. We propose a theoretical design of a stable 2D inorganic material, namely, borane, which is jointly stabilized by traditional B B localized and unique B-H-B delocalized chemical bonds. In borane, the bonding natures along different directions are distinguishing, which lead to huge differences in mechanical strengths of 142.73 and 97.47N/m for a and b directions, respectively. In a unit cell, each hydrogen atom binds to two boron atoms forming a three-center-two-electron (3c-2e) bridge bond B H B. This can be considered as an extension of diborane molecules from OD to 2D. The collaboration of localized and delocalized chemical bonds endows borane with high structural stability, as indicated by its favorable cohesive energy, high mechanical strength, absence of imaginary modes in the phonon spectrum, and moderate melting point. Remarkably, borane has a fascinating electronic property featured with a Dirae-like ring in the electronic band structure. The unique bonding nature and electronic property in borane would attract intensive interests in both theory and experiment. 展开更多
关键词 BANANA Bonds and Dirac-Like Ring Two-Dimensional borane with
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Structures and Stability of Metal Amidoboranes (MAB): Density Functional Calculations
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作者 李采临 吴朝铃 +4 位作者 陈云贵 周晶晶 郑欣 庞丽娟 邓刚 《Communications in Theoretical Physics》 SCIE CAS CSCD 2010年第6期1167-1171,共5页
Molecule geometry structures, frequencies, and energetic stabilities of ammonia borane (AB, NH3BH3 ) and metal amidoboranes (MAB, MNH2BH3), formed by substituting H atom in AB with one of main group metal atoms, h... Molecule geometry structures, frequencies, and energetic stabilities of ammonia borane (AB, NH3BH3 ) and metal amidoboranes (MAB, MNH2BH3), formed by substituting H atom in AB with one of main group metal atoms, have been investigated by density-functional theory and optimized at the B3LYP levels with 6-311G++ (3dr, 3pd) basic set. Their structural parameters and infrared spectrum characteristic peaks have been predicted, which should be the criterion of a successfully synthesized material. Several parameters such as binding energies, vibrational frequencies, and the energy gaps between the HOMO and the LUMO have been adopted to characterize and evaluate their structure stabilities. It is also found that the binding energies and HOMO-LUMO energy gaps of the MAB obviously change with the substitution of the atoms. MgAB has the lowest binding energy and is easier to decompose than any other substitutional structures under same conditions, while CaAB has the highest chemical activity. 展开更多
关键词 ammonia borane metal amidoboranes hydrogen storage density functional theory
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Polymer Film Supported Bimetallic Au–Ag Catalysts for Electrocatalytic Oxidation of Ammonia Borane in Alkaline Media
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作者 Sukriye Ulubay Karabiberoglu Cagri Ceylan Kocak +1 位作者 Suleyman Kocak Zekerya Dursun 《Nano-Micro Letters》 SCIE EI CAS 2016年第4期358-370,共13页
Ammonia borane is widely used in most areas including fuel cell applications.The present paper describes electrochemical behavior of ammonia borane in alkaline media on the poly(p-aminophenol) film modified with Au an... Ammonia borane is widely used in most areas including fuel cell applications.The present paper describes electrochemical behavior of ammonia borane in alkaline media on the poly(p-aminophenol) film modified with Au and Ag bimetallic nanoparticles.The glassy carbon electrode was firstly covered with polymeric film electrochemically and then,Au,Ag,and Au–Ag nanoparticles were deposited on the polymeric film,respectively.The surface morphology and chemical composition of these electrodes were examined by scanning electron microscopy,transmission electron microscopy,electrochemical impedance spectroscopy,X-ray diffraction,and X-ray photoelectron spectroscopy.It was found that alloyed Au–Ag bimetallic nanoparticles are formed.Electrochemical measurements indicate that the developed electrode modified by Au–Ag bimetallic nanoparticles exhibit the highest electrocatalytic activity for ammonia borane oxidation in alkaline media.The rotating disk electrode voltammetry demonstrates that the developed electrode can catalyze almost six-electron oxidation pathway of ammonia borane.Our results may be attractive for anode materials of ammonia borane fuel cells under alkaline conditions. 展开更多
