电催化剂
塔菲尔方程
材料科学
磷化物
化学工程
电解质
催化作用
介孔材料
纳米技术
电化学
无机化学
化学
电极
金属
物理化学
生物化学
冶金
工程类
作者
Chaoran Pi,Chao Huang,Yixuan Yang,Hao Song,Xuming Zhang,Yang Zheng,Biao Gao,Jijiang Fu,Paul K. Chu,Kaifu Huo
标识
DOI:10.1016/j.apcatb.2019.118358
摘要
Molybdenum phosphide (MoP) is a promising non-noble-metal electrocatalyst for hydrogen evolution reaction (HER), but coordination of high HER activity and fast HER kinetics is a challenge. Herein, we proposed a highly efficient HER electrocatalyst composed of N-doped carbon-coated porous MoP nanowires ([email protected]) by phosphorization of organic-inorganic Mo3O10(C6H8N)2·2H2O NWs. The [email protected] with mesopores MoP framework and micropores N-doped carbon-coating facilitates the electrolyte/bubbles diffusion and ion/electron transport, owns abundant active sites and smaller adsorption free energy of H (ΔGH*) at the interface boosting the HER performance. Small overpotentials (η10) of 96, 191 and 149 mV with Tafel slopes of 49.2, 95.0 and 61.7 mV dec−1 in acidic, neutural and alkaline solutions were achieved as well as excellent stability, which is better than that of bare MoP NWs and other MoP-based electocatalysts. The results reveal a simple and effective approach to produce inexpensive electrocatalysts with excellent HER properties in a wide pH range.
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