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Multiple carbon interface engineering to boost oxygen evolution of Ni Fe nanocomposite electrocatalyst 被引量:1
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作者 Yuyan Qiao Yanqiu Pan +7 位作者 Jiangwei Zhang Bin Wang Tingting Wu Wenjun Fan Yucheng Cao Rashid Mehmood Fei Zhang Fuxiang Zhang 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2022年第9期2354-2362,共9页
Interface engineering has been widely investigated to regulate the structure and performance of electrodes and photoelectrodes,but the investigation of multiple carbon interface modifications on the electrocatalytic o... Interface engineering has been widely investigated to regulate the structure and performance of electrodes and photoelectrodes,but the investigation of multiple carbon interface modifications on the electrocatalytic oxygen evolution reaction(OER)is still shortage.Herein,we report remarkable promotion of OER performance on the NiFe‐based nanocomposite electrocatalyst via the synergy of multiple carbon‐based interface engineering.Specifically,carbon nanotubes were in situ grown on carbon fiber paper to improve the interface between CFP and NiFeO_(x)H_(y),and graphite carbon nanoparticles were in situ loaded and partly doped into the NiFeO_(x)H_(y) to modify the intergranular interface charge transfer and electronic structure of NiFeO_(x)H_(y).Consequently,the as‐obtained NiFeO_(x)H_(y)‐C/CNTs/CFP catalyst exhibited significantly enhanced electrocatalytic OER activity with an overpotential of 202 mV at 10 mA cm^(-2) in 1 mol L^(-1) KOH.Our work not only extends application of carbon materials but also provides an alternative strategy to develop highly efficient electrocatalysts. 展开更多
关键词 electro catalyst Oxygen evolution reaction Interface engineering Carbon nanotube NANOCOMPOSITE
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Gas-phase electrocatalytic conversion of CO_2 to chemicals on sputtered Cu and Cu–C catalysts electrodes 被引量:4
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作者 N.Gutiérrez-Guerra J.A.González +3 位作者 J.C.Serrano-Ruiz E.López-Fernández J.L.Valverde A.de Lucas-Consuegra 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2019年第4期46-53,共8页
A novel gas-phase electrocatalytic cell containing a low-temperature proton exchange membrane(PEM)was developed to electrochemically convert CO_2into organic compounds.Two different Cu-based cathode catalysts(Cu and C... A novel gas-phase electrocatalytic cell containing a low-temperature proton exchange membrane(PEM)was developed to electrochemically convert CO_2into organic compounds.Two different Cu-based cathode catalysts(Cu and Cu–C)were prepared by physical vapor deposition method(sputtering)and subsequently employed for the gas-phase electroreduction of CO_2at different temperatures(70–90°C).The prepared electrodes Cu and Cu–C were characterized by X-ray diffraction(XRD),X-ray photoemission spectroscopy(XPS)and scanning electron microscopy(SEM).As revealed,Cu is partially oxidized on the surface of the samples and the Cu and Cu–C cathodic catalysts were comprised of a porous,continuous,and homogeneous film with nanocrystalline Cu with a grain size of 16 and 8 nm,respectively.The influence of the applied current and temperature on the electro-catalytic activity and selectivity of these materials was investigated.Among the two