首页|TiN ceramic membrane supported nitrogen-incorporating NiCo2 nanowires as bifunctional electrode for overall water splitting in alkaline solution
TiN ceramic membrane supported nitrogen-incorporating NiCo2 nanowires as bifunctional electrode for overall water splitting in alkaline solution
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Developing a highly efficient, cost-effective, and stable bifunctional electrode for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is still a major challenge. This work reports on a novel method for fabricating TiN ceramic membrane supported nitrogen-incorporating NiCo2 nanowires (NiCo2-N/TiN) as a bifunctional electrode. Owing to its unique structure, the ample reaction sites available, and the enhanced mass/charge transport ability, the NiCo2-N/TiN electrode exhibits efficient catalytic performance both in HER and OER, with overpotentials of 131 mV at 20 mA· cm~(-2) for HER and 330 mV at 20 mA·cm~(-2) for OER, together with excellent stability in alkaline solution. The NiCo2-N/TiN electrode only requires a cell voltage of 1.71 V to drive the current density of 20 mA · cm~(-2) for overall water splitting, which exhibits excellent stability for more than 100000 s. Accordingly, the produced ceramic membrane electrode has a great potential for application in industrial hydrogen production.
Overall water splittingBifunctional electrocatalystNiCo2 alloy nanowiresTitanium nitrideMembrane electrode
Chuntian Tan、Feihong Wang、Kai Lv
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CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, PR China
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