Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 57, Issue 26, Pages 7649-7653Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201803543
Keywords
bifunctional electrocatalysts; cobalt perselenides; hydrazine oxidation; hydrogen evolution reaction
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Funding
- National 1000 Young Talents Program of China
- National Natural Science Foundation of China [51702213]
- Innovation Foundation of Shenzhen Government [JCYJ20160408173202143]
- Fundamental Research Funds for the Central University [2017KFXKJC002, GK201602002]
- Innovation Research Funds of HUST [2017KFYXJJ164]
- Analytical and Testing Center of Huazhong University of Science and Technology
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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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