Cobalt Oxide Materials for Oxygen Evolution Catalysis via Single‐Source Precursor Chemistry

摘要: The utilization of metal alkoxides as single-source precursors for (mixed-)oxide materials offers remarkable benefits, such the possibility to precisely control ratio in resulting material, highly homogeneous distribution elements film, and low temperatures required film processing. Herein we report on isolation characterization bimetallic Co-Mo alkoxide [Co3 Mo4 O10 (OCH3 )10 (dmf)4 ] (Co3 ; dmf=N,N-dimethylformamide), which was prepared by anion metathesis reaction corresponding chlorides. explored a well-defined precursor cobalt oxide catalysts oxygen evolution (OER) alkaline electrolyte MOH. demonstrated excellent activity OER, manifested onset potentials Tafel slopes superb stability under operating conditions both nearly neutral media. It observed that nature cation MOH (M+ =Li+ , Na+ K+ Cs+ ) greatly affected catalytic performance material. We propose positive effect larger cations OER could be explained higher hydration enthalpies ions enhanced mass transport within interlayer space between [CoO2 ]δ-∞ sheets situ formed binary oxides. may deduced this trend is universal extended other types oxides forming layered structures during OER.