电催化剂
塔菲尔方程
过电位
材料科学
聚苯胺
石墨烯
磷化物
化学工程
纳米颗粒
钴
无机化学
电化学
电解质
纳米技术
金属
电极
化学
复合材料
冶金
物理化学
聚合物
工程类
聚合
作者
Jingwen Ma,Min Wang,Guangyu Lei,Guoliang Zhang,Fengbao Zhang,Wenchao Peng,Yang Li
出处
期刊:Small
[Wiley]
日期:2017-11-17
卷期号:14 (2)
被引量:123
标识
DOI:10.1002/smll.201702895
摘要
Abstract The development of highly efficient and durable non‐noble metal electrocatalysts for the hydrogen evolution reaction (HER) is significant for clean and renewable energy research. This work reports the synthesis of N‐doped graphene nanosheets supported N‐doped carbon coated cobalt phosphide (CoP) nanoparticles via a pyrolysis and a subsequent phosphating process by using polyaniline. The obtained electrocatalyst exhibits excellent electrochemical activity for HER with a small overpotential of −135 mV at 10 mA cm −2 and a low Tafel slope of 59.3 mV dec −1 in 0.5 m H 2 SO 4 . Additionally, the encapsulation of N‐doped carbon shell prevents CoP nanoparticles from corrosion, exhibiting good stability after 14 h operation. Moreover, the as‐prepared electrocatalyst also shows outstanding activity and stability in basic and neutral electrolytes.
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