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Published on: December 6, 2021
Hexamethylenetetramine induced multidimensional defects in Co2P nanosheets for efficient alkaline hydrogen evolution
Tingjuan Wang1, Chao Wang1, Yaoyao Ni1
1College of Chemistry and Materials Science, The Key Laboratory of Electrochemical Clean Energy of Anhui Higher Education Institutes, Anhui Provincial Engineering Laboratory for New-Energy Vehicle Battery Energy-Storage Materials, Anhui Normal University, Wuhu, 241002, China. bygeng@mail.ahnu.edu.cn.
We engineered cobalt phosphide (Co2P) nanosheets with multi-dimensional defects using hexamethylenetetramine. This strategy enhances hydrogen evolution reaction (HER) catalysis, showing excellent activity and stability.
Area of Science:
- Materials Science
- Catalysis
- Electrochemistry
Background:
- Crystal engineering is crucial for optimizing transition-metal phosphide catalysts.
- Defects like grain boundaries, N doping, and P vacancies can significantly influence catalytic performance.
Purpose of the Study:
- To develop a novel strategy for introducing multi-dimensional defects into Co2P nanosheets.
- To investigate the impact of these defects on the hydrogen evolution reaction (HER) catalytic activity and stability.
Main Methods:
- Utilized hexamethylenetetramine to induce multi-dimensional defects in Co2P nanosheets.
- Characterized the defect structures, including grain boundaries, N doping, and P vacancies.
- Evaluated the HER catalytic performance using electrochemical measurements.
Main Results:
- The engineered Co2P nanosheets exhibited synergistic effects from multi-dimensional defects.
- Achieved excellent HER catalytic performance with an overpotential of 159 mV at 100 mA cm-2.
- Demonstrated high stability over 36 hours at 10 mA cm-2 in 1 M KOH.
Conclusions:
- The multi-dimensional defects strategy effectively enhances the catalytic activity and stability of Co2P nanosheets for HER.
- Co2P nanosheets with engineered defects show promise as efficient electrocatalysts for hydrogen production.
