Show simple item record

dc.contributor.authorZhang, Hui(Zhejiang Univ, State Key Lab Silicon Mat)
dc.contributor.authorJin, Mingshang
dc.contributor.authorWang, Jinguo(Univ Texas Dallas, Dept Mat Sci)
dc.contributor.authorLi, Weiyang(Washington Univ, Dept Biomed Engn)
dc.contributor.authorCamargo, Pedro H. C.(Washington Univ, Dept Biomed Engn)
dc.contributor.authorKim, Moon J.(Univ Texas Dallas, Dept Mat Sci)
dc.contributor.authorYang, Deren(Zhejiang Univ, State Key Lab Silicon Mat)
dc.contributor.authorXie, Zhaoxiong
dc.contributor.author谢兆雄
dc.contributor.authorXia, Younan(Washington Univ, Dept Biomed Engn)
dc.date.accessioned2012-03-11T07:31:04Z
dc.date.available2012-03-11T07:31:04Z
dc.date.issued2011-03-25
dc.identifier.citationJ. Am. Chem. Soc., 2011, 133 (15): 6078–6089zh_CN
dc.identifier.issn0002-7863
dc.identifier.urihttp://dx.doi.org/doi:10.1021/ja201156s
dc.identifier.uriWOS:000290358200082
dc.identifier.urihttps://dspace.xmu.edu.cn/handle/2288/11699
dc.description.abstractThis article describes a systematic study of the galvanic replacement reaction between PtCl(6)(2-) ions and Pd nanocrystals with different shapes, including cubes, cuboctahedrons, and octahedrons. It was found that Br(-) ions played an important role in initiating, facilitating, and directing the replacement reaction. The presence of Br(-) ions led to the selective initiation of galvanic replacement from the {100} facets of Pd nanocrystals, likely due to the preferential adsorption of Br(-) ions on this crystallographic plane. The site-selective galvanic replacement resulted in the formation of Pd-Pt bimetallic nanocrystals with a concave structure owing to simultaneous dissolution of Pd atoms from the {100} facets and deposition of the resultant Pt atoms on the {111} facets. The Pd-Pt concave nanocubes with different weight percentages of Pt at 3.4, 10.4, 19.9, and 34.4 were also evaluated as electrocatalysts for the oxygen reduction reaction (ORR). Significantly, the sample with a 3.4 wt.% of Pt exhibited the largest specific electrochemical surface area and was found to be four times as active as the commercial Pt/C catalyst for the ORR in terms of equivalent Pt mass.zh_CN
dc.description.sponsorshipNSF[DMR-0804088, ECS-0335765]; University of Delaware[DE-FG02-03 ER15468]; Washington University in St. Louis; Zhejiang University; CNMT under MEST, Korea[2010K000336]zh_CN
dc.language.isoenzh_CN
dc.publisherAMER CHEMICAL SOCzh_CN
dc.titleSynthesis of Pd-Pt Bimetallic Nanocrystals with a Concave Structure through a Bromide-Induced Galvanic Replacement Reactionzh_CN
dc.typeArticlezh_CN


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record