文献类型：期刊文献

英文题名：Synergistic effect of dual active sites over Ru/a-MoC for accelerating alkaline hydrogen evolution reaction

作者：Fan, Xueliang[1];Liu, Cong[2];Wu, Minying[1];Gao, Boxu[1];Zheng, Luyao[1];Zhang, Yahong[1];Zhang, Hongbin[3];Gao, Qingsheng[4];Cao, Xiaoming[2];Tang, Yi[1]

机构：[1]Fudan Univ, Collaborat Innovat Ctr Chem Energy Mat, Dept Chem, Shanghai Key Lab Mol Catalysis & Innovat Mat,Lab A, Shanghai 200433, Peoples R China;[2]East China Univ Sci & Technol, Res Inst Ind Catalysis, Ctr Computat Chem, Sch Chem & Mol Engn,Key Lab Adv Mat, Shanghai 200237, Peoples R China;[3]Fudan Univ, Fudan Univ Lib, Inst Preservat Chinese Ancient Books, Shanghai 200433, Peoples R China;[4]Jinan Univ, Coll Chem & Mat Sci, Guangdong Prov Key Lab Funct Supramol Coordinat Ma, Guangzhou 510632, Peoples R China

年份：2022

卷号：318

外文期刊名：APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000862842200005)】；

基金：This work was supported by National Natural Science Foundation of China (22088101) and the National Key R & D Program of China (2018YFA0209402) . Prof. X. M. Cao thanks the support from National Natural Science Foundation of China (Nos. 22022302, 92045303) . Prof. H. B. Zhang thanks the support from National Natural Science Founda- tion of China (22175040) . Prof. Q. S. Gao also thanks the support from National Natural Science Foundation of China (22175077) and Inno- vation Team Project in Guangdong Colleges and Universities (2021KCXTD009) . The authors would like to thank Shiyanjia Lab ( www.shiyanjia.com ) for the ICP and XAS characterization.

语种：英文

外文关键词：Hydrogen evolution reaction; a-MoC; Ruthenium (Ru); Synergistic effect; Dual active sites

摘要：Developing alkaline hydrogen evolution reaction catalysts with ultra-low overpotential remains a significant challenge. In this paper, a three-dimensional porous Ru/alpha-MoC has been developed, which features the dual active sites of alpha-MoC and Ru. The coexistence of ultrafine Ru nanoparticles and Ru single atoms in Ru/alpha-MoC system is demonstrated by multiple structural characterizations. The fabricated Ru/alpha-MoC exhibits excellent alkaline HER activity with a low overpotential 25 mV at 10 mA cm-2, outperforming commercial 20% Pt/C (45 mV), and robust electrocatalytic stability at an industrial-scale current density of 400 mA cm-2. Particularly, the turnover frequency value reaches 39.2 s-1 at the overpotential of 100 mV. Experiments and theory investigations demonstrate the electron redistribution at the interface of alpha-MoC and Ru. The synergistic effect of dual active sites enables the easy cleavage of H-OH bond and the optimal H adsorption energy simultaneously. This work opens up a feasible way to rationally design high-efficient electrocatalysts with dual active sites for typical multistep reactions.