Journal
MATERIALS RESEARCH LETTERS
Volume 10, Issue 11, Pages 744-753Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/21663831.2022.2095235
Keywords
Bifunctional catalyst; hydrogen evolution reaction; oxygen evolution reaction; metal sulfide; CoNi-LDH nanosheet
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Funding
- National Key Research and Development Program of China [2021YFB4000405]
- National Nature Science Foundation of China [22122113]
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In this study, a novel hollow Co3S4/CuS@CoNi-LDH nanocomposite was designed and applied in electrochemical water splitting. The results demonstrate that this nanocomposite exhibits efficient oxygen evolution reaction and hydrogen evolution reaction. Furthermore, the water splitting device assembled with the nanocomposite as both anode and cathode requires low potential for achieving high efficiency overall water splitting.
Electrochemical water splitting is one of the most efficient strategies to generate clean energy H-2. Herein, a novel hollow Co3S4/CuS@CoNi-LDH nanocomposite was designed. This hollow Co3S4/CuS@CoNi-LDH achieved OER overpotential of 220 mV, HER overpotential of 136 mV, respectively, at the current density of 10 mA cm(-2). Notably, the hollow Co3S4/CuS@CoNi-LDH serving as both anode and cathode is assembled into a two-electrode water splitting device, and the potential of no more than 1.74 V is required to achieve the overall water splitting efficiency of 10 mA cm(-2). This work provides a promising bifunctional catalyst for overall electrochemical water splitting.
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