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Promoting Effect of Ni in PtNi Bimetallic Electrocatalysts for the Methanol Oxidation Reaction in Alkaline Media: Experimental and Density Functional Theory Studies
Jiang, Qian1,2; Jiang, Luhua1; Hou, Hongying1; Qi, Jing1,2; Wang, Suli1; Sun, Gongquan1
刊名JOURNAL OF PHYSICAL CHEMISTRY C
2010-11-25
DOI10.1021/jp1039755
114期:46页:19714-19722
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences ; Technology
类目[WOS]Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
研究领域[WOS]Chemistry ; Science & Technology - Other Topics ; Materials Science
关键词[WOS]EFFECTIVE CORE POTENTIALS ; FUEL-CELL ; CARBON-MONOXIDE ; OXYGEN REDUCTION ; MOLECULAR CALCULATIONS ; PLATINUM-ELECTRODES ; EXCHANGE MEMBRANE ; AD-ATOMS ; ELECTROOXIDATION ; ADSORPTION
英文摘要Carbon-supported bimetallic Pt(m)Ni(n) electrocatalysts with different Pt/Ni atomic ratios were synthesized through a modified polyol process. The as-prepared electrocatalysts were characterized by X-ray diffraction, transmission electron microscopy, voltammetry techniques, and single-cell tests. It was revealed that the Pt(m)Ni(n) bimetallic nanoparticles were uniformly distributed on carbon supports with average diameters of about 3 nm. Pt and Ni were partially alloyed, indicated by the decreased Pt lattice constants compared with that of pure Pt. The results of the electrochemical measurements showed that the Pt(m)Ni(n)/C catalysts, compared with the Pt/C, have superior specific activity toward the methanol electrooxidation reaction (MOR) in alkaline media as well as a higher power density in a direct methanol fuel cell test with the Pt(3)Ni(1)/C as the anode catalyst. Density functional theory studies further revealed that the electronic structure of Pt was modified by Ni due to the charge transfer from Ni to Pt atoms in Pt(m)Ni(n) clusters, leading to a weakened CO adsorption on Pt(m)Ni(n) binary clusters than on Pt itself. This provides an explanation for the enhanced MOR activity of the Pt(m)Ni(n)/C catalysts.
语种英语
WOS记录号WOS:000284287900023
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被引频次:79[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/142203
专题中国科学院大连化学物理研究所
作者单位1.Chinese Acad Sci, Dalian Inst Chem Phys, Direct Alcohol Fuel Cell Lab, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China
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Jiang, Qian,Jiang, Luhua,Hou, Hongying,et al. Promoting Effect of Ni in PtNi Bimetallic Electrocatalysts for the Methanol Oxidation Reaction in Alkaline Media: Experimental and Density Functional Theory Studies[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2010,114(46):19714-19722.
APA Jiang, Qian,Jiang, Luhua,Hou, Hongying,Qi, Jing,Wang, Suli,&Sun, Gongquan.(2010).Promoting Effect of Ni in PtNi Bimetallic Electrocatalysts for the Methanol Oxidation Reaction in Alkaline Media: Experimental and Density Functional Theory Studies.JOURNAL OF PHYSICAL CHEMISTRY C,114(46),19714-19722.
MLA Jiang, Qian,et al."Promoting Effect of Ni in PtNi Bimetallic Electrocatalysts for the Methanol Oxidation Reaction in Alkaline Media: Experimental and Density Functional Theory Studies".JOURNAL OF PHYSICAL CHEMISTRY C 114.46(2010):19714-19722.
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