Electrocatalysis: Topotactic Engineering of Ultrathin 2D Nonlayered Nickel Selenides for Full Water Electrolysis (Adv. Energy Mater. 14/2018)

The frontispiece image for article 1702704 by Gengfeng Zheng, and Ghim Wei Ho shows a number of nanosheets. The four in the background represent layered Ni(OH)2 nanosheests, which are composed of two layers and formed in acidic media. The two nanosheets in the foreground represent non-layered NiSe, which are converted from their layered Ni(OH)2 counterparts by a nondestructive selenization process. The non-layered NiSe nanosheets exhibit efficient water splitting capability.