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dc.contributor.authorLei Zhang
dc.contributor.author张雷
dc.contributor.authorDingqiong Chen
dc.contributor.author陈丁琼
dc.contributor.authorZhiyuan Jiang
dc.contributor.author江智渊
dc.contributor.authorJiawei Zhang
dc.contributor.author张嘉伟
dc.contributor.authorShuifen Xie
dc.contributor.author谢水奋
dc.contributor.authorQin Kuang
dc.contributor.authorZhaoxiong Xie
dc.contributor.author谢兆雄
dc.contributor.authorLansun Zheng
dc.contributor.author郑兰荪
dc.date.accessioned2012-07-02T06:58:51Z
dc.date.available2012-07-02T06:58:51Z
dc.date.issued2012-03
dc.identifier.citationNANO RESEARCH,2012,5(3):181-189zh_CN
dc.identifier.issn1998-0124
dc.identifier.urihttps://dspace.xmu.edu.cn/handle/2288/13100
dc.description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.cnzh_CN
dc.description.abstractPlatinum (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}.zh_CN
dc.description.sponsorshipNational 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 2009HZ0002-1zh_CN
dc.language.isoenzh_CN
dc.publisherTSINGHUA UNIV PRESSzh_CN
dc.subjectPt nanocrystalszh_CN
dc.subjectsurface structurezh_CN
dc.subjecthigh-index facetszh_CN
dc.subjectstructure-property relationshipzh_CN
dc.subjectelectrocatalysiszh_CN
dc.subjectcrystal growthzh_CN
dc.titleFacile syntheses and enhanced electrocatalytic activities of Pt nanocrystals with {hkk} high-index surfaceszh_CN
dc.typeArticlezh_CN


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