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- W4210434295 abstract "• Series of cation-doped Co 3 O 4 nanoarrays with same morphology are synthesized. • Experiments and DFT simulations reveal the valence regulation of Co cation. • CCO catalyst exhibits the lowest OER overpotential as lower valence state of Cu. • Controllable morphology benefits to theoretically study of the real catalysts. Bimetallic Co-based spinel oxides have been regarded as promising electrocatalysts for oxygen evolution reaction (OER), whereas, the catalytic activity still needs to be improved, and the regulation mechanism of intrinsic activity by various cations substitution remains challenges due to nanoarray morphologies difference. Herein, well-organized nanoarrays of nickel-, copper-, zinc-cobalt spinel oxides (NCO, CCO, ZCO) and pristine Co 3 O 4 with same microstructure are controllably fabricated. The time-dependent growth process of specific nanoarrays is investigated, as well as catalytic mechanism of enhanced OER activity. Cationic substitution promotes the OER activity and CCO possesses the best activity due to the highest Co valence. Theoretic simulations further validate the valence state of octahedral Co active sites increase most when doped with Cu ions, contributing to accelerated OER kinetics. Importantly, this work provides new insights to rationally design high-performance OER catalysts for matching experimental results and catalytic mechanism studies." @default.
- W4210434295 created "2022-02-08" @default.
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- W4210434295 date "2022-03-01" @default.
- W4210434295 modified "2023-09-25" @default.
- W4210434295 title "The regulation mechanism of cationic substitution in morphology-controlled oxy-spinel for oxygen evolution reaction" @default.
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- W4210434295 doi "https://doi.org/10.1016/j.jcat.2022.02.002" @default.
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