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Inside Cover: Metallic Single‐Unit‐Cell Orthorhombic Cobalt Diselenide Atomic Layers: Robust Water‐Electrolysis Catalysts (Angew. Chem. Int. Ed. 41/2015)
Author(s) -
Liang Liang,
Cheng Hao,
Lei Fengcai,
Han Jun,
Gao Shan,
Wang Chengming,
Sun Yongfu,
Qamar Shaista,
Wei Shiqiang,
Xie Yi
Publication year - 2015
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201507431
Subject(s) - tafel equation , orthorhombic crystal system , cobalt , materials science , metal , cover (algebra) , catalysis , lamellar structure , crystallography , chemistry , nanotechnology , electrochemistry , electrode , metallurgy , crystal structure , organic chemistry , mechanical engineering , engineering
Single‐unit‐cell orthorhombic CoSe 2 sheets are prepared by thermally exfoliating a lamellar CoSe 2 –DETA hybrid. As shown by Y. Sun, S. Wei, Y. Xie et al. in their Communication on page 12004 ff., the single‐unit‐cell thickness means that 66.7 % of the Co 2+ ions are exposed on the surface and are low coordinate (coordination numbers of 1.3 and 2.6), leading to a lower Tafel slope (64 mV dec −1 ) and a higher turnover frequency (745 h −1 ) in water splitting.
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