investigated electrodes,the pure Cu catalyst film showed the highest CO_2specific electrocatalytic reduction rates and higher selectivity to methanol formation compared to the Cu–C electrode,which was attributed to the higher particle size of the former and lower Cu O/Cu ratio.The obtained results show potential interest for the possible use of electrical renewable energy for the transformation of CO_2into valuable products using low metal loading Cu based electrodes(0.5 mg Cu cm^(-2))prepared by sputtering. 展开更多
关键词 CO_2 valorization electro-REDUCTION Cu catalyst PEM Selectivity Methanol production
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Carbon nanotubes-Nafion composites as Pt-Ru catalyst support for methanol electro-oxidation in acid media 被引量:2
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作者 Shengzhou Chen Fei Ye Weiming Lin 《Journal of Natural Gas Chemistry》 EI CAS CSCD 2009年第2期199-204,共6页
Carbon nanotubes-Nafion (CNTs-Nation) composites were prepared by impregnated CNTs with Nation in ethanol solution and characterized by FT-IR. Pt-Ru catalysts supported on CNTs-Nafion composites were synthesized by ... Carbon nanotubes-Nafion (CNTs-Nation) composites were prepared by impregnated CNTs with Nation in ethanol solution and characterized by FT-IR. Pt-Ru catalysts supported on CNTs-Nafion composites were synthesized by microwave-assisted polyol process. The physical and electrochemical properties of the catalysts were characterized by X-ray diffraction (XRD), transmission electron microscope (TEM), CO stripping voltammetry, cyclic voltammetry (CV) and chronoamperometry (CA). The results showed that the Nation incorporation in CNTs-Nation composites did not significantly alter the oxygen-containing groups on the CNTs surface. The Pt-Ru catalyst supported on CNTs-Nafion composites with 2 wt% Naton showed good dispersion and the best CO oxidation and methanol electro-oxidation activities. 展开更多
关键词 carbon nanotubes-Nafion composites Pt-Ru catalysts methanol electro-oxidation
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Activation of commercial Pt/C catalyst toward glucose electro-oxidation by irreversible Bi adsorption 被引量:1
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作者 Petri Kanninen Tanja Kallio 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2018年第5期1446-1452,共7页
The effect of irreversibly adsorbed Bi on commercial Pt/C catalyst toward glucose electro-oxidation re- action (GOR) in different electrolytes (acidic, neutral, alkaline) is studied. Bi is successfully deposited o... The effect of irreversibly adsorbed Bi on commercial Pt/C catalyst toward glucose electro-oxidation re- action (GOR) in different electrolytes (acidic, neutral, alkaline) is studied. Bi is successfully deposited on Pt/C from Bi3+ containing acidic solution from 0 to 90% coverage degree. The stability of the Bi layer in acid and alkaline corresponded to previous studies and started to dissolve at 0.7 V and 0.8 V versus re- versible hydrogen electrode (RIIE), respectively. However, in neutral phosphate buffer the layer showed remarkable stability to at least 1.2V versus RHE. Bi modification at low (20%) and high (80%) coverage showed the highest increase in the activity of Pt/C toward GOR by a factor up to 7 due to the increased poisoning resistance of the modified catalyst. The effect of poisoning was especially reduced at high Bi coverage (80%), which shows that adsorbate blocked by Bi through the third-body effect is effective. Finally, with or without Bi modification GOR on PtIC was most active in alkaline conditions. 展开更多
