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题名: Fabrication of a highly dispersed Pd-core@Pt-shell electrocatalyst for the oxygen reduction reaction
作者: Cao, Longsheng1, 2;  Jiang, Shangfeng1, 2;  Zhang, Geng3;  Tang, Xuejun1, 2;  Qin, Xiaoping1;  Shao, Zhigang1;  Yi, Baolian1
关键词: Pd-core@Pt-shell ;  Dissociated hydrogen ;  Oxygen reduction ;  Electrocatalysis ;  Core shell
刊名: CHINESE JOURNAL OF CATALYSIS
发表日期: 2017-07-01
DOI: 10.1016/S1872-2067(17)62840-7
卷: 38, 期:7, 页:1196-1206
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: Core-shell nanostructures have been widely investigated to improve the electrocatalytic performance of platinum. However, organic precursors, surfactants or high temperature are usually necessary during the preparation procedure. Unfortunately, these requirements limit the application of these methods on a large scale. Herein, a Pd-core@Pt-shell nanostructure was fabricated through the reduction of K2PtCl4 by dissociated hydrogen at room temperature without the assistance of either a surfactant or a high-boiling point solvent. The shell thickness of this nanostructure was successfully controlled by varying the amount of K2PtCl4; core-shell nanoparticles with a shell thickness of 0.45, 0.75 and 0.90 nm were obtained, as determined by TEM. The remarkable crystallinity and epitaxial growth of the Pd-core@Pt-shell nanostructure were revealed by HRTEM and EDS. According to ICP and XPS, surface segregation of Pt was established. The impressive ORR performance was attributed to the weak adsorption strength of the OHads species, which resulted from the electron transfer impact between the Pd-core@Pt-shell. The facile and clean preparation method can be used to prepare other core-shell nanostructures under a mild atmosphere. (C) 2017, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
关键词[WOS]: HIGH-PERFORMANCE ELECTROCATALYSTS ;  FUEL-CELLS ;  PLATINUM NANOPARTICLES ;  TRANSITION-METALS ;  SURFACE ;  CATALYSTS ;  CATHODE ;  ALLOYS ;  XPS ;  ELECTROREDUCTION
语种: 英语
WOS记录号: WOS:000405979100011
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/152025
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Fuel Cell Syst & Engn Grp, Dalian 116023, Liaoning, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Huazhong Agr Univ, Coll Sci, Dept Chem, Wuhan 430070, Hubei, Peoples R China

Recommended Citation:
Cao, Longsheng,Jiang, Shangfeng,Zhang, Geng,et al. Fabrication of a highly dispersed Pd-core@Pt-shell electrocatalyst for the oxygen reduction reaction[J]. CHINESE JOURNAL OF CATALYSIS,2017,38(7):1196-1206.
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