Surface evolution of a Pt-Pd-Au electrocatalyst for stable oxygen reduction
文献类型：期刊论文
| 作者 | Li, Jian2,7; Yin, Hui-Ming2,7; Li, Xi-Bo1; Okunishi, Eiji3; Shen, Yong-Li2,7; He, Jia2,7; Tang, Zhen-Kun1; Wang, Wen-Xin2,7; Yucelen, Emrah4; Li, Chao2,7 |
| 刊名 | NATURE ENERGY
 |
| 出版日期 | 2017-08-01 |
| 卷号 | 2期号:8 |
| 英文摘要 | Core- shell nanocatalysts have demonstrated potential as highly active low-Pt fuel cell cathodes for the oxygen reduction reaction (ORR); however, challenges remain in optimizing their surface and interfacial structures, which often exhibit undesirable structural degradation and poor durability. Here, we construct an unsupported nanoporous catalyst with a Pt- Pd shell of sub-nanometre thickness on Au, which demonstrates an initial ORR activity of 1.140Amg(Pt)(-1) at 0.9V. The activity increases to 1.471Amg(Pt)(-1) after 30,000 potential cycles and is stable over a further 70,000 cycles. Using aberration-corrected scanning transmission electron microscopy and atomically resolved elemental mapping, the origin of the activity change is revealed to be an atomic-scale evolution of the shell from an initial Pt-Pd alloy into a bilayer structure with a Pt-rich trimetallic surface, and finally into a uniform and stable Pt-Pd-Au alloy. This Pt-Pd-Au alloy possesses a suitable configuration for ORR, giving a relatively low free energy change for the final water formation from adsorbed OH intermediate during the reaction. |
| WOS标题词 | Science & Technology ; Technology |
| 类目[WOS] | Energy & Fuels ; Materials Science, Multidisciplinary |
| 研究领域[WOS] | Energy & Fuels ; Materials Science |
| 关键词[WOS] | MONOLAYER ELECTROCATALYSTS ; PLATINUM NANOPARTICLES ; ENHANCED ACTIVITY ; FUEL-CELLS ; ALLOY ; CATALYSTS ; STRAIN ; METAL ; GOLD ; SEGREGATION |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000411264300018 |
| 源URL | [http://cas-ir.dicp.ac.cn/handle/321008/150112]  |
| 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.Beijing Computat Sci Res Ctr, Beijing 100084, Peoples R China 2.Tianjin Univ Technol, Sch Mat Sci & Engn, Ctr Electron Microscopy, Tianjin 300384, Peoples R China 3.JEOL Ltd, 1-2 Musashino,3 Chome Akishima, Tokyo 1968558, Japan 4.FEI Co BV, NanoPort Europe, POB 80066, NL-5600 KA Eindhoven, Netherlands 5.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China 6.Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China 7.Tianjin Univ Technol, Sch Mat Sci & Engn, Tianjin Key Lab Adv Funct Porous Mat, Tianjin 300384, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Jian,Yin, Hui-Ming,Li, Xi-Bo,et al. Surface evolution of a Pt-Pd-Au electrocatalyst for stable oxygen reduction[J]. NATURE ENERGY,2017,2(8). |
| APA | Li, Jian.,Yin, Hui-Ming.,Li, Xi-Bo.,Okunishi, Eiji.,Shen, Yong-Li.,...&Ding, Yi.(2017).Surface evolution of a Pt-Pd-Au electrocatalyst for stable oxygen reduction.NATURE ENERGY,2(8). |
| MLA | Li, Jian,et al."Surface evolution of a Pt-Pd-Au electrocatalyst for stable oxygen reduction".NATURE ENERGY 2.8(2017). |
入库方式： OAI收割
来源：大连化学物理研究所
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