Formation of Catalytically Active Nanoparticles under Thermolysis of Silver Chloroplatinate(II) and Chloroplatinate(IV) | Sciact - CRIS-система Института катализа

Formation of Catalytically Active Nanoparticles under Thermolysis of Silver Chloroplatinate(II) and Chloroplatinate(IV) Научная публикация

Журнал

Molecules
ISSN: 1420-