Cobalt-Boron Catalyst for NaBH4 Hydrolysis: The State of the Active Component Forming from Cobalt Chloride in a Reaction Medium | Sciact - CRIS-система Института катализа

Cobalt-Boron Catalyst for NaBH4 Hydrolysis: The State of the Active Component Forming from Cobalt Chloride in a Reaction Medium Научная публикация

Журнал

Molecular Catalysis
ISSN: 2468-8231

Вых. Данные

Год: 2017, Том: 441, Страницы: 100-108 Страниц : 9 DOI: 10.1016/j.mcat.2017.08.008

Ключевые слова

Cobalt catalyst, Hydrolysis, Reduction, Sodium borohydride, Solution

Авторы

Netskina O.V. ¹ , Kochubey D.I. ¹ , Prosvirin I.P. ¹ , Malykhin S.E. ¹ , Komova O.V. ¹ , Kanazhevskiy V.V. ¹ , Chukalkin Y.G. ² , Bobrovskii V.I. ² , Kellerman D.G. ³ , Ishchenko A.V. ¹ , Simagina V.I. ¹

Организации

1	Boreskov Institute of Catalysis SB RAS, Pr. Akademika Lavrentieva 5, Novosibirsk, 630090, Russia
2	M.N. Mikheev Institute of Metal Physics UrB RAS, S. Kovalevskoy Str. 18, Ekaterinburg, 620990, Russia
3	Institute of Solid State Chemistry UrB RAS, Pervomaiskaya Street 91, Ekaterinburg, 620219, Russia

Информация о финансировании (1)

Российский научный фонд

14-22-01045

The structure of a cobalt-boron catalyst obtained by reduction of cobalt chloride in an aqueous solution of sodium borohydride at ambient temperature has been investigated by TEM HR, XPS, EXAFS and X-ray diffraction method. It was found that nanoparticles of the forming catalyst consisted of a core and a shell. The oxygen-containing compounds (cobalt hydroxide and cobalt borates) mainly reside in the shell. In spite of the amorphous state of the catalyst the EXAFS and X-ray diffraction analysis indicated the presence of ferromagnetic clusters with the shortest CoCo distance of about 2.5 Å and coordination number of 2.7 which are regularly distributed within the core with average separations of 5.8 Å. The presence in the catalyst of the CoB bonds, a short CoCo distance and the absence of long CoCo distances (4.3 and 4.8 Å) as well as the presence of boron bound to hydrogen allows suggestion to be made that stabilization of the cobalt tetramers occurs due to the presence of a boron-hydrogen structure formed by BH4− ions upon the reduction of cobalt chloride. To substantiate the above model of the active phase of the cobalt-boron catalyst the DFT method with a PBE functional in the plane-wave basis has been employed which showed that the ferromagnetic tetramers may exist within a boron-hydrogen matrix isolated from the surrounding medium by an oxygen-containing shell.

Netskina O.V. , Kochubey D.I. , Prosvirin I.P. , Malykhin S.E. , Komova O.V. , Kanazhevskiy V.V. , Chukalkin Y.G. , Bobrovskii V.I. , Kellerman D.G. , Ishchenko A.V. , Simagina V.I.
Cobalt-Boron Catalyst for NaBH4 Hydrolysis: The State of the Active Component Forming from Cobalt Chloride in a Reaction Medium
Molecular Catalysis. 2017. V.441. P.100-108. DOI: 10.1016/j.mcat.2017.08.008 WOS Scopus РИНЦ CAPlusCA OpenAlex

Поступила в редакцию:	13 мар. 2017 г.
Принята к публикации:	8 авг. 2017 г.
Опубликована online:	18 авг. 2017 г.
Опубликована в печати:	1 нояб. 2017 г.

Web of science:	WOS:000412961000010
Scopus:	2-s2.0-85029665499
РИНЦ:	31056365
Chemical Abstracts:	2018:85681
Chemical Abstracts (print):	169:128384
OpenAlex:	W2748419046

БД	Цитирований
Web of science	40
Scopus	42
РИНЦ	41
OpenAlex	43