Coating Pt-Ni Octahedra with Ultrathin Pt Shells to Enhance the Durability without Compromising the Activity toward Oxygen Reduction
文献类型：期刊论文
| 作者 | Bao, Shixiong4,5; Park, Jinho1; Liu, Jingyue2,3; Peng, Hsin-Chieh4,5; Figueroa-Cosme, Legna1; Miao, Shu3; Choi, Sang-Il4,5,6; Yang, Xuan4,5; Xia, Younan1,4,5 |
| 刊名 | CHEMSUSCHEM
 |
| 出版日期 | 2016-08-23 |
| 卷号 | 9期号:16页码:2209-2215 |
| 关键词 | Electrochemistry Layered Compounds Nickel Platinum Reduction |
| ISSN号 | 1864-5631 |
| DOI | 10.1002/cssc.201600566 |
| 文献子类 | Article |
| 英文摘要 | We describe a new strategy to enhance the catalytic durability of Pt-Ni octahedral nanocrystals in the oxygen reduction reaction (ORR) by conformally depositing an ultrathin Pt shell on the surface. The Pt-Ni octahedra were synthesized according to a protocol reported previously and then employed directly as seeds for the conformal deposition of ultrathin Pt shells by introducing a Pt precursor dropwise at 200 degrees C. The amount of Pt precursor was adjusted relative to the number of Pt-Ni octahedra involved to obtain Pt-Ni@Pt-1.5L octahedra of 12nm in edge length for the systematic evaluation of their chemical stability and catalytic durability compared to Pt-Ni octahedra. Specifically, we compared the elemental compositions of the octahedra before and after treatment with acetic and sulfuric acids. We also examined their electrocatalytic stability toward the ORR through an accelerated durability test by using a rotating disk electrode method. Even after treatment with sulfuric acid for 24h, the Pt-Ni@Pt-1.5L octahedra maintained their original Ni content, whereas 11% of the Ni was lost from the Pt-Ni octahedra. After 10000cycles of ORR, the mass activity of the Pt-Ni octahedra decreased by 75%, whereas the Pt-Ni@Pt-1.5L octahedra only showed a 25% reduction. |
| WOS关键词 | SHAPE-CONTROLLED SYNTHESIS ; BY-LAYER DEPOSITION ; ELECTROCATALYTIC PROPERTIES ; PLATINUM ; CATALYSTS ; NANOCRYSTALS ; PD ; NANOPARTICLES ; ICOSAHEDRA ; SURFACES |
| WOS研究方向 | Chemistry |
| 语种 | 英语 |
| WOS记录号 | WOS:000383267600026 |
| 出版者 | WILEY-V C H VERLAG GMBH |
| 源URL | [http://cas-ir.dicp.ac.cn/handle/321008/170226]  |
| 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 | Xia, Younan |
| 作者单位 | 1.Georgia Inst Technol, Sch Chem & Biochem, Atlanta, GA 30332 USA 2.Arizona State Univ, Dept Phys, Tempe, AZ 85287 USA 3.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China 4.Georgia Inst Technol, Wallace H Coulter Dept Biomed Engn, Atlanta, GA 30332 USA 5.Emory Univ, Atlanta, GA 30332 USA 6.Kyungpook Natl Univ, Dept Chem, Daegu 702701, South Korea |
| 推荐引用方式 GB/T 7714 | Bao, Shixiong,Park, Jinho,Liu, Jingyue,et al. Coating Pt-Ni Octahedra with Ultrathin Pt Shells to Enhance the Durability without Compromising the Activity toward Oxygen Reduction[J]. CHEMSUSCHEM,2016,9(16):2209-2215. |
| APA | Bao, Shixiong.,Park, Jinho.,Liu, Jingyue.,Peng, Hsin-Chieh.,Figueroa-Cosme, Legna.,...&Xia, Younan.(2016).Coating Pt-Ni Octahedra with Ultrathin Pt Shells to Enhance the Durability without Compromising the Activity toward Oxygen Reduction.CHEMSUSCHEM,9(16),2209-2215. |
| MLA | Bao, Shixiong,et al."Coating Pt-Ni Octahedra with Ultrathin Pt Shells to Enhance the Durability without Compromising the Activity toward Oxygen Reduction".CHEMSUSCHEM 9.16(2016):2209-2215. |
入库方式： OAI收割
来源：大连化学物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。