Core@shell nanostructured Au-d@NimPtm for electrochemical oxygen reduction reaction: effect of the core size and shell thickness
文献类型：期刊论文
| 作者 | Zhang, Min1; Miao, Shu2; Xu, Bo-Qing1 |
| 刊名 | CATALYSIS SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2019-09-07 |
| 卷号 | 9期号:17页码:4668-4677 |
| ISSN号 | 2044-4753 |
| DOI | 10.1039/c9cy01056d |
| 通讯作者 | Xu, Bo-Qing(bqxu@mail.tsinghua.edu.cn) |
| 英文摘要 | We showed earlier that using Au nanoparticles of ca. 3.5 nm for the cores to construct core-shell Au@NimPt2 nanostructures can be promising for developing high performance Pt catalysts for the oxygen reduction reaction (ORR) in acidic electrolytes (L.-L. Shen, G.-R. Zhang, S. Miao, J. Liu and B.-Q. Xu, ACS Catal., 2016, 6, 1680-1690). By varying the nanosize of Au cores (d = 2.2-10.3 nm) and the atomic Pt/Au (or Ni/Au) ratio (m = 0.5-6), serial Au-d@NimPtm nanostructures are herein constructed and characterized comprehensively to investigate effects of the Au-core size and NiPt-shell thickness on the Pt activity for the ORR. Maximization of the Pt intrinsic activity (IA(Pt)) to as high as ca. 1.06 mA cm(Pt)(-2) at 0.9 V (vs. RHE) is observed on Au-d@Ni2Pt2 of d = 7.7 and 10.3 nm, 4-fold higher than that of conventional Pt/C (E-TEK). Construction of Au-2.2@NimPtm samples by variation of m demonstrates that the formation of an integrated NiPt-shell of suitable thickness is essential for improving IA(Pt), whose number appears to correlate with the reduction potential of oxidized surface Pt (or surface Pt-O). The integrated NiPt-shell is also shown to be crucial to the catalytic durability of Pt during the ORR. These observations are discussed in terms of surface faceting, strain and electronic effects in association with the Au cores. |
| WOS关键词 | ALLOY NANOCRYSTALS ; NANOPARTICLES ; SURFACE ; ELECTROCATALYSTS ; CATALYSTS ; STABILITY ; ENHANCEMENT ; DURABILITY ; CHALLENGES ; OXIDATION |
| 资助项目 | National Natural Science Foundation[21533004] ; National Basic Research Program of China[2013CB933103] ; Tsinghua University[20131089311] |
| WOS研究方向 | Chemistry |
| 语种 | 英语 |
| 出版者 | ROYAL SOC CHEMISTRY |
| WOS记录号 | WOS:000483698400017 |
| 资助机构 | National Natural Science Foundation ; National Natural Science Foundation ; National Basic Research Program of China ; National Basic Research Program of China ; Tsinghua University ; Tsinghua University ; National Natural Science Foundation ; National Natural Science Foundation ; National Basic Research Program of China ; National Basic Research Program of China ; Tsinghua University ; Tsinghua University ; National Natural Science Foundation ; National Natural Science Foundation ; National Basic Research Program of China ; National Basic Research Program of China ; Tsinghua University ; Tsinghua University ; National Natural Science Foundation ; National Natural Science Foundation ; National Basic Research Program of China ; National Basic Research Program of China ; Tsinghua University ; Tsinghua University |
| 源URL | [http://cas-ir.dicp.ac.cn/handle/321008/173388]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 通讯作者 | Xu, Bo-Qing |
| 作者单位 | 1.Tsinghua Univ, Dept Chem, Key Lab Organ Optoelect & Mol Engn, Innovat Catalysis Program, Beijing 100084, Peoples R China 2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Min,Miao, Shu,Xu, Bo-Qing. Core@shell nanostructured Au-d@NimPtm for electrochemical oxygen reduction reaction: effect of the core size and shell thickness[J]. CATALYSIS SCIENCE & TECHNOLOGY,2019,9(17):4668-4677. |
| APA | Zhang, Min,Miao, Shu,&Xu, Bo-Qing.(2019).Core@shell nanostructured Au-d@NimPtm for electrochemical oxygen reduction reaction: effect of the core size and shell thickness.CATALYSIS SCIENCE & TECHNOLOGY,9(17),4668-4677. |
| MLA | Zhang, Min,et al."Core@shell nanostructured Au-d@NimPtm for electrochemical oxygen reduction reaction: effect of the core size and shell thickness".CATALYSIS SCIENCE & TECHNOLOGY 9.17(2019):4668-4677. |
入库方式： OAI收割
来源：大连化学物理研究所
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