Kirkendall Effect and Lattice Contraction in Nanocatalysts: A New Strategy to Enhance Sustainable Activity
文献类型：期刊论文
| 作者 | Wang, JX ; Ma, C ; Choi, YM ; Su, D ; Zhu, YM ; Liu, P ; Si, R ; Vukmirovic, MB ; Zhang, Y ; Adzic, RR |
| 刊名 | JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
 |
| 出版日期 | 2011 |
| 卷号 | 133期号:34页码:13551 |
| ISSN号 | 0002-7863 |
| 关键词 | OXYGEN REDUCTION ELECTROCATALYSTS DEALLOYED PT-CU AB-INITIO FUEL-CELLS PLATINUM NANOPARTICLES ALLOYS HOLLOW DISSOLUTION STABILITY |
| 通讯作者 | Wang, JX: Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. |
| 中文摘要 | Core-shell nanoparticles increasingly are found to be effective in enhancing catalytic performance through the favorable influence of the core materials on the active components at the surface. Yet, sustaining high activities under operating conditions often has proven challenging. Here we explain how differences in the components' diffusivity affect the formation and stability of the core-shell and hollow nanostructures, which we ascribe to the Kirkendall effect. Using Ni nanoparticles as the templates, we fabricated compact and smooth Pt hollow nanocrystals that exhibit a sustained enhancement in Pt mass activity for oxygen reduction in acid fuel cells. This is achieved by the hollow-induced lattice contraction, high surface area per mass, and oxidation-resistant surface morphology-a new route for enhancing both the catalysts' activity and durability. The results indicate challenges and opportunities brought by the nanoscale Kirkendall effect for designing, at the atomic level, nanostructures with a wide range of novel properties. |
| 资助信息 | U.S. Department of Energy, Basic Energy Sciences, Divisions of Chemical and Material Sciences, Material Sciences and Engineering Division [DE-AC02-98CH10886] |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-09-18 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/40475]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Wang, JX,Ma, C,Choi, YM,et al. Kirkendall Effect and Lattice Contraction in Nanocatalysts: A New Strategy to Enhance Sustainable Activity[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,2011,133(34):13551. |
| APA | Wang, JX.,Ma, C.,Choi, YM.,Su, D.,Zhu, YM.,...&Adzic, RR.(2011).Kirkendall Effect and Lattice Contraction in Nanocatalysts: A New Strategy to Enhance Sustainable Activity.JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,133(34),13551. |
| MLA | Wang, JX,et al."Kirkendall Effect and Lattice Contraction in Nanocatalysts: A New Strategy to Enhance Sustainable Activity".JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 133.34(2011):13551. |
入库方式： OAI收割
来源：物理研究所
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