关键词 Glucose electro-oxidation PLATINUM BISMUTH catalyst poisoning Renewable resources
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Solvent effects on Pt-Ru/C catalyst for methanol electro-oxidation 被引量:2
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作者 Jinwei Chen Chunping Jiang Hui Lu Lan Feng Xin Yang Liangqiong Li Ruilin Wang 《Journal of Natural Gas Chemistry》 EI CAS CSCD 2009年第3期341-345,共5页
Alloying degree, particle size and the level of dispersion are the key structural parameters of Pt-Ru/C catalyst in fuel cells. Solvent(s) used in the preparation process can affect the particle size and alloying de... Alloying degree, particle size and the level of dispersion are the key structural parameters of Pt-Ru/C catalyst in fuel cells. Solvent(s) used in the preparation process can affect the particle size and alloying degree of the object substance, which lead to a great positive impact on its properties. In this work, three types of solvents and their mixtures were used in preparation of the Pt-Ru/C catalysts by chemical reduction of metal precursors with sodium borohydride at room temperature. The structure of the catalysts was characterized by X-ray diffraction (XRD) and Transmission electron microscopy (TEM). The catalytic activity and stability for methanol electro-oxidation were studied by Cyclic Voltammetry (CV) and Chronoamperometry (CA). Pt-Ru/C catalyst prepared in H2O or binary solvents of H2O and isopropanol had large particle size and low alloying degree leading to low catalytic activity and less stability in methanol electro-oxidation. When tetrahydrofuran was added to the above solvent systems, Pt-Ru/C catalyst prepared had smaller particle size and higher alloying degree which resulted in better catalytic activity, lower onset and peak potentials, compared with the above catalysts. Moreover, the catalyst prepared in ternary solvents of isopropanol, water and tetrahydrofuran had the smallest particle size, and the high alloying degree and the dispersion kept unchanged. Therefore, this kind of catalyst showed the highest catalytic activity and good stability for methanol electro-oxidation. 展开更多
关键词 solvent effect fuel cell methanol electro-oxidation Pt-Ru/C catalyst TETRAHYDROFURAN
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Ru effect on the catalytic performance of Pd@Ru/C catalysts for methanol electro-oxidation 被引量:2
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作者 Yanbiao Ren Shichao Zhang Xin Wei 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2015年第2期232-238,共7页
Pd@Ru bimetallic nanoparticles deposited on carbon black electro-catalysts have been fabricated by microwave-assisted polyol reduction method and investigated for methanol electro-oxidation (MEO). The structure and ... Pd@Ru bimetallic nanoparticles deposited on carbon black electro-catalysts have been fabricated by microwave-assisted polyol reduction method and investigated for methanol electro-oxidation (MEO). The structure and electro-catalytic properties of the as-prepared catalysts were characterized by XRD, SEM, TEM and cyclic voltammetry (CV) techniques. The results showed that the introduction