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- W3043289024 abstract "Despite the tremendous efforts devoted to enhancing the activity of oxygen evolution reaction (OER) catalysts, there is still a huge challenge to deeply understand the electronic structure characteristics of transition metal oxide to guide the design of more active catalysts. Herein, Fe3O4 with oxygen vacancies (Fe3O4-Vac) was synthesized via Ar ion irradiation method and its OER activity was greatly improved by properly modulating the electron density around Fe atoms. The electron density of Fe3O4-Vac around Fe atoms increased compared to that of Fe3O4 according to the characterization of synchrotron-based X-ray absorption near-edge structure (XANES), extended X-ray absorption fine structure (EXAFS) spectra, and density functional theory (DFT) calculation. Moreover, the DFT results indicate the enhancement of the desorption of HOO* groups which significantly reduced the OER reaction barrier. Fe3O4-Vac catalyst shows an overpotential of 353 mV, lower than that of FeOOH (853 mV) and Fe3O4 (415 mV) at 10 mA cm−2, and a low Tafel slope of 50 mV dec−1 in 1 M KOH, which was even better than commercial RuO2 at high potential. This modulation approach provides us with valuable insights for exploring efficient and robust water-splitting electrocatalysts." @default.
- W3043289024 created "2020-07-23" @default.
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- W3043289024 date "2020-09-13" @default.
- W3043289024 modified "2023-10-18" @default.
- W3043289024 title "Oxygen Vacancy‐induced Electron Density Tuning of Fe <sub>3</sub> O <sub>4</sub> for Enhanced Oxygen Evolution Catalysis" @default.
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- W3043289024 doi "https://doi.org/10.1002/eem2.12112" @default.
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