Implanting HxYO2−x sites into Ru-doped graphene and oxygen vacancies for low-overpotential alkaline hydrogen evolution

Author:

Li Xiang,Deng Wei,Weng Yun,Zhang Jingjing,Mao Haifang,Lu Tiandong,Zhang Wenqian,Yang Renqiang,Jiang FeiORCID

Abstract

AbstractHighly efficient electrocatalysts for the hydrogen evolution reaction (HER) are essential for sustainable hydrogen energy. The controllable production of hydrogen energy by water decomposition depends heavily on the catalyst, and it is extremely important to seek sustainable and highly efficient water-splitting electrocatalysts for energy applications. Herein, bimetallic RuYO2x nanoparticles (Ru: 8.84 at.% and Y: 13 at.%) with high densities and low loadings were synthesized and anchored on graphene through a simple solvothermal strategy by synthesizing hydrogen yttrium ketone (HxYO2x) serving as an inserted medium. Electron microscopy demonstrated that the RuYO2x/C was composed of densely arranged particles and graphene flakes. Electrochemical results showed that the RuYO2x/C had a remarkably low overpotential of η10 = 56 mV at a current density of 10 mA cm−2 in alkaline media, a Tafel slope of 63.18 mV dec−1, and 24 h of stability. The oxygen vacancies of RuYO2x/C provided a large proton storage capacity and a strong tendency to bind hydrogen atoms. DFT calculations showed that RuYO2x/C catalysts with more Ru-O-Y bonds and VO dramatically decreased the energy barrier for breaking H-OH bonds. Moreover, the robust metal-support interactions provided optimized energies for hydrogen adsorption and desorption, which explained the high activity and favorable kinetics for RuYO2x/C catalytic hydrogen precipitation in alkaline electrolyte reactions. This work presents a hydrogen insertion method for the preparation of low-loading, high-density, high-performance and stable water decomposition catalysts for hydrogen production.

Publisher

Springer Science and Business Media LLC

Subject

Condensed Matter Physics,General Materials Science,Modeling and Simulation

Reference82 articles.

1. Xu, J. et al. Frenkel-defected monolayer MoS2 catalysts for efficient hydrogen evolution. Nat. Commun. 13, 2193 (2022).

2. Zhang, J. et al. OH spectator at IrMo intermetallic narrowing activity gap between alkaline and acidic hydrogen evolution reaction. Nat. Commun. 13, 5497 (2022).

3. Kumar, M., Meena, B., Subramanyam, P., Suryakala, D. & Subrahmanyam, C. Recent trends in photoelectrochemical water splitting: the role of cocatalysts. NPG Asia Mater. 14, 88 (2022).

4. Yu, J. et al. Sustainable oxygen evolution electrocatalysis in aqueous 1 M H2SO4 with earth abundant nanostructured Co3O4. Nat. Commun. 13, 4341 (2022).

5. Liang, Y. et al. Enhancement of electrocatalytic oxygen evolution by chiral molecular functionalization of hybrid 2D electrodes. Nat. Commun. 13, 3356 (2022).

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