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	Facile syntheses and enhanced electrocatalytic activities of Pt nanocrystals with {hkk} high-index surfaces
	Lei Zhang ; Zhang L(张雷) ; Dingqiong Chen ; Chen DQ(陈丁琼) ; Zhiyuan Jiang ; Jiang ZY(江智渊) ; Jiawei Zhang ; Zhang JW(张嘉伟) ; Shuifen Xie ; Xie SF(谢水奋) ; Qin Kuang ; Zhaoxiong Xie ; Xie ZX(谢兆雄) ; Lansun Zheng ; Zheng LS(郑兰荪)
	2012-03
关键词	Pt nanocrystals surface structure high-index facets structure-property relationship electrocatalysis crystal growth
英文摘要	通讯作者地址: Jiang, ZY (通讯作者),Xiamen Univ, Dept Chem, Coll Chem & Chem Engn, Xiamen 361005, Peoples R China 地址: 1. Xiamen Univ, Dept Chem, Coll Chem & Chem Engn, Xiamen 361005, Peoples R China 2. Xiamen Univ, State Key Lab Phys Chem Solid Surfaces, Coll Chem & Chem Engn, Xiamen 361005, Peoples R China 电子邮件地址: zyjiang@xmu.edu.cn; zxxie@xmu.edu.cn; Platinum (Pt) is an outstanding catalyst for many important industrial products. Because of its high cost and scarce reserves, it is very important to improve the performance of Pt catalysts. As the metal nanocrystals (NCs) with high-index surfaces usually show very good catalytic activity because of their high density of atomic steps and kinks, the preparation of Pt NCs with high-index facets has become a very important and hot research topic recently. In this article, we report a facile synthesis of high-yield Pt NCs with a series of {hkk} high-index facets including {211} and {411} via a solvothermal method using Pt(II) acetylacetonate as the Pt source, 1-octylamine as the solvent and capping agent, and formaldehyde as an additional surface structure regulator. Multipod Pt NCs with dominant {211} side surfaces were produced without formaldehyde, while concave Pt NCs with dominant {411} surfaces formed under the influence of formaldehyde. By analyzing the products by IR spectroscopy, we found the presence of CO on the surface of concave Pt NCs with {411} surfaces prepared from the solution containing formaldehyde. It was concluded that amine mainly stabilized the monoatomic step edges, resulting in the {211} exposed surface; with addition of formaldehyde, it decomposed into CO, leading to the formation of {411} surfaces by the additional adsorption of the CO on the {100} terraces. In addition, it was found that the as-prepared Pt NCs with high-index {211} and {411} surfaces exhibited much better catalytic activity in the electro-oxidation of ethanol than a commercial Pt/C catalyst or Pt nanocubes with low-index {100} surfaces, and the catalytic activities of Pt crystal facets decreased in the sequence {411}>{211}>{100}.; National Basic Research Program of China 2011CBA00508 National Natural Science Foundation of China 21131005 21021061 21073145 21171141 National Fund for Fostering Talents of Basic Science J1030415 Key Scientific Project of Fujian Province of China 2009HZ0002-1
语种	英语
出版者	TSINGHUA UNIV PRESS
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/13100]
专题	化学化工－已发表论文
推荐引用方式 GB/T 7714	Lei Zhang,Zhang L,Dingqiong Chen,et al. Facile syntheses and enhanced electrocatalytic activities of Pt nanocrystals with {hkk} high-index surfaces[J],2012.
APA	Lei Zhang.,张雷.,Dingqiong Chen.,陈丁琼.,Zhiyuan Jiang.,...&郑兰荪.(2012).Facile syntheses and enhanced electrocatalytic activities of Pt nanocrystals with {hkk} high-index surfaces..
MLA	Lei Zhang,et al."Facile syntheses and enhanced electrocatalytic activities of Pt nanocrystals with {hkk} high-index surfaces".(2012).

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