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• W4308489783 endingPage "167787" @default.
• W4308489783 startingPage "167787" @default.
• W4308489783 abstract "Catalysts with amorphous structures have shown excellent performance in electrocatalytic water oxidation, but it remains a challenge to prepare efficient catalysts using simple methods while maintaining high yields. Herein, amorphous Fe x Co y W z oxides nanoparticles were prepared by a one-step co-precipitation method, and the Fe content was optimized to ensure efficient water oxidation. The prepared Fe 0.05 Co 0.09 W 0.61 O 0.25 had the best OER performance with a yield of 95.6% when the Co and Fe feeding ratio was 2:1. The Fe 0.05 Co 0.09 W 0.61 O 0.25 possessed an overpotential of 267 mV at 10 mA cm -2 with a small Tafel slope of 39.4 mV dec -1 . The activation energy at 1.5 V is only 49.4 kJ mol -1 , and Faraday efficiency is close to 100%. The water oxidation performance of the two-electrode test shows that the voltages at 10 mA cm -2 are only 1.50 V. In addition, it still maintained high activity after 72 h of chronoamperometry test, which exhibits excellent water oxidation performance among similar non-precious transition metal catalysts. Therefore, the present work provides a simple and easy way to prepare high-activity and high-yield transition metal amorphous electrocatalysts. The elemental synergy between Fe, Co, W, and O in amorphous Fe 0.05 Co 0.09 W 0.61 O 0.25 promotes electrocatalytic water oxidation, and the CoOOH generated during the reaction provides stability in the catalytic process. • The simple method successfully prepared high performance amorphous Fe 0.05 Co 0.09 W 0.61 O 0.25 . • Fe modulates the electronic configuration and morphology of CoWO 4 . • The optimal ratio of Fe doping into CoWO 4 is regulated. • Co acts as the main catalytic site in the OER process instead of Fe." @default.
• W4308489783 created "2022-11-12" @default.
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• W4308489783 date "2023-02-01" @default.
• W4308489783 modified "2023-10-14" @default.
• W4308489783 title "Facile synthesis of FeCoW oxides: Effects of amorphous structure, electronic configuration and catalytic sites on water oxidation" @default.
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• W4308489783 doi "https://doi.org/10.1016/j.jallcom.2022.167787" @default.
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