期刊
CHEMELECTROCHEM
卷 6, 期 7, 页码 2100-2106出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/celc.201900259
关键词
electrocatalysts; high current density; hydrogen evolution reaction; nickel nanocrystals; pH-neutral solution
资金
- National Natural Science Foundation of China [21722406, 21778052]
- Anhui Provincial Natural Science Foundation [1908085J19]
- Chinese Academy of Science (CAS) [2016-171]
- TWAS [2016-171]
Earth-abundant elements based efficient and stable electrocatalyst for hydrogen generation from pH-neutral aqueous solutions is highly desired, but still a momentous task. Herein, we report a nickel nanocrystal assembled nanoparticles (Ni-SP) synthesis through a simple solution phase ultrasonic-assisted chemical reduction method. The addition of tungsten (W) metal as a non-3d high valency element and non-metals (B and P) as low valency element could modulate the hydrogen adsorption energy for efficient catalysis of the hydrogen evolution reaction (HER). For HER in pH-neutral buffer solution, the Ni-SP needs 38 and 214 mV overpotential to drive 10 and 100 mA cm(-2) current densities, respectively. Moreover, the catalytic activity of Ni-SP remains unaffected after 10 h of hydrogen production at 100 mA cm(-2) current density, presenting superior stability and activity as compared to Pt/C.
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