关键词 Au-Ag bimetallic nanoparticles Ammonia borane ELECTROCATALYST ELECTROPOLYMERIZATION Alkaline media
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Borane-Tetrahydrofurane Complex Reduction of Nickel and First Transition Metals in Tetrahydrofurane Media: Controllable Chemistry Leading to Nanoscale Metal and Metal Boride Particles
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作者 Delicia Acosta Elio E. Gonzo Hugo A. Destéfanis 《Modern Research in Catalysis》 CAS 2016年第1期19-30,共12页
Nickel borides doped with transition metal (Cr, Mn, Fe, Co, Cu, and Zn) MNiB, 4% w/w respect to Ni were prepared by chemical reduction of nickel and metallic salts in methanol solution with borane-tetrahydrofurane (BH... Nickel borides doped with transition metal (Cr, Mn, Fe, Co, Cu, and Zn) MNiB, 4% w/w respect to Ni were prepared by chemical reduction of nickel and metallic salts in methanol solution with borane-tetrahydrofurane (BH<sub>3</sub>-THF) complex obtained in aprotic solvent (THF anhydrous). Different techniques were used to characterize these materials. The MNiB amorphous structure was verified by XRD. Thermal treatment in N<sub>2</sub> shows Ni°, Ni<sub>2</sub> Band NiO phases. Spongy-morphology was evident by SEM studies in all cases. XPS and TEM show that doped and non-doped nickel boride was present as Ni° in metallic state as principal phase and nickel alloying with boron was observed in minor quantities. The oxidation stability, magnetic susceptibility and catalytic effect are correlated with parameters of each dopant metal. 展开更多
关键词 NIB Doped NiB borane-Tetrahydrofurane Reduction Catalyst
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Ni_(0.6)Cu_(0.4)O/NC催化剂的制备及其催化氨硼烷水解制氢性能研究
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作者 李蓉 左佑华 +4 位作者 花俊峰 郝思雨 许立信 叶明富 万超 《燃料化学学报(中英文)》 EI CAS CSCD 北大核心 2024年第8期1184-1192,共9页
本研究在氮气气氛下高温碳化Ni/Cu-ZIF前驱体制备了一种含氮炭材料(Ni_(0.6)Cu_(0.4)O/NC)催化剂,并采用多种表征方法对所制备催化剂的微观结构以及组成成分进行了研究。此外,通过控制变量法探究了催化剂的催化性能以及变化规律。研究... 本研究在氮气气氛下高温碳化Ni/Cu-ZIF前驱体制备了一种含氮炭材料(Ni_(0.6)Cu_(0.4)O/NC)催化剂,并采用多种表征方法对所制备催化剂的微观结构以及组成成分进行了研究。此外,通过控制变量法探究了催化剂的催化性能以及变化规律。研究结果表明,Ni_(0.6)Cu_(0.4)O/NC催化AB水解制氢的活化能(Ea)为56.8 kJ/mol,TOF值高达1572.2 h^(−1)。该催化剂催化AB水解制氢速率对于AB自身浓度可近似看作零级反应,而相对于催化剂的用量可近似看作一级反应。催化剂经过10次循环后仍然保持良好的催化活性,表明其具有良好的稳定性。 展开更多
关键词 含氮炭材料 氨硼烷 水解制氢
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碳材料在催化氨硼烷水解释氢中的应用
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作者 李冰 刘军辉 +4 位作者 李梦婷 李想 宋亚坤 郭旭明 熊健 《化工新型材料》 CAS CSCD 北大核心 2024年第8期67-72,76,共7页
碳材料因其独特的化学和结构特性,在催化领域包括催化氨硼烷水解释氢中有广泛的应用。以碳材料的结构为侧重点,综述了不同维度形态的碳材料在催化氨硼烷水解释氢中的作用,并对其在催化氨硼烷水解释氢中所存在的问题以及今后的发展进行... 碳材料因其独特的化学和结构特性,在催化领域包括催化氨硼烷水解释氢中有广泛的应用。以碳材料的结构为侧重点,综述了不同维度形态的碳材料在催化氨硼烷水解释氢中的作用,并对其在催化氨硼烷水解释氢中所存在的问题以及今后的发展进行了总结和展望。 展开更多
关键词 碳材料 维度 氨硼烷 释氢 催化剂
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双模板剂合成CO_(2)P纳米片及其催化氨硼烷水解性能的研究
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作者 孙佳丽 郑君宁 +4 位作者 花俊峰 邱小魁 许立信 叶明富 万超 《石油炼制与化工》 CAS CSCD 北大核心 2024年第2期186-192,共7页
开发一种在温和条件下具有高活性、高选择性的催化剂是实现氨硼烷水解制氢应用的关键。以构建具有P掺杂材料为出发点,以两种不同比例的金属盐作为模板剂,以过渡非贵金属Co为中心金属,合成出制作方法简便、性能优异的催化剂。通过乙酸钴... 开发一种在温和条件下具有高活性、高选择性的催化剂是实现氨硼烷水解制氢应用的关键。以构建具有P掺杂材料为出发点,以两种不同比例的金属盐作为模板剂,以过渡非贵金属Co为中心金属,合成出制作方法简便、性能优异的催化剂。通过乙酸钴和氨水制备出Co_(3)O_(4)前躯体,将Co_(3)O_(4)前躯体与NaH_(2)PO_(2),NaCl,LiCl混合,在N_(2)气氛下焙烧,然后进行水洗将两种盐模板剂去除,得到纳米片催化剂CO_(2)P-NaLi。试验结果表明,当n(NaCl)∶n(LiCl)=1∶0.15时制备的催化剂CO_(2)P-NaLi_(0.15)催化活性最高,其在298 K、光照条件下催化氨硼烷水解反应的初始转化率(TOF)为31.2 min^(-1),且该催化剂上氨硼烷分解的活化能(E_(a))为60.8 kJ/mol。循环5次后,催化剂依然保持良好活性,表明其拥有良好的稳定性。 展开更多
关键词 磷化钴 氨硼烷 储氢材料 盐模板剂法
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