分解水
电催化剂
材料科学
镍
化学工程
析氧
催化作用
金属有机骨架
过渡金属
电极
碳纤维
纳米技术
化学
电化学
复合材料
冶金
物理化学
复合数
有机化学
光催化
吸附
工程类
作者
Neng Chen,Sai Che,Hongchen Liu,Na Ta,Guohua Li,Fengjiang Chen,Guangfu Ma,Fan Yang,Yongfeng Li
出处
期刊:Catalysts
[MDPI AG]
日期:2022-10-27
卷期号:12 (11): 1319-1319
被引量:5
标识
DOI:10.3390/catal12111319
摘要
The in situ growth of metal organic framework (MOF) derivatives on the surface of nickel foam is a novel type of promising self-supporting electrode catalyst. In this paper, this work reports for the first time the strategy of in situ growth of Ni-MOF, where the metal source is purely provided by a nickel foam (NF) substrate without any external metal ions. MOF-derived Ni2P/NPC structure is achieved by the subsequent phosphidation to yield Ni2P on porous N, P-doped carbon (NPC) backbone. Such strategy provides the as-synthesized Ni2P/NPC/NF electrocatalyst an extremely low interfacial steric resistance. Moreover, a unique three-dimensional hierarchical structure is achieved in Ni2P/NPC/NF, providing massive active sites, short ion diffusion path, and high electrical conductivity. Directly applied as the electrode, Ni2P/NPC/NF demonstrates excellent electrocatalytic performance towards both the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), with low overpotentials of only 58 mV and 208 mV to drive 10 mA cm−2, respectively, in 1 M KOH. Furthermore, Ni2P/NPC/NF acting as the overall water splitting electrodes can generate a current density of 10 mA cm−2 at an ultralow cell voltage of 1.53 V. This simple strategy paves the way for the construction of self-supporting transition metal-based electrocatalysts.
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