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Open AccessArticle

Nanostructured Nickel Nitride with Reduced Graphene Oxide Composite Bifunctional Electrocatalysts for an Efficient Water-Urea Splitting

1
Department of Chemistry, College of Science, North University of China, Taiyuan 030051, China
2
State Key Laboratory Base of Eco-Chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science & Technology, Qingdao 266042, China
3
Wuhan Hudiandian Technology Co., Ltd., Wuhan 430000, China
*
Authors to whom correspondence should be addressed.
Nanomaterials 2019, 9(11), 1583; https://doi.org/10.3390/nano9111583 (registering DOI)
Received: 25 October 2019 / Revised: 5 November 2019 / Accepted: 6 November 2019 / Published: 8 November 2019
A three-dimensional nickel nitride with reduced graphene oxide composite on nickel foam (s-X, where s represents Ni3N/[email protected] and the annealing temperature X can be 320, 350, or 380) electrode has been fabricated through a facile method. We demonstrate that s-350 has excellent urea oxidation reaction (UOR) activity, with a demanded potential of 1.342 V to reach 10 mA/cm2 and bears high hydrogen evolution reaction (HER) activity. It provides a low overpotential of 124 mV at 10 mA/cm2, which enables the successful construction of its two-electrode alkaline electrolyzer (s-350||s-350) for water–urea splitting. It merely requires a voltage of 1.518 V to obtain 100 mA/cm2 and is 0.145 V lower than that of pure water splitting. This noble metal-free bifunctional electrode is regarded as an inexpensive and effective water–urea electrolysis assisted hydrogen production technology, which is commercially viable. View Full-Text
Keywords: bifunctional; Ni foam; electrocatalysis; hydrogen evolution reaction; urea oxidation reaction bifunctional; Ni foam; electrocatalysis; hydrogen evolution reaction; urea oxidation reaction
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MDPI and ACS Style

Wang, F.; Zhao, D.; Zhang, L.; Fan, L.; Zhang, X.; Hu, S. Nanostructured Nickel Nitride with Reduced Graphene Oxide Composite Bifunctional Electrocatalysts for an Efficient Water-Urea Splitting. Nanomaterials 2019, 9, 1583.

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