A general and scalable approach to produce nanoporous alloy nanowires with rugged ligaments for enhanced electrocatalysis
文献类型：期刊论文
| 作者 | Du, P.; Liu, X. J.; Wang, J. Q.; Fang, G.; Yao, A. Y.; Wen, Y. R.; Chiang, F. -K.; Gao, J. J.; Qiu, H. -J. |
| 刊名 | JOURNAL OF MATERIALS CHEMISTRY A
 |
| 出版日期 | 2018 |
| 卷号 | 6期号:26页码:12541-12550 |
| 关键词 | Oxygen Reduction Reaction High Catalytic-activity One-pot Synthesis Methanol Oxidation Fuel-cells Pt-skin Platinum Nanoparticles Performance Gold |
| 英文摘要 | Nanoporous metal nanowires with large surface areas, and a high density of defect sites play an important role in catalysis. Here, a general and scalable one-step dealloying strategy is developed to prepare nanoporous alloy nanowires with controllable compositions by manipulating the grain size, structure and composition of bulk Cu-based precursor alloys. We prepared PtCuAu nanoporous nanowires with a diameter of 200-500 nm and tunable composition by dealloying a diluted Pt1Au0.5Cu98.5 single-phase alloy with nanoscale column-like-structured grains. Material characterization suggests that the formation of separated nanowires is due to the large-scale shrinkage of the column-structured grains during dealloying of Cu, which also generates ultrafine nanopores and rugged alloy ligaments with a high density of defect sites in the nanowires. When used as a cathodic catalyst for the oxygen reduction reaction (ORR), the PtCuAu nanoporous nanowires exhibit a composition-dependent catalytic performance. The 8.0 M HNO3 dealloyed sample exhibits a specific activity of 4.12 mA cm(-2) at 0.9 V, which is more than 14 times that of commercial Pt/C. With the advantages of being easy to scale up, highly reproducible and controllable, the fabrication strategy holds great promise to prepare nanocatalysts for fuel cells. |
| 学科主题 | Materials Science ; Physics |
| 语种 | 英语 |
| 公开日期 | 2018-12-04 |
| 源URL | [http://ir.nimte.ac.cn/handle/174433/17318]  |
| 专题 | 2018专题 |
| 推荐引用方式 GB/T 7714 | Du, P.,Liu, X. J.,Wang, J. Q.,et al. A general and scalable approach to produce nanoporous alloy nanowires with rugged ligaments for enhanced electrocatalysis[J]. JOURNAL OF MATERIALS CHEMISTRY A,2018,6(26):12541-12550. |
| APA | Du, P..,Liu, X. J..,Wang, J. Q..,Fang, G..,Yao, A. Y..,...&Qiu, H. -J..(2018).A general and scalable approach to produce nanoporous alloy nanowires with rugged ligaments for enhanced electrocatalysis.JOURNAL OF MATERIALS CHEMISTRY A,6(26),12541-12550. |
| MLA | Du, P.,et al."A general and scalable approach to produce nanoporous alloy nanowires with rugged ligaments for enhanced electrocatalysis".JOURNAL OF MATERIALS CHEMISTRY A 6.26(2018):12541-12550. |
入库方式： OAI收割
来源：宁波材料技术与工程研究所
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