of Ru element (2-10 wt%) into Pd 20 wt%/C (hereafter, denoted as Pd/C) produced a series of core-shell structured binary catalysts. Pd@Ru 5 wt%/C (hereafter, denoted as Pd@Rus/C) catalyst displayed the highest catalytic activity towards MEO. And the mass activity of Pd@Ru5/C electrode catalyst at E = -0.038 V (vs. Hg/HgO) was 1.42 times higher than that of Pd/C electrode catalyst. In addition, the relationship between the catalytic stability for MEO on Pd@Ru/C catalysts and the value of dbp/dfp (the ratio of MEO peak current density in the negative scan and positive scan) were also investigated. The result demonstrated that Pd@Rus/C offering the smallest value of Jbp/Jfp displayed the best stable catalytic performance. 展开更多
关键词 methanol electro-oxidation catalytic performance poisoning tolerance core-shell structured catalyst
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Monolithic Mesh-Type Fe-Pd/γ-Al<sub>2</sub>O<sub>3</sub>/Al Bifunctional Catalysts for Electro-Fenton Degradation of Rhodamine B
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作者 Qianwen Shao Guiru Zhang +1 位作者 Linhui Lu Qi Zhang 《Modern Research in Catalysis》 CAS 2021年第2期56-72,共17页
A novel Fe-Pd bifunctional catalyst supported on mesh-type γ-Al<sub>2</sub>O<sub>3</sub>/Al was prepared and applied in the degradation of Rhodamine B (RhB). The monolithic mesh-type Fe-Pd/γ-... A novel Fe-Pd bifunctional catalyst supported on mesh-type γ-Al<sub>2</sub>O<sub>3</sub>/Al was prepared and applied in the degradation of Rhodamine B (RhB). The monolithic mesh-type Fe-Pd/γ-Al<sub>2</sub>O<sub>3</sub>/Al bifunctional catalyst could be separated from the solution directly and could synthesize H<sub>2</sub>O<sub>2</sub> in situ. The characterization results showed that Fe could improve the dispersion of Pd<sup>0</sup>, and the electronic interactions between Pd and Fe could increase the Pd<sup>0</sup> contents on the catalyst, which increased the productivity of H<sub>2</sub>O<sub>2</sub>. Furthermore, DFT calculations proved that the addition of Fe could inhibit the dissociation of O<sub>2</sub> and promote the nondissociative hydrogenation of O<sub>2</sub> on the surface of Fe-Pd/γ-Al<sub>2</sub>O<sub>3</sub>/Al, which resulted in the increasement of H<sub>2</sub>O<sub>2</sub> selectivity. Finally, the in-situ synthesized H<sub>2</sub>O<sub>2</sub> by Pd was furtherly decomposed in situ by Fe to generate<span lang="EN-US" style="white-space:normal;font-size:10pt;font-family:;" "=""><span lang="EN-US" style="white-space:normal;font-size:10pt;font-family:;" "=""><span style="white-space:normal;color:#FFFFFF;font-family:Roboto, " background-color:#d46399;"=""><img src="Edit_e6a13073-7151-40b7-b2c3-a59a59d064fc.png" alt="" /></span></span></span>OH radicals to degrade organic pollutants. Therefore, Fe-Pd/ γ-Al<sub>2</sub>O<sub>3</sub>/Al catalysts exhibited excellent catalytic activity in the in-situ synthesis of H<sub>2</sub>O<sub>2</sub> and the degradation of RhB due to the synergistic effects between Pd and Fe on the catalyst. It provided a new idea for the design of bifunctional electro-Fenton catalysts. Ten cycles of experiments showed that the catalytic activity of Fe-Pd/γ-Al<sub>2</sub>O<sub>3</sub>/Al catalyst could be maintained for a long time. 展开更多
关键词 Rhodamine B Fe-Pd/γ-Al2O3/Al catalyst electro-FENTON Hydrogen Peroxide Synergistic Effects
