Boosting hydrogen evolution reaction activity of Ru anchored binary oxyhydroxide by F-doping in alkaline seawater

被引:16
|
作者
Zhu, Jiawei [1 ]
Chi, Jingqi [1 ]
Wang, Xuanyi [1 ,2 ]
Cui, Tong [1 ,2 ]
Guo, Lili [1 ,2 ]
Dong, Bin [4 ]
Liu, Xiaobin [1 ,3 ]
Wang, Lei [1 ,2 ,3 ]
机构
[1] Qingdao Univ Sci & Technol, Coll Chem Engn, Key Lab Ecochem Engn, Minist Educ,Int Sci & Technol Cooperat Base Ecoche, Qingdao 266042, Peoples R China
[2] Qingdao Univ Sci & Technol, Coll Chem & Mol Engn, Qingdao 266042, Peoples R China
[3] Qingdao Univ Sci & Technol, Coll Environm & Safety Engn, Qingdao 266042, Peoples R China
[4] China Univ Petr East China, Coll Chem & Chem Engn, State Key Lab Heavy Oil Proc, Qingdao 266580, Peoples R China
基金
中国国家自然科学基金;
关键词
F doping; Hydrogen spillover; Work function; Seawater splitting; Large current density;
D O I
10.1016/j.nanoen.2023.109249
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Seawater electrolysis still faces harsh challenges especially at elevated current densities, which has to be ensured by highly-efficient and stable electrocatalyst. Recently, strategy involving hydrogen spillover between metal clusters and carriers has emerged as a means to enhance the hydrogen evolution reaction (HER) efficiency. In this study, we present a heterogeneous Ru/F-FeCoOOH catalyst to dissect the mechanism of hydrogen spillover between these two constituents. The DFT calculations and in-situ Raman analysis confirm the spillover of hydrogen species (H*) from Ru to F-FeCoOOH carrier. Furthermore, the introduction of F-doping narrows the work function disparity between the Ru metal and the F-FeCoOOH carrier, fostering a milieu that curtails interface H* capture and augments the potential for interface hydrogen spillover. Moreover, in-situ electrochemical impedance spectroscopy (EIS) and kinetic isotope effects (KIEs) corroborate that Ru/F-FeCoOOH exhibits extensive H* adsorption coverage and hydrogen transfer influences reaction rates. Leveraging the hydrogen spillover mechanism, the resultant Ru/F-FeCoOOH heterogeneous catalyst manifests a low overpotential of 260 mV at 2 A cm-2 and with long-term stability at least for 400 h in alkaline seawater.
引用
收藏
页数:10
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