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Anodic Hydrazine Oxidation Assists Energy‐Efficient Hydrogen Evolution over a Bifunctional Cobalt Perselenide Nanosheet Electrode
Author(s) -
Zhang JunYe,
Wang Hongming,
Tian Yifan,
Yan Ya,
Xue Qi,
He Ting,
Liu Hongfang,
Wang Chundong,
Chen Yu,
Xia Bao Yu
Publication year - 2018
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201803543
Subject(s) - nanosheet , oxygen evolution , hydrazine (antidepressant) , electrolysis , bifunctional , electrolyte , anode , electrolysis of water , hydrogen production , cobalt , electrochemistry , inorganic chemistry , electrode , hydrogen , water splitting , materials science , polymer electrolyte membrane electrolysis , chemical engineering , chemistry , nanotechnology , catalysis , organic chemistry , chromatography , photocatalysis , engineering
Water 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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