Journal
CHINESE JOURNAL OF CHEMISTRY
Volume -, Issue -, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cjoc.202300441
Keywords
Energy Transfer; Seawater electrolysis; Oxygen evolution reaction; Electrodeposition method; CoO@FeSe2/CF catalyst; Nano-flower-cluster structure; Catalytic activity
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This study successfully reduced the overpotential of the oxygen evolution reaction (OER) by synthesizing nano-flower-cluster structured CoO@FeSe2/CF catalysts, improving selectivity and stability.
Seawater electrolysis holds great promise for hydrogen production in the future, while the development of anodic catalysts has been severely hampered by the side-reaction, chloride evolution reaction. In this work, nano-flower-cluster structured CoO@FeSe2/CF catalysts are synthesized via a scalable electrodeposition technique, and the performance is systematically studied. The oxygen evolution reaction (OER) overpotential of CoO@FeSe2/CF is 267 mV at 100 mAcm(-2), which is significantly lower than that of the IrO2 catalyst (435 mV). Additionally, the catalyst shows high selectivity for OER (97.9%) and almost no loss of activity after a durability test for 1100 h. The impressive performance is attributed to the dense rod-like structure with abundant active centers after electrochemical activation and the in-situ generated CoOOH and FeOOH that improve the catalytic activity of the catalyst. The synergistic effect induced by the non-uniform structure endows the catalyst with excellent stability.
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