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Core-shell Pt modified Pd/C as an active and durable electrocatalyst for the oxygen reduction reaction in PEMFCs
Zhang, Geng1,2; Shao, Zhi-Gang1; Lu, Wangting1,2; Xie, Feng1,2; Xiao, Hui1,2; Qin, Xiaoping1; Yi, Baolian1
关键词Proton Exchange Membrane Fuel Cell Oxygen Reduction Electrocatalyst Core-shell Platinum Palladium
刊名APPLIED CATALYSIS B-ENVIRONMENTAL
2013-03-27
DOI10.1016/j.apcatb.2012.11.029
132页:183-194
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences ; Technology
类目[WOS]Chemistry, Physical ; Engineering, Environmental ; Engineering, Chemical
研究领域[WOS]Chemistry ; Engineering
关键词[WOS]PLATINUM-MONOLAYER ELECTROCATALYSTS ; MEMBRANE FUEL-CELLS ; METHANOL OXIDATION ; CATALYTIC-ACTIVITY ; BIMETALLIC CORE ; NANOPARTICLES ; ALLOY ; STABILITY ; NANOCRYSTALS ; OVERGROWTH
英文摘要A series of Pt modified Pd/C catalysts (Pt/Pd/C) with different Pt/Pd molar ratio (Pt:Pd = 1:4, 1:2 and 1:1) are synthesized by a chemical reduction method for oxygen reduction reaction (ORR). X-ray diffraction (XRD), transmission electron microscope (TEM) and cyclic voltammetry (CV) measurements confirm that Pt is deposited on the Pd nanoparticles and the Pt/Pd/C catalysts have a Pd-core@Pt-shell structure. In the half cell testing, the catalytic ORR activity of Pt-1/Pd-2/C and Pt-1/Pd-4/C are superior to commercial Pt/C. Moreover, the electrochemical durability to potential cycling of Pt-1/Pd-2/C and Pt-1/Pd-1/C catalysts is better than Pt/C catalysts. The improved durability is believed to be associated with the dissolution of Pd and the corresponding structure transformation from core-shell structure to Pt-Pd alloy with Pt rich surface. The structure change is confirmed by TEM, CV, XRD and X-ray photoelectron spectroscopy (XPS). In addition, the electrochemical active surface area (ECSA) loss and polarization behavior in the single cell testing also suggest that the Pt/Pd/C show a much better durability than Pt/C catalysts. Similarly, the dissolution of Pd is observed by CV and scanning electron microscope-energy dispersive X-ray spectra (SEM-EDX). The Pt/Pd/C electrocatalysts have high ORR activity and this high activity can be further improved during potential cycling, that is, the activity and durability can be obtained simultaneously. This Pd-core@Pt-shell structure allows for the development of highly active and durable ORR electrocatalysts, with potential for the application in proton exchange membrane fuel cells (PEMPCs). (C) 2012 Published by Elsevier B.V.
语种英语
WOS记录号WOS:000315369700021
引用统计
被引频次:47[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/321008/137744
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, Fuel Cell Syst & Engn Grp, Dalian, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing, Peoples R China
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Zhang, Geng,Shao, Zhi-Gang,Lu, Wangting,et al. Core-shell Pt modified Pd/C as an active and durable electrocatalyst for the oxygen reduction reaction in PEMFCs[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2013,132:183-194.
APA Zhang, Geng.,Shao, Zhi-Gang.,Lu, Wangting.,Xie, Feng.,Xiao, Hui.,...&Yi, Baolian.(2013).Core-shell Pt modified Pd/C as an active and durable electrocatalyst for the oxygen reduction reaction in PEMFCs.APPLIED CATALYSIS B-ENVIRONMENTAL,132,183-194.
MLA Zhang, Geng,et al."Core-shell Pt modified Pd/C as an active and durable electrocatalyst for the oxygen reduction reaction in PEMFCs".APPLIED CATALYSIS B-ENVIRONMENTAL 132(2013):183-194.
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