Enhanced activity and stability of a Au decorated Pt/PdCo/C electrocatalyst toward oxygen reduction reaction
文献类型：期刊论文
| 作者 | Tang, Qiwen1,2,3; Jiang, Luhua1,2; Jiang, Qian1,2,3; Wang, Suli1,2; Sun, Gongquan1,2 |
| 刊名 | electrochimica acta
 |
| 出版日期 | 2012-08-30 |
| 卷号 | 77页码:104-110 |
| 关键词 | Oxygen reduction Underpotential deposition Gold PdCo electrocatalyst Stability |
| 英文摘要 | carbon-supported pt/pdco and pt/au/pdco catalysts with a low pt loading were prepared by a combined underpotential deposition and galvanic replacement route. the x-ray diffraction results show that after annealing in h-2/ar atmosphere, the alloy degree of pdco is enhanced. the average metal particle size of pdco/c, pdco/c-h, pt/pdco/c and pt/au/pdco/c, characterized by transmission electron microscopy, is about 2.6, 4.1. 5.3 and 5.5 nm, respectively. the electrochemical characterizations show that the pt/pdco/c electrocatalyst exhibits a high activity toward the oxygen reduction reaction (orr) but is unstable in electrochemical environment. after the accelerated aging tests (aat), the electrochemical surface area (ecsa) for the pt/pdco/c catalyst decreases by 48% and the half-wave potential of the orr polarization curve (e-1/2) shifts 35 mv negatively. after decorated by au, both the catalytic activity and stability of the pt/pdco/c catalyst are improved significantly. compared to pt/pdco/c, the e-1/2 for pt/au/pdco/c shifts 22 mv toward higher potentials. after the aat, the ecsa decreases only 26%, and the e-1/2 shifts 13 mv negatively for pt/au/pdco/c. the enhanced catalytic activity and stability should be due to the high resistance to be oxidized for pt and the suppressed oh adsorption on the au-decorated pt surface. crown copyright (c) 2012 published by elsevier ltd. all rights reserved. |
| WOS标题词 | science & technology ; physical sciences |
| 类目[WOS] | electrochemistry |
| 研究领域[WOS] | electrochemistry |
| 关键词[WOS] | core-shell nanoparticles ; electrolyte fuel-cells ; monolayer electrocatalysts ; underpotential deposition ; catalytic-activity ; redox replacement ; carbon support ; cu alloys ; surfaces ; durability |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000307131300016 |
| 公开日期 | 2015-11-10 |
| 源URL | [http://159.226.238.44/handle/321008/138011]  |
| 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 |
| 作者单位 | 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China 2.Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China 3.Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Tang, Qiwen,Jiang, Luhua,Jiang, Qian,et al. Enhanced activity and stability of a Au decorated Pt/PdCo/C electrocatalyst toward oxygen reduction reaction[J]. electrochimica acta,2012,77:104-110. |
| APA | Tang, Qiwen,Jiang, Luhua,Jiang, Qian,Wang, Suli,&Sun, Gongquan.(2012).Enhanced activity and stability of a Au decorated Pt/PdCo/C electrocatalyst toward oxygen reduction reaction.electrochimica acta,77,104-110. |
| MLA | Tang, Qiwen,et al."Enhanced activity and stability of a Au decorated Pt/PdCo/C electrocatalyst toward oxygen reduction reaction".electrochimica acta 77(2012):104-110. |
入库方式： OAI收割
来源：大连化学物理研究所
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