Abstract
The kinetics of the hydrogenation of magnesium composites with graphene-like material (GLM) on which nickel particles are deposited (Ni/GLM) and dehydrogenation of MgH2+Ni/GLM composites is studied. The mechanism of the reactions is revealed using the obtained results and the mathematical processing of curves with the Avrami–Erofeev equation. It is found that Ni/GLM considerably accelerates the hydrogenation of Mg and the decomposition of MgH2 in the composite. The hydrogen-accumulating Mg+Ni/GLM composite is shown to have cyclic stability with rapid and virtually complete reversible hydrogenation.
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ACKNOWLEDGMENTS
Our physicochemical studies of the materials were performed using the facilities at the Institute of Problems of Chemical Physics and scientific organizations of the South Africa and Norway.
Funding
M.V. Lototskyy is grateful to the Department of Science and Technology (DST, project KP6–S01/HySA) and the National Research Foundation of South Africa (NRF, grant 109092). V.A. Yartys would like to thank the Research Council of Norway (RCN; project 285146).
This work is supported by BRICS STI Framework Programme (project 064-RICS-MH). Russian co-authors are grateful to the Ministry of Science and Higher Education for the financial support (agreement no. 14.613.21.0087, unique identifier RFMEFI61318X0087).
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Tarasov, B.P., Mozhzhukhin, S.A., Arbuzov, A.A. et al. Features of the Hydrogenation of Magnesium with a Ni-Graphene Coating. Russ. J. Phys. Chem. 94, 996–1001 (2020). https://doi.org/10.1134/S0036024420050222
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DOI: https://doi.org/10.1134/S0036024420050222