期刊
CATALYSIS TODAY
卷 400, 期 -, 页码 6-13出版社
ELSEVIER
DOI: 10.1016/j.cattod.2021.11.011
关键词
Cobalt foam; Hierarchical phosphide/hydroxide; Electrocatalyst; Hydrogen evolution reaction
资金
- National Natural Science Foundation of China [51872210, 52072274]
- Key Program of Natural Science Foundation of Hubei Province, China [2017CFA004]
- Special Project of Central Government for Local Science and Technology Development of Hubei Province [2019ZYYD076]
- Scientific Research Project of Education Department of Hubei Province [D20201103]
- High-Performance Computing Center of Wuhan University of Science and Technology
This study presents a hierarchical electrocatalyst of flower-like FeNiP-LDH/CF with excellent HER performance, attributed to its special structure and component advantages, as well as satisfactory porous structure and surface electronic properties.
The development of high-efficiency, stable and low-cost electrocatalysts is a matter of cardinal significance for large-scale electrolytic hydrogen production from water. In this study, we report a hierarchical electrocatalyst of flower-like FeNiP-LDH (FeNiP on layered double hydroxide) loaded on ultrahigh porosity Co foam (CF). The structure/component superiorities and hydrogen evolution reaction (HER) performance of this electrode were examined in detail. In alkaline solution, the resulting FeNiP-LDH/CF yields a current density of 10 mA/cm(2) at an overpotential of - 39 mV, which is superior than most documented transition metal phosphides electrocatalysts and even Pt catalyst (similar to -53 mV). In particular, this electrode with an undamaged microstructure can maintain its HER activity over 16 h at high current density of 500-600 mA/cm(2). Such remarkable HER performance originates from the satisfactory porous nature of Co foam as well as the special surface structure and electronic properties of phosphide/hydroxide. This work not only offers a viable modular approach for the synthesis of high-performance HER electrocatalysts, but also allows an in-depth understanding of structure-activity relationships of multistage 3D materials for energy and catalysis application.
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