Journal
JOURNAL OF POWER SOURCES
Volume 520, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2021.230862
Keywords
Tungsten oxide; Nickel-incorporated; Oxygen vacancy; Electrocatalyst; Hydrogen evolution reaction
Funding
- Guangxi Natural Science Foundation [2018GXNSFAA294076, 2018GXNSFBA281089]
- Middle-aged and Young Teachers' Basic Ability Promotion Project of Guangxi [2019KY0162]
- Scientific Research Foundation of Guangxi University for Nationalities [2017KJQD003]
- Specific research project of Guangxi for research bases and talents [AD18126005]
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This study presents a concise strategy for the preparation of a low-cost and highly efficient electrocatalyst for hydrogen evolution reaction (HER). Hierarchical Ni-incorporated oxygen vacancies-rich tungsten oxides micro-flowers on 3D conductive carbon cloth support (Ni-W H2-550) were prepared and exhibited a low overpotential and robust stability in alkaline electrolyte solution, indicating their potential application in electrocatalytic water splitting for clean energy generation.
Hydrogen generated by electrocatalysis water splitting is a promising way to harvest clean energy. However, exploring the cheap and highly efficient electrocatalysts with Pt-like activity for hydrogen evolution reaction (HER) remains great challenges. Herein, we report hierarchical Ni-incorporated oxygen vacancies-rich tungsten oxides micro-flowers on 3D conductive carbon cloth support (denoted as Ni-W H2-550) as a binder-free electrode for high efficient hydrogen evolution. The binder-free 3D structure and the synergistic effect between Niincorporated and rich oxygen vacancies can regulate the electronic structure, facilitate the electron transfer, and enlarge the exposed active sites. The as-prepared Ni-W H2-550 exhibits a low overpotential of 25 mV at 10 mA cm-2 with robust stability in alkaline electrolyte solution over 20 h. This study opens up a concise strategy toward the preparation of the low-cost and highly efficient electrocatalyst for HER.
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