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Hydrogen Production From Crude Bio-oil and Biomass Char by Electrochemical Catalytic Reforming
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作者 李兴龙 宁坤 +1 位作者 袁丽霞 李全新 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2011年第4期477-483,I0004,共8页
We reports an efficient approach for production of hydrogen from crude bio-oil and biomass char in the dual fixed-bed system by using the electrochemical catalytic reforming method. The maximal absolute hydrogen yield... We reports an efficient approach for production of hydrogen from crude bio-oil and biomass char in the dual fixed-bed system by using the electrochemical catalytic reforming method. The maximal absolute hydrogen yield reached 110.9 g H2/kg dry biomass. The product gas was a mixed gas containing 72%H2, 26%CO2, 1.9%CO, and a trace amount of CH4. It was observed that adding biomass char (a by-product of pyrolysis of biomass) could remarkably increase the absolute H2 yield (about 20%-50%). The higher reforming temperature could enhance the steam reforming reaction of organic compounds in crude bio-oil and the reaction of CO and H20. In addition, the CuZn-Al2O3 catalyst in the water-gas shift bed could also increase the absolute H2 yield via shifting CO to CO2. 展开更多
关键词 Hydrogen BIO-OIL Biomass char Ni-Al2O3 catalyst CuZn-AI203 catalyst electro chemical catalytic reforming
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Synthesis and characterization of ZnO-Al_2O_3 oxides as energetic electro-catalytic material for glucose fuel cell
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作者 Sujit Kumar Guchhait Subir Paul 《燃料化学学报》 EI CAS CSCD 北大核心 2015年第8期1004-1010,共7页
One of the thrust areas of research is to find an alternative fuel to meet the increasing demand for energy.Glucose is a good source of alternative fuel for clean energy and is easily available in abundance from both ... One of the thrust areas of research is to find an alternative fuel to meet the increasing demand for energy.Glucose is a good source of alternative fuel for clean energy and is easily available in abundance from both naturally occurring plants and industrial processes.Electrochemical oxidation of glucose in fuel cell requires high electro-catalytic surface of the electrode to produce the clean electrical energy w ith minimum energy losses in the cell.Pt and Pt based alloys exhibit high electro-catalytic properties but they are expensive.For energy synthesis at economically cheap price,non Pt based inexpensive high electro catalytic material is required.Electro synthesized Zn O-Al2O3composite is found to exhibit high electro-catalytic properties for glucose oxidation.The Cyclic Voltammetry and Chronoamperometry curves reflect that the material is very much comparable to Pt as far as the maximum current and the steady state current delivered from the glucose oxidation are concerned.XRD image confirms the mixed oxide composite.SEM images morphology show increased 3D surface areas at higher magnification.This attributed high current delivered from electrochemical oxidation of glucose on this electrode surface. 展开更多
关键词 GLUCOSE energy materials electro-catalyst cyclic VOLTAMMETRY CHRONOAMPEROMETRY polarization
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Plasma Enhanced Chemical Vapor Deposition Nanocrystalline Tungsten Carbide Thin Film and Its Electro-catalytic Activity 被引量:4
