中国科学院大连化学物理研究所机构知识库
Advanced  
DICP OpenIR  > 中国科学院大连化学物理研究所  > 期刊论文
题名: Core-shell Pt modified Pd/C as an active and durable electrocatalyst for the oxygen reduction reaction in PEMFCs
作者: 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
发表日期: 2013-03-27
DOI: 10.1016/j.apcatb.2012.11.029
卷: 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
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.
关键词[WOS]: PLATINUM-MONOLAYER ELECTROCATALYSTS ;  MEMBRANE FUEL-CELLS ;  METHANOL OXIDATION ;  CATALYTIC-ACTIVITY ;  BIMETALLIC CORE ;  NANOPARTICLES ;  ALLOY ;  STABILITY ;  NANOCRYSTALS ;  OVERGROWTH
语种: 英语
WOS记录号: WOS:000315369700021
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/137744
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

Files in This Item:

There are no files associated with this item.


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

Recommended Citation:
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.
Service
 Recommend this item
 Sava as my favorate item
 Show this item's statistics
 Export Endnote File
Google Scholar
 Similar articles in Google Scholar
 [Zhang, Geng]'s Articles
 [Shao, Zhi-Gang]'s Articles
 [Lu, Wangting]'s Articles
CSDL cross search
 Similar articles in CSDL Cross Search
 [Zhang, Geng]‘s Articles
 [Shao, Zhi-Gang]‘s Articles
 [Lu, Wangting]‘s Articles
Related Copyright Policies
Null
Social Bookmarking
  Add to CiteULike  Add to Connotea  Add to Del.icio.us  Add to Digg  Add to Reddit 
所有评论 (0)
暂无评论
 
评注功能仅针对注册用户开放,请您登录
您对该条目有什么异议,请填写以下表单,管理员会尽快联系您。
内 容:
Email:  *
单位:
验证码:   刷新
您在IR的使用过程中有什么好的想法或者建议可以反馈给我们。
标 题:
 *
内 容:
Email:  *
验证码:   刷新

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.

 

 

Valid XHTML 1.0!
Powered by CSpace