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题名: Urchin-like CoP Nanocrystals as Hydrogen Evolution Reaction and Oxygen Reduction Reaction Dual-Electrocatalyst with Superior Stability
作者: Yang, HC(杨红超); Zhang, YJ(张叶俊); Hu, F(胡峰); Wang, QB(王强斌)
通讯作者: Wang, QB (王强斌)
关键词: Cobalt phosphide ; hydrogen evolution reaction ; oxygen reduction reaction ; electrocatalyst ; durability
刊名: NANO LETTERS
发表日期: 2015
DOI: 10.1021/acs.nanolett.5b03446
卷: 15, 期:11, 页:5
收录类别: SCI
部门归属: 纳米生物医学与安全研究部
英文摘要: High-performance electrocatalysts with superior stability are critically important for their practical applications in hydrogen evolution reaction (HER) and Oxygen reduction reaction (ORR). Herein, we report a facile method to fabricate urchin like CoP nanocrystals (NCs) as E catalyst for both HER and ORR with desirable electrocatalytic activities and long-term stability. The urchin-like CoP NCs with a diameter of 5 mu m were successfully prepared by a hydrothermal reaction following a phosphidation treatment in N-2 atmosphere and present excellent HER catalytic performance with a low onset overpotential of SO mV) a small Tafel slope of 46 mV/decade, and an exceptional low overpotential of similar to 180 mV at a current density of 100 mA cm(-2) with a mass loading density of 0.28 mg/cm(2). Meanwhile, a remarkable ORR catalytic activity was observed with a half-potential of 0.7 V and an onset potential of 0.8 V at 1600 rpm and a scan rate of 5 mV s(-1). More importantly, the urchin-like CoP NCs present superior stability and keep their catalytic activity for at least 10 000 CV cycles for HER in 0.5 M H2SO4 and over 30 000 s for ORR in 0.1 M KOH, which is ascribed to their robust three-dimensional structure. This urchin-like CoP NCs might be a promising replacement to the Pt-based electrocatalysts in water splitting and fuel cells.
语种: 英语
JCR小类分区: 一区
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.sinano.ac.cn/handle/332007/3278
Appears in Collections:纳米生物医学与安全研究部_王强斌团队_期刊论文

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Recommended Citation:
Yang, HC,Zhang, YJ,Hu, F,et al. Urchin-like CoP Nanocrystals as Hydrogen Evolution Reaction and Oxygen Reduction Reaction Dual-Electrocatalyst with Superior Stability[J]. NANO LETTERS,2015,15(11):5.
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