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作者 Huajun ZHENG Chunan MA +1 位作者 Jianguo HUANG Guohua LI 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2005年第4期545-548,共4页
Nanocrystalline tungsten carbide thin films were fabricated on graphite substrates by plasma enhanced chemical vapor deposition (PECVD) at H2 and Ar atmosphere, using WF6 and CH4 as precursors. The crystal phase, st... Nanocrystalline tungsten carbide thin films were fabricated on graphite substrates by plasma enhanced chemical vapor deposition (PECVD) at H2 and Ar atmosphere, using WF6 and CH4 as precursors. The crystal phase, structure and chemical components of the films were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy-dispersive spectrometer (EDS), respectively. The results show that the film prepared at CH4/WF6 concentration ratio of 20 and at 800℃ is composed of spherical particles with a diameter of 20-35 nm. Electrochemical investigations show that the electrochemical real surface area of electrode of the film is large, and the electrode of the film exhibits higher electro-catalytic activity in the reaction of methanol oxidation. The designated constant current of the film catalyst is 123.6 mA/cm^2 in the mixture solution of H2SO4 and CH3OH at the concentration of 0.5 and 2.0 mol/L at 70℃, and the designated constant potential is only 0.306 V (vs SCE). 展开更多
关键词 PECVD Tungsten carbide catalyst Nanocrystalline thin film Methanol electro-oxidation
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电芬顿法(Electro-Fenton Process)处理废水 被引量:4
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作者 王君 《黑龙江科技信息》 2013年第20期92-93,共2页
电芬顿法(electro-Fenton)是在Fenton试剂的基础上,在二价铁离子(Fe2+)和过氧化氢(H2O2)作用下,产生强氧化性的羟基自由基(●OH)并由其氧化难降解废水,其中Fe2+和H2O2分别由电化学过程产生。本文概述了电芬顿过程的基本原理,通过介绍国... 电芬顿法(electro-Fenton)是在Fenton试剂的基础上,在二价铁离子(Fe2+)和过氧化氢(H2O2)作用下,产生强氧化性的羟基自由基(●OH)并由其氧化难降解废水,其中Fe2+和H2O2分别由电化学过程产生。本文概述了电芬顿过程的基本原理,通过介绍国内外电芬顿的发展情况,详细介绍了电芬顿的影响因素,包括pH、阴极电极、催化剂及其他因素等,并展望了其未来的发展方向。 展开更多
关键词 电芬顿 羟基自由基 均相电芬顿 异相电芬顿
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Vastly Synergistic Fe_(2)CuNiS_(4)-Nanoarchitectures Anchored 2D-Nano-Sandwich Derived from Flower-Like-CuFeS_(2)/N-Graphene and Cube-Like-NiFeS_(2)/N-CNTs for Water Oxidation and Nitrophenol Reduction
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作者 Gopiraman Mayakrishnan Ramkumar Vanaraj +5 位作者 Junpeng Xiong Muhammad Farooq Azeem Ullah Keqin Zhang Seong Cheol Kim Ick Soo Kim 《Energy & Environmental Materials》 SCIE EI CAS CSCD 2024年第6期274-289,共16页
Surface area,pore properties,synergistic behavior,homogenous dispersion,and interactions between carbon matrix and metal-nanostructures are the key factors for achieving the better performance of carbon-metal based(el... Surface area,pore properties,synergistic behavior,homogenous dispersion,and interactions between carbon matrix and metal-nanostructures are the key factors for achieving the better performance of carbon-metal based(electro)catalysts.However,the traditional hydro-or solvothermal preparation of(electro)catalysts,particularly,bi-or tri-metallic nanostructures anchored graphene(G)or carbon nanotubes(CNTs),often pose to poor metal–support interaction,low synergism,and patchy dispersion.At first,bimetallic flower-like-CuFeS_(2)/NG and cube-like-NiFeS_(2)/NCNTs nanocomposites were prepared by solvothermal