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The Key Role of Oxide Phases Covering Dispersed Metals in Their Catalytic Activity and Stability in Hydrolysis of Boron-Containing Hydrides Full article

Journal International Journal of Hydrogen Energy
ISSN: 0360-3199 , E-ISSN: 1879-3487
Output data Year: 2025, Number: 111, Pages: 361-370 Pages count : 10 DOI: 10.1016/j.ijhydene.2025.02.319
Tags Cobalt; Cobalt-copper alloy; Oxidation; Sodium borohydride; Ammonia borane; Ethylenediamine bisborane; Hydrolysis
Authors Komova Oksana V. 1 , Ozerova Anna M. 1 , Rudneva Yuliya V. 2 , Simagina Valentina I. 1 , Lipatnikova Inna L. 1 , Rogov Vladimir A. 1,3 , Prosvirin Igor P. 1 , Netskina Olga V. 1
Affiliations
1 Federal research center Boreskov Institute of Catalysis SB RAS, Lavrentiev Ave. 5, 630090, Novosibirsk, Russia
2 Nikolaev Institute of Inorganic Chemistry SB RAS, Lavrentiev Ave. 3, 630090, Novosibirsk, Russia
3 Department of Natural Sciences, Novosibirsk State University, Pirogova Str. 2, 630090, Novosibirsk, Russia

Funding (2)

1 The Ministry of Education and Science of the Russian Federation FWUZ-2021-0002 (121031700315-2)
2 Ministry of Science and Higher Education of the Russian Federation FWUR-2024-0034

Abstract: Samples of dispersed metallic Co and Co0.9Cu0.1 alloy were prepared through the reductive thermolysis of metal precursors. This study represents the first comparative analysis of the catalytic activity and stability of the metals and oxidized metal samples in the hydrolysis of three boron-containing hydrides: NaBH4, NH3BH3, and (CH2NH2BH3)2. It was shown that the oxygen-containing layer on the metal is directly involved in the catalytic process, and additional oxidation of the metals enhances the catalytic activity and prolongs the stability during repeated reaction cycles. The results obtained and literature analysis allow us to suggest that the reducibility of cobalt oxide phases and their amount in the catalyst play a crucial role. Only oxides with high reducibility may act as catalysts in the hydrolysis of boranes (NH3BH3, (CH2NH2BH3)2). The easier the oxide is reduced, the higher the concentration of active CoxB centers is formed under the action of the reaction medium, and the higher the initial rate of hydrogen generation will be observed. On the other hand, a deficit of oxide phase during the longer stability tests may restrict the generation of fresh CoxB and complicate the water activation process considered in literature as a rate-determining step.
Cite: Komova O.V. , Ozerova A.M. , Rudneva Y.V. , Simagina V.I. , Lipatnikova I.L. , Rogov V.A. , Prosvirin I.P. , Netskina O.V.
The Key Role of Oxide Phases Covering Dispersed Metals in Their Catalytic Activity and Stability in Hydrolysis of Boron-Containing Hydrides
International Journal of Hydrogen Energy. 2025. N111. P.361-370. DOI: 10.1016/j.ijhydene.2025.02.319 Scopus AN OpenAlex
Dates:
Submitted: Oct 22, 2024
Accepted: Feb 19, 2025
Published online: Feb 26, 2025
Published print: Mar 1, 2025
Identifiers:
Scopus: 2-s2.0-85218413432
Chemical Abstracts: 2025:487284
OpenAlex: W4407963280
Citing: Пока нет цитирований
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