期刊
MATERIALS LETTERS
卷 319, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.matlet.2022.132302
关键词
Co9S8 nanoarrays; NiFe-layered double-hydroxide; Oxygen evolution reaction; Hydrogen evolution reaction; Water-splitting
资金
- Chinese Postdoctoral Science Founda-tion [2020TQ0354]
- Guiding Plan Project of Liaoning Province Depart-ment of Science and Technology [2019-ZD-0477]
- Scientific Research Funding Project of Liaoning Province [LQN201912]
This study presents a novel electrocatalyst Co9S8@NiFe-LDH/NF for water-splitting, which achieves excellent catalytic activity for both oxygen evolution reaction and hydrogen evolution reaction by enhancing active sites, charge transfer capability, and durability through structural design.
Rational design of efficient, low-cost, and durable electrocatalyst for water-splitting is of great importance in the utilization of renewable energy. In this work, we report a facile heterostructure of nickel foam supporting hollow Co9S8 nanoarrays wrapped by NiFe-layered double-hydroxide (Co9S8@NiFe-LDH/NF) as the electrocatalyst for both oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) to improve the water-splitting efficiency. By the structural design, the strong electronic interaction among each component could offer more actives sites, higher charge transfer capability and better durability. As a result, excellent electrocatalytic activity for HER and OER are obtained. In 1 M KOH solution, the Co9S8@NiFe-LDH/NF exhibits low overpotentials of 287 mV for OER and 280 mV for HER to achieve catalytic current density of 50 mA cm(-2). This work offers a new avenue to construct efficient and low-cost electrocatalyst for water-splitting.
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