Stellated Ag-Pt bimetallic nanoparticles: An effective platform for catalytic activity tuning | |
Liu, Hui1,2; Ye, Feng1; Yao, Qiaofeng3; Cao, Hongbin1; Xie, Jianping3; Lee, Jim Yang3; Yang, Jun1 | |
刊名 | SCIENTIFIC REPORTS |
2014-02-05 | |
卷号 | 4期号:1 |
关键词 | superior electrocatalytic activity shape-controlled synthesis oxygen-reduction single-crystal noble-metals nanocrystals nanodendrites oxidation heteronanostructures enhancement |
ISSN号 | 2045-2322 |
其他题名 | Sci Rep |
中文摘要 | 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. |
英文摘要 | 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. |
WOS标题词 | Science & Technology |
类目[WOS] | Multidisciplinary Sciences |
研究领域[WOS] | Science & Technology - Other Topics |
关键词[WOS] | SUPERIOR ELECTROCATALYTIC ACTIVITY ; SHAPE-CONTROLLED SYNTHESIS ; OXYGEN-REDUCTION ; SINGLE-CRYSTAL ; NOBLE-METALS ; NANOCRYSTALS ; NANODENDRITES ; OXIDATION ; HETERONANOSTRUCTURES ; ENHANCEMENT |
收录类别 | SCI |
原文出处 | |
语种 | 英语 |
WOS记录号 | WOS:000331220900003 |
公开日期 | 2014-05-06 |
内容类型 | 期刊论文 |
版本 | 出版稿 |
源URL | [http://ir.ipe.ac.cn/handle/122111/8212] |
专题 | 过程工程研究所_研究所(批量导入) |
作者单位 | 1.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 |
推荐引用方式 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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