Coating Pt-Ni Octahedra with Ultrathin Pt Shells to Enhance the Durability without Compromising the Activity toward Oxygen Reduction

doi:10.1002/cssc.201600566

	Coating Pt-Ni Octahedra with Ultrathin Pt Shells to Enhance the Durability without Compromising the Activity toward Oxygen Reduction
	Bao, Shixiong 4,5; Park, Jinho 1; Liu, Jingyue 2,3; Peng, Hsin-Chieh 4,5; Figueroa-Cosme, Legna 1; Miao, Shu 3; Choi, Sang-Il 4,5,6; Yang, Xuan 4,5; Xia, Younan 1,4,5
刊名	CHEMSUSCHEM
	2016-08-23
卷号	9 期号:16 页码:2209-2215
关键词	Electrochemistry Layered Compounds Nickel Platinum Reduction
ISSN号	1864-5631
DOI	10.1002/cssc.201600566
文献子类	Article
英文摘要	We describe a new strategy to enhance the catalytic durability of Pt-Ni octahedral nanocrystals in the oxygen reduction reaction (ORR) by conformally depositing an ultrathin Pt shell on the surface. The Pt-Ni octahedra were synthesized according to a protocol reported previously and then employed directly as seeds for the conformal deposition of ultrathin Pt shells by introducing a Pt precursor dropwise at 200 degrees C. The amount of Pt precursor was adjusted relative to the number of Pt-Ni octahedra involved to obtain Pt-Ni@Pt-1.5L octahedra of 12nm in edge length for the systematic evaluation of their chemical stability and catalytic durability compared to Pt-Ni octahedra. Specifically, we compared the elemental compositions of the octahedra before and after treatment with acetic and sulfuric acids. We also examined their electrocatalytic stability toward the ORR through an accelerated durability test by using a rotating disk electrode method. Even after treatment with sulfuric acid for 24h, the Pt-Ni@Pt-1.5L octahedra maintained their original Ni content, whereas 11% of the Ni was lost from the Pt-Ni octahedra. After 10000cycles of ORR, the mass activity of the Pt-Ni octahedra decreased by 75%, whereas the Pt-Ni@Pt-1.5L octahedra only showed a 25% reduction.
WOS关键词	SHAPE-CONTROLLED SYNTHESIS ; BY-LAYER DEPOSITION ; ELECTROCATALYTIC PROPERTIES ; PLATINUM ; CATALYSTS ; NANOCRYSTALS ; PD ; NANOPARTICLES ; ICOSAHEDRA ; SURFACES
WOS研究方向	Chemistry
语种	英语
出版者	WILEY-V C H VERLAG GMBH
WOS记录号	WOS:000383267600026
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/170226]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
通讯作者	Xia, Younan
作者单位	1.Georgia Inst Technol, Sch Chem & Biochem, Atlanta, GA 30332 USA 2.Arizona State Univ, Dept Phys, Tempe, AZ 85287 USA 3.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China 4.Georgia Inst Technol, Wallace H Coulter Dept Biomed Engn, Atlanta, GA 30332 USA 5.Emory Univ, Atlanta, GA 30332 USA 6.Kyungpook Natl Univ, Dept Chem, Daegu 702701, South Korea
推荐引用方式 GB/T 7714	Bao, Shixiong,Park, Jinho,Liu, Jingyue,et al. Coating Pt-Ni Octahedra with Ultrathin Pt Shells to Enhance the Durability without Compromising the Activity toward Oxygen Reduction[J]. CHEMSUSCHEM,2016,9(16):2209-2215.
APA	Bao, Shixiong.,Park, Jinho.,Liu, Jingyue.,Peng, Hsin-Chieh.,Figueroa-Cosme, Legna.,...&Xia, Younan.(2016).Coating Pt-Ni Octahedra with Ultrathin Pt Shells to Enhance the Durability without Compromising the Activity toward Oxygen Reduction.CHEMSUSCHEM,9(16),2209-2215.
MLA	Bao, Shixiong,et al."Coating Pt-Ni Octahedra with Ultrathin Pt Shells to Enhance the Durability without Compromising the Activity toward Oxygen Reduction".CHEMSUSCHEM 9.16(2016):2209-2215.