Inside Cover: Metallic Single-Unit-Cell Orthorhombic Cobalt Diselenide Atomic Layers: Robust Water-Electrolysis Catalysts (Angew. Chem. Int. Ed. 41/2015).

Liang, Liang; Cheng, Hao; Lei, Fengcai; Han, Jun; Gao, Shan; Wang, Chengming; Sun, Yongfu; Qamar, Shaista; Wei, Shiqiang; Xie, Yi

Single‐unit‐cell orthorhombic CoSe2 sheets are prepared by thermally exfoliating a lamellar CoSe2–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 Co2+ 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.

ANGEWANDTE Chemie (Periodical); CHEMISTRY periodicals; MAGAZINE covers

Angewandte Chemie International Edition, 2015, Vol 54, Issue 41, p11878

1433-7851

Academic Journal

10.1002/anie.201507431