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Stellated Ag-Pt bimetallic nanoparticles: An effective platform for catalytic activity tuning
Alternative TitleSci Rep
Liu, Hui1,2; Ye, Feng1; Yao, Qiaofeng3; Cao, Hongbin1; Xie, Jianping3; Lee, Jim Yang3; Yang, Jun1
2014-02-05
Source PublicationSCIENTIFIC REPORTS
ISSN2045-2322
Volume4Issue:1
AbstractThe usefulness of Pt-based nanomaterials for catalysis can be greatly enhanced by coupling morphology engineering to the strategic presence of a second or even third metal. Here we demonstrate the design and preparation of stellated Ag-Pt bimetallic nanoparticles where significant activity difference between the methanol oxidation reaction (MOR) and the oxygen reduction reaction (ORR) may be realized by relegating Ag to the core or by hollowing out the core. In particular the stellated Pt surface, with an abundance of steps, edges, corner atoms, and {111} facets, is highly effective for the ORR but is ineffective for MOR. MOR activity is only observed in the presence of a Ag core through electronic coupling to the stellated Pt shell. The bimetallic Ag-Pt stellates therefore demonstrate the feasibility of tuning a Pt surface for two very different structure sensitive catalytic reactions. Stellated bimetallics may therefore be an effective platform for highly tunable catalyst designs.; The usefulness of Pt-based nanomaterials for catalysis can be greatly enhanced by coupling morphology engineering to the strategic presence of a second or even third metal. Here we demonstrate the design and preparation of stellated Ag-Pt bimetallic nanoparticles where significant activity difference between the methanol oxidation reaction (MOR) and the oxygen reduction reaction (ORR) may be realized by relegating Ag to the core or by hollowing out the core. In particular the stellated Pt surface, with an abundance of steps, edges, corner atoms, and {111} facets, is highly effective for the ORR but is ineffective for MOR. MOR activity is only observed in the presence of a Ag core through electronic coupling to the stellated Pt shell. The bimetallic Ag-Pt stellates therefore demonstrate the feasibility of tuning a Pt surface for two very different structure sensitive catalytic reactions. Stellated bimetallics may therefore be an effective platform for highly tunable catalyst designs.
KeywordSuperior Electrocatalytic Activity Shape-controlled Synthesis Oxygen-reduction Single-crystal Noble-metals Nanocrystals Nanodendrites Oxidation Heteronanostructures Enhancement
SubtypeArticle
WOS HeadingsScience & Technology
DOI10.1038/srep03969
URL查看原文
Indexed BySCI
Language英语
WOS KeywordSUPERIOR ELECTROCATALYTIC ACTIVITY ; SHAPE-CONTROLLED SYNTHESIS ; OXYGEN-REDUCTION ; SINGLE-CRYSTAL ; NOBLE-METALS ; NANOCRYSTALS ; NANODENDRITES ; OXIDATION ; HETERONANOSTRUCTURES ; ENHANCEMENT
WOS Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
WOS IDWOS:000331220900003
Citation statistics
Cited Times:61[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/8212
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Natl Univ Singapore, Dept Chem & Biomol Engn, Singapore 119260, Singapore
Recommended Citation
GB/T 7714
Liu, Hui,Ye, Feng,Yao, Qiaofeng,et al. Stellated Ag-Pt bimetallic nanoparticles: An effective platform for catalytic activity tuning[J]. SCIENTIFIC REPORTS,2014,4(1).
APA Liu, Hui.,Ye, Feng.,Yao, Qiaofeng.,Cao, Hongbin.,Xie, Jianping.,...&Yang, Jun.(2014).Stellated Ag-Pt bimetallic nanoparticles: An effective platform for catalytic activity tuning.SCIENTIFIC REPORTS,4(1).
MLA Liu, Hui,et al."Stellated Ag-Pt bimetallic nanoparticles: An effective platform for catalytic activity tuning".SCIENTIFIC REPORTS 4.1(2014).
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