Cover Picture: Hierarchical Hollow Nanoprisms Based on Ultrathin Ni‐Fe Layered Double Hydroxide Nanosheets with Enhanced Electrocatalytic Activity towards Oxygen Evolution (Angew. Chem. Int. Ed. 1/2018)

Ni-Fe layered double hydroxides (LDHs) are promising oxygen evolution reaction (OER) electrocatalysts in alkaline electrolytes. In their Communication on page 172 ff., X. W. Lou et al. report a facile self-templated strategy for the synthesis of hierarchical hollow nanoprisms composed of ultrathin Ni-Fe LDH nanosheets. These hollow prisms with large surface areas display high electrocatalytic activity towards the OER, with a low overpotential, a small Tafel slope, and remarkable stability. Ni-Fe layered double hydroxides (LDHs) are promising oxygen evolution reaction (OER) electrocatalysts in alkaline electrolytes. In their Communication on page 172 ff., X. W. Lou et al. report a facile self-templated strategy for the synthesis of hierarchical hollow nanoprisms composed of ultrathin Ni-Fe LDH nanosheets. These hollow prisms with large surface areas display high electrocatalytic activity towards the OER, with a low overpotential, a small Tafel slope, and remarkable stability. Medium-Ring Compounds Redox Flow Batteries Heterogeneous Catalysis