method.The resultant bimetallic nanocomposites were employed to derive the 2D-nano-sandwiched Fe_(2)CuNiS_(4)/NGCNTs-SW(electro)catalyst by a very simple and green urea-mediated“mix-heat”method.The desired physicochemical properties of Fe_(2)CuNiS_(4)/NGCNTs-SW such as multiple active sites,strong metal-support interaction,homogenous dispersion and enhanced surface area were confirmed by various microscopic and spectroscopic techniques.To the best of our knowledge,this is the first urea-mediated“mix-heat”method for preparing 2D-nano-sandwiched carbon-metal-based(electro)catalysts.The Fe_(2)CuNiS_(4)/NGCNTs-SW was found to be highly effective for alkaline-mediated oxygen evolution reaction at low onset potential of 284.24 mV,and the stable current density of 10 mA cm^(−2) in 1.0 m KOH for 10 h.Further,the Fe_(2)CuNiS_(4)/NGCNTs-SW demonstrated excellent catalytic activity in the reduction of 4-nitrophenol with good kapp value of 87.71×10^(−2)s^(-1)and excellent reusability over five cycles.Overall,the developed urea-mediated“mix-heat”method is highly efficient for the preparation of metal-nanoarchitectures anchored 2D-nano-sandwiched(electro)catalysts with high synergism,uniform dispersion and excellent metal-support interaction. 展开更多
关键词 (electro)catalyst metal-sulfide nanoarchitectures mix-heat N-graphene/NCNTs synergistic effect urea
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碳布担载PtBi自支撑电极的制备及其电氧化性能研究——推荐一个综合化学实验
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作者 宁小媚 占亮 +3 位作者 周小松 罗金 周训富 罗翠芬 《大学化学》 CAS 2024年第11期217-224,共8页
本实验通过碳布担载PtBi自支撑电极的制备、表征及电氧化应用,促进“科教融合”,实现创新型人才培养。通过该实验,学生既能更好地理解物理化学中电化学装置和能量转化的内容以及催化剂性能评价指标,激发学生的科研兴趣,又能掌握纳米材... 本实验通过碳布担载PtBi自支撑电极的制备、表征及电氧化应用,促进“科教融合”,实现创新型人才培养。通过该实验,学生既能更好地理解物理化学中电化学装置和能量转化的内容以及催化剂性能评价指标,激发学生的科研兴趣,又能掌握纳米材料的制备、表征、电化学测试等基本实验技能,培养学生的科学素养,提高学生利用电化学及动力学内容分析性能数据、理解电氧化反应过程及电极过程的能力。 展开更多
关键词 碳布 PtBi催化剂 电氧化 综合化学实验
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Surface alloy/GC电催化剂的制备与结构表征 被引量:6
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作者 陈声培 张麒 +1 位作者 黄桃 孙世刚 《精细化工》 EI CAS CSCD 北大核心 2003年第1期44-46,共3页
以玻碳为载体 ,通过电化学方法在其表面沉积催化物质研制表面合金纳米电催化剂 (Surfacealloy/GC)。运用电化学循环伏安 (CV)和扫描电镜 (SEM)等技术进行结构和性能表征。结果表明 ,在Surfacealloy/GC上氢的析出电位负移至 - 0 40V(SCE... 以玻碳为载体 ,通过电化学方法在其表面沉积催化物质研制表面合金纳米电催化剂 (Surfacealloy/GC)。运用电化学循环伏安 (CV)和扫描电镜 (SEM)等技术进行结构和性能表征。结果表明 ,在Surfacealloy/GC上氢的析出电位负移至 - 0 40V(SCE) ,与Pt电极相比负移约 15 0mV ,具有较高的电还原应用价值。另外 ,Surfacealloy/GC的氧化电位正移至 0 64V ,其稳定性明显高于电有机合成中常用的Pb、Sb、Cu等金属电极。SEM研究结果表明 ,所研制的Surfacealloy/GC电催化剂是一种由粒度约为 展开更多
关键词 SURFACE alloy/GC电催化剂 制备 结构表征 碳载表面合金 电催化 SEM
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PEMFC氧电极的研究——助催化元素Ni和Co对Pt/C电催化剂性能的影响 被引量:7
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作者 张熙贵 王涛 +2 位作者 夏保佳 钦佩 徐乃欣 《燃料化学学报》 EI CAS CSCD 北大核心 2003年第5期411-414,共4页
通过液相共沉积技术在PEM燃料电池氧电极的Pt C电催化剂中引入了Ni和Co两种助催化元素。经氧电极极化实验证明,这种新的电催化剂提高了氧的阴极还原的催化活性。当Ni和Co含量的质量分数分别为0 8%和1%时(以碳为基准),电催化活性较佳。SE... 通过液相共沉积技术在PEM燃料电池氧电极的Pt C电催化剂中引入了Ni和Co两种助催化元素。经氧电极极化实验证明,这种新的电催化剂提高了氧的阴极还原的催化活性。当Ni和Co含量的质量分数分别为0 8%和1%时(以碳为基准),电催化活性较佳。SEM和TEM测试结果表明,Ni、Co助催化元素的引入有利于Pt在载体碳上的分散,减小了Pt的颗粒大小。经过96h的恒流极化测试,电催化剂的活性没有明显的变化,显示稳定性良好。 展开更多
关键词 PEM燃料电池 电催化剂 助催化元素 氧电极 活性
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快速制备高负载量高分散Pt/C催化剂的研究 被引量:6
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作者 田植群 简弃非 +1 位作者 谢方艳 沈培康 《功能材料》 EI CAS CSCD 北大核心 2004年第2期197-199,共3页
