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题名: Facile Synthesis of Carbon Supported Pd3Au@Super-Thin Pt Core/Shell Electrocatalyst with a Remarkable Activity for Oxygen Reduction
作者: Li, Huanqiao1, 2;  Yao, Rui1, 2;  Wang, Dan1, 2;  He, Jingfang3;  Li, Mingrun1, 2;  Song, Yujiang1, 2
刊名: JOURNAL OF PHYSICAL CHEMISTRY C
发表日期: 2015-02-26
DOI: 10.1021/jp5106168
卷: 119, 期:8, 页:4052-4061
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
英文摘要: Aiming at developing a highly active electrocatalyst with high platinum utilization efficiency, we report a facile synthesis of carbon supported Pd3Au@Pt electrocatalyst by chemical reduction of K2PtCl4, K2PdCl4, and aq NaAuCl4 with ascorbic acid (AA) under ambient conditions in the absence of surfactants. The resultant Pd3Au@Pt/C electrocatalyst comprises of a thin platinum layer less than 1 nm in thickness deposited on the outer surface of Pd3Au alloy core with an average diameter of 3.4 nm. Remarkably, Pd3Au@Pt/C exhibited a high mass activity (MA, 939 mAmg(Pt)(-1)) toward oxygen reduction reaction (ORR), which is 4.6 times that of commercial Pt/C (203 mAmg(Pt)(-1)). The durability of Pd3Au@Pt/C is close to that of commercial Pt/C. According to X-ray diffraction (XRD) patterns, the lattice constant of the Pd3Au alloy supported on carbon is determined to be 3.950 angstrom close to yet slightly larger than that of Pt/C (3.920 angstrom), inducing a lateral tensile strain of the platinum shell. Meanwhile, electrons from the Pd3Au core appear transferred to the platinum shell as evidenced by X-ray photoelectron spectroscopy (XPS). We propose that the lateral tensile strain (geometric effect) and the electron transfer (electronic effect) as well as the high platinum utilization efficiency have contributed to the significantly improved electrocatalytic activity of Pd3Au@Pt/C. The coexistence of the lateral tensile strain and the electron transfer in the electrocatalyst with a high ORR activity has not been reported prior to this study.
关键词[WOS]: PLATINUM-MONOLAYER ELECTROCATALYSTS ;  SHELL NANOPARTICLES ;  PARTICLE-SIZE ;  FORMIC-ACID ;  CORE ;  CATALYST ;  SURFACE ;  ALLOY ;  NANODENDRITES ;  NANOCATALYSTS
语种: 英语
WOS记录号: WOS:000350329300019
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/146078
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, DICP, Dalian Natl Labs Clean Energy DNL, Dalian 116023, Peoples R China
2.Chinese Acad Sci, SKLC, DICP, Dalian 116023, Peoples R China
3.Dalian Univ Technol, Coll Chem Environm & Biol Sci & Technol, Dalian 116024, Peoples R China

Recommended Citation:
Li, Huanqiao,Yao, Rui,Wang, Dan,et al. Facile Synthesis of Carbon Supported Pd3Au@Super-Thin Pt Core/Shell Electrocatalyst with a Remarkable Activity for Oxygen Reduction[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2015,119(8):4052-4061.
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