Oxygen Evolution Reaction: Boosting Oxygen Evolution Reaction by Creating Both Metal Ion and Lattice‐Oxygen Active Sites in a Complex Oxide (Adv. Mater. 1/2020)

In article number 1905025, Wei Zhou, Zongping Shao, and co-workers report a new complex oxide with unique hexagonal structure consisting of one honeycomb-like network, Ba4Sr4(Co0.8Fe0.2)4O15 (hex-BSCF), demonstrating ultrahigh oxygen evolution reaction activity because both the tetrahedral Co ions and the octahedral oxygen ions on the surface are active, as confirmed by combined X-ray absorption spectroscopy analysis and theoretical calculations. This work opens up a new avenue to the development of advanced electrocatalysts via unique structural design with multiple active sites.