过电位
异质结
材料科学
电催化剂
分解水
电化学
离解(化学)
化学工程
纳米结构
电子转移
氢
解吸
催化作用
纳米技术
化学
电极
光电子学
物理化学
吸附
工程类
有机化学
光催化
生物化学
作者
Dong Liu,Haoqiang Ai,Mingpeng Chen,Pengfei Zhou,Bowen Li,Di Liu,Xinyu Du,Kin Ho Lo,Koon‐Kwan Ng,Shuangpeng Wang,Shi Chen,Guichuan Xing,Jin‐Song Hu,Hui Pan
出处
期刊:Small
[Wiley]
日期:2021-03-18
卷期号:17 (17)
被引量:86
标识
DOI:10.1002/smll.202007557
摘要
Abstract Hydrogen evolution reaction (HER) is a key step for electrochemical energy conversion and storage. Developing well defined nanostructures as noble‐metal‐free electrocatalysts for HER is promising for the application of hydrogen technology. Herein, it is reported that 3D porous hierarchical CoNiP/Co x P multi‐phase heterostructure on Ni foam via an electrodeposition method followed by phosphorization exhibits ultra‐highly catalytic activity for HER. The optimized CoNiP/Co x P multi‐phase heterostructure achieves an excellent HER performance with an ultralow overpotential of 36 mV at 10 mA cm −2 , superior to commercial Pt/C. Importantly, the multi‐phase heterostructure shows exceptional stability as confirmed by the long‐term potential cycles (30,000 cycles) and extended electrocatalysis (up to 500 h) in alkaline solution and natural seawater. Experimental characterizations and DFT calculations demonstrate that the strong electronic interaction at the heterointerface of CoNiP/CoP is achieved via the electron transfer from CoNiP to the heterointerface, which directly promotes the dissociation of water at heterointerface and desorption of hydrogen on CoNiP. These findings may provide deep understanding on the HER mechanism of heterostructure electrocatalysts and guidance on the design of earth‐abundant, cost‐effective electrocatalysts with superior HER activity for practical applications.
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