The Key Role of Oxide Phases Covering Dispersed Metals in Their Catalytic Activity and Stability in Hydrolysis of Boron-Containing Hydrides | Sciact - CRIS-система Института катализа

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

Журнал

International Journal of Hydrogen Energy
ISSN: 0360-3199 , E-ISSN: 1879-3487

Вых. Данные

Год: 2025, Номер: 111, Страницы: 361-370 Страниц : 10 DOI: 10.1016/j.ijhydene.2025.02.319

Ключевые слова

Cobalt; Cobalt-copper alloy; Oxidation; Sodium borohydride; Ammonia borane; Ethylenediamine bisborane; Hydrolysis

Авторы

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

Организации

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

Информация о финансировании (2)

1	Министерство образования и науки Российской Федерации	FWUZ-2021-0002 (121031700315-2)
2	Министерство науки и высшего образования Российской Федерации (с 15 мая 2018)	FWUR-2024-0034

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.

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 WOS Scopus CAPlus OpenAlex

Поступила в редакцию:	22 окт. 2024 г.
Принята к публикации:	19 февр. 2025 г.
Опубликована online:	26 февр. 2025 г.
Опубликована в печати:	1 мар. 2025 г.

Web of science:	WOS:001439490700001
Scopus:	2-s2.0-85218413432
Chemical Abstracts:	2025:487284
OpenAlex:	W4407963280

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