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• W3204161970 endingPage "132697" @default.
• W3204161970 startingPage "132697" @default.
• W3204161970 abstract "• The Co and Mo 2 C heterostructure supported on carbon (Co/Mo 2 C@C) is synthesized via a simple phase segregation method. • DFT calculations indicate that Co can improve the HER activity of Mo 2 C by electronic synergistic effect. • Post OER test indicate that Co can significantly improve the OER stability of Mo 2 C through a “self-sacrifice” effect. • Designed Co/Mo 2 C@C exhibits excellent overall water splitting performance in alkaline. Molybdenum carbide (Mo 2 C) has emerged as a promising electrocatalyst for water splitting because of its Pt-like electronic structure. However, unsatisfactory Hydrogen evolution reaction (HER) activity and poor Oxygen evolution reaction (OER) stability are obstacles to its practical application. Herein, we designed a strategy to improve the electrocatalytic performance of Mo 2 C by constructing a Co and Mo 2 C heterostructure supported on carbon (Co/Mo 2 C@C). Experimental and theoretical calculations showed the significant improvements caused by the synergistic effects between Co and Mo 2 C. Electrons from Co could transfer to Mo 2 C and accumulate on Mo. This promoted the adsorption of H 2 O and desorption of H, which improved the HER. In contrast, the Co could inhibit the oxidation and dissolution of Mo 2 C through a “self-sacrifice” effect, which significantly improved the OER stability of Mo 2 C. Owing to the synergetic effects between Co and Mo 2 C, the as-synthesized catalyst exhibited superior electrocatalytic performances in an alkaline electrolyte, and afforded low overpotentials of 98 and 254 mV at 10 mA cm −2 for catalyzing the HER and OER, respectively. Moreover, Co/Mo 2 C@C enabled overall water splitting at a cell voltage of 1.59 V, to achieve a current density of 10 mA cm −2 with an exceptional electrochemical stability that outperformed noble-metal catalysts." @default.
• W3204161970 created "2021-10-11" @default.
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• W3204161970 date "2022-02-01" @default.
• W3204161970 modified "2023-10-12" @default.
• W3204161970 title "Dual synergistic effects between Co and Mo2C in Co/Mo2C heterostructure for electrocatalytic overall water splitting" @default.
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• W3204161970 doi "https://doi.org/10.1016/j.cej.2021.132697" @default.
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