Abstract
In an attempt to explore high efficient and low cost electrocatalyst in H2 evolution reaction (HER), Mo2C nanoparticles with the size about 8 to 10 nm are loaded on N, P co-doped mesoporous carbon matrix successfully with Na2MoO4 and carbonated beverage as precursors. The obtained electrocatalyst, Mo2C@NPC, possesses small dimension with the size about 200 to 300 nm. Mo2C@NPC exhibits very excellent HER activity. It exhibits excellent electrocatalytic performance in basic condition, with overpotential 60 mV and Tafel slope 63 mV dec−1 to get 10 mA cm−2 current density for H2 evolution reaction (HER). To realize overall H2O splitting, Co was doped into Mo2C@NPC and a new electrocatalyst, named as Co/Mo2C@NPC was obtained. Co/Mo2C@NPC shows outstanding oxygen evolution reaction (OER) performance. Under same condition, to get current with density of 10 mA cm−2, Co/Mo2C@NPC merely need 360 mV. The electrocatalyst also possesses excellent durability, after 1000 cycles as well as 10 h long-term HER and OER tests, the current keeps stable. To achieve overall H2O splitting, an electrolyzer is constructed with Mo2C@NPC and Co/Mo2C@NPC as cathode and anode. To get a current with density 10 mA cm−2, it only needs a voltage of 1.60 V. We expect Mo2C@NPC and Co/Mo2C@NPC electrocatalyst can act as a new material for overall H2O splitting.
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This work was supported by National Natural Science Foundation (21303010) and Fundamental Research Funds for the Central University (N170504025).
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An, K., Cui, X., Xu, X. et al. Mo based electrocatalyst with N, P co-doped mesoporous carbon as matrix for overall water splitting H2 production. J Porous Mater 26, 1035–1042 (2019). https://doi.org/10.1007/s10934-018-0703-3
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DOI: https://doi.org/10.1007/s10934-018-0703-3