期刊
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
卷 895, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2021.115514
关键词
Electrocatalysis; Metal-organic frameworks; Hydrogen evolution reaction; Co-MOF; CoP heterostructures; 2D nanosheet arrays
资金
- National Natural Science Foundation of China [21573063]
- Hunan Provincial Natural Science Fund for Excellent Young Scholars [2020JJ3002]
- Hunan Provincial Key Laboratory of Advanced Materials for New Energy Storage and Conversion [2018TP1037_201902]
- Hunan University Training Program for Excellent Young Scholars and Shenzhen Science and Technology Innovation Committee [JCYJ20170306141630229]
This study proposed a facile method to fabricate a self-supported electrode with excellent hydrogen evolution reaction (HER) activities. The optimized 2D CoP/Co-MOF exhibits outstanding HER performance over a wide pH range, with fast charge-transfer rate and abundant exposed active sites. This work provides an effective strategy to design pH-universal HER activity of MOF-based electrocatalysts.
Hydrogen has been regarded as one of promising renewable alternatives to traditional fossil fuels. It remains a big challenge to explore highly efficient catalysts with low cost for hydrogen evolution reaction (HER) in energy storage and conversion. Herein, we proposed a facile method to fabricate a self-supported electrode with two-dimensional (2D) CoP/Co-MOF heterostructure nanosheets via a partially controlled phosphorization method. The optimal 2D CoP/Co-MOF exhibits excellent HER activities over a wide pH range, which only requires 52, 106, and 26 mV overpotentials at -10 mA cm-2 in acidic (0.5 M H2SO4), neutral (1.0 M PBS) and alkaline (1.0 M KOH) solution, respectively. Additionally, CoP/Co-MOF also presents desirable durability under different pH media. The excellent HER performance can be attributed to the fast charge-transfer rate and abundant exposed active sites because of the modified electronic structure and increased specific surface area. This work provides an effective strategy to design the pH-universal HER activity of MOF-based electrocatalysts.
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