Oxygen Evolution Reaction: Ni3+-Induced Formation of Active NiOOH on the Spinel Ni-Co Oxide Surface for Efficient Oxygen Evolution Reaction (Adv. Energy Mater. 10/2015).

In article number 1500091 Hao Ming Chen, Bin Liu, and co‐workers report a new hierarchical Ni‐Co oxide nanostructure composed of small secondary nanosheets grown on primary nanosheet arrays, which is synthesized to decrease the overpotential and facilitate the catalytic reaction. The Ni ions located in the tetrahedral site of the coordinated oxygen within the Ni‐Co spinel structure are the main redox site for oxygen evolution reaction, as revealed using in situ X‐ray absorption spectroscopy. [ABSTRACT FROM AUTHOR]