Anodic Hydrazine Oxidation Assists Energy‐Efficient Hydrogen Evolution over a Bifunctional Cobalt Perselenide Nanosheet Electrode

Angewandte Chemie - International Edition - Tập 57 Số 26 - Trang 7649-7653 - 2018
Junye Zhang1, Hongming Wang2, Yufei Tian3, Ya Yan4, Qi Xue5, Ting He1, Hongfang Liu1, Chundong Wang3, Yu Chen5, Bao Yu Xia1,6
1Key Laboratory of Material Chemistry for Energy Conversion and Storage (Ministry of Education), Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology (HUST), 1037 Luoyu Road, Wuhan 430074, P. R. China
2Institute for Advanced Study, Nanchang University, 999 Xuefu Road, Nanchang, P. R. China
3School of Optical and Electronic Information, Huazhong University of Science and Technology (HUST), 1037 Luoyu Road, Wuhan, 430074 P. R. China
4School of Materials Science & Engineering, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai, 200093 P. R. China
5Key Laboratory of Macromolecular Science of Shaanxi Province, Key Laboratory of Applied Surface and Colloid Chemistry (MOE), Shaanxi Key Laboratory for Advanced Energy Devices, School of Materials Science and Engineering, Shaanxi Normal University, 199 Chang'an Rd, Xi'an, 710062 P. R. China
6Shenzhen Institute of Huazhong University of Science and Technology, 9 Yuexing Road, Shenzhen, 518000 P. R. China

Tóm tắt

AbstractWater electrolysis is a promising source of hydrogen; however, technological challenges remain. Intensive efforts have focused on developing highly efficient and earth‐abundant electrocatalysts for water splitting. An effective strategy is proposed, using a bifunctional tubular cobalt perselenide nanosheet electrode, in which the sluggish oxygen evolution reaction is substituted with anodic hydrazine oxidation so as to assist energy‐efficient hydrogen production. Specifically, this electrode produces a current density of 10 mA cm−2 at −84 mV for hydrogen evolution and −17 mV for hydrazine oxidation in 1.0 m KOH and 0.5 m hydrazine electrolyte. An ultralow cell voltage of only 164 mV is required to generate a current density of 10 mA cm−2 for 14 hours of stable water electrolysis.

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