 一种经过优化的快速、简单、方便制备方法用于纳米Pt/C催化剂的制备,并采用比表面分析(BET)、透射电镜(TEM)和X射线衍射(XRD)等分析技术对催化剂进行了表征。研究结果表明,该法可一次性快速制备贵金属负载量>40%的Pt/C催化剂,催化...  一种经过优化的快速、简单、方便制备方法用于纳米Pt/C催化剂的制备,并采用比表面分析(BET)、透射电镜(TEM)和X射线衍射(XRD)等分析技术对催化剂进行了表征。研究结果表明,该法可一次性快速制备贵金属负载量>40%的Pt/C催化剂,催化剂具有高比表面积、Pt粒子粒度小、分布窄(平均在3~5nm之间)的特点,并且在VulcanXC 72炭载体上高度分散。 展开更多
关键词 微波 纳米材料 电催化剂 燃料电池 制备 比表面分析 TEM XRD
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用电—多相催化新技术处理化肥厂工业废水 被引量:6
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作者 谢茂松 王学林 +5 位作者 徐桂芬 杨旭 吴鸣 孙承林 韩玉志 韩新茂 《工业水处理》 CAS CSCD 2001年第9期15-17,共3页
电—多相催化作用新技术是针对某种工业废水 ,研制出高效的催化剂 ,在其上施加一定的电压 ,于常温常压下处理废水 ,就能达到COD减少 ,色度降低的效果。该技术处理废水的范围广 ,效率高。作者介绍了电—多相催化新技术的特点及用来处理... 电—多相催化作用新技术是针对某种工业废水 ,研制出高效的催化剂 ,在其上施加一定的电压 ,于常温常压下处理废水 ,就能达到COD减少 ,色度降低的效果。该技术处理废水的范围广 ,效率高。作者介绍了电—多相催化新技术的特点及用来处理恒昌化肥厂工业废水 。 展开更多
关键词 电解化 电-多相催化 化肥厂 工业废水 废水处理
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直接乙醇燃料电池阳极催化材料的研究进展 被引量:10
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作者 罗彬 周德璧 +3 位作者 赵大鹏 刘军 王珏 王俊杰 《材料导报》 EI CAS CSCD 北大核心 2007年第F11期288-291,共4页
评述了直接乙醇燃料电池阳极催化剂研究过程中存在的主要问题,简述了DEFC阳极催化荆的电催化氧化反应机理,概述了目前研究的主要成就,并对今后直接乙醇燃料电池阳极催化材料发展方向进行了展望。
关键词 直接乙醇燃料电池 阳极电催化剂 乙醇氧化 电化学氧化机理
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石墨烯负载电催化剂的研究进展 被引量:5
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作者 李志扬 王小美 +2 位作者 倪红军 葛禹锡 朱昱 《现代化工》 CAS CSCD 北大核心 2013年第6期46-49,共4页
石墨烯由于其独特的平面结构、较大的比表面积和良好的导电性能,作为电催化剂的载体被应用于燃料电池领域。综述了以石墨烯为载体,负载一元贵金属、二元合金、氧化物、多元复合的电催化剂的研究进展,分析了各种电催化剂的催化活性,对石... 石墨烯由于其独特的平面结构、较大的比表面积和良好的导电性能,作为电催化剂的载体被应用于燃料电池领域。综述了以石墨烯为载体,负载一元贵金属、二元合金、氧化物、多元复合的电催化剂的研究进展,分析了各种电催化剂的催化活性,对石墨烯在燃料电池领域未来的发展前景进行了展望。 展开更多
关键词 石墨烯 燃料电池 载体 电催化剂
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二甲醚电氧化及其阳极催化剂研究 被引量:8
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作者 邵玉艳 尹鸽平 +1 位作者 高云智 赵静 《无机化学学报》 SCIE CAS CSCD 北大核心 2004年第12期1453-1458,共6页
Anode electro-catalysts for direct dimethyl-ether fuel cell (DDFC), Pt/C, PtRu/C (1∶1) and PtSn/C (3∶2), were prepared by chemical impregnation-reductio n method with formaldehyde as the reductant. DME electro-oxida... Anode electro-catalysts for direct dimethyl-ether fuel cell (DDFC), Pt/C, PtRu/C (1∶1) and PtSn/C (3∶2), were prepared by chemical impregnation-reductio n method with formaldehyde as the reductant. DME electro-oxidation and adsorptio n at Pt electrode and Pt electro-catalysts were investigated by Cyclic Voltammet ry(CV), Quasi-steady state polarization and Gas Chromatography(GC). CV showed th at there were two current peaks of DME electro-oxidation at Pt electrode around 0.8V (vs RHE); DME was adsorbed at Pt electrode more weakly and slowly than oxyg en, methanol, even hydrogen; the onset potential of DME oxidation was 50mV less than that of methanol, and DME peak potential 110 mV lower, thus more advantageo us for using in fuel cells than methanol. GC showed that small amount of HCHO wa s generated during DME electro-oxidation. The mechanism of DME electro-oxidation was proposed. Among the three electro-catalysts (Pt/C, PtRu/C and PtSn/C), Pt a lloy catalysts, especially PtRu/C, showed a higher performance toward DME electr o-oxidation, as in the case of methanol. Temperature experiments showed that bot h DME electro-oxidation and adsorption on Pt and Pt alloy catalysts were favored with increased temperature. 展开更多
关键词 二甲醚 电氧化行为 阳极催化剂 聚合物电解质膜燃料电池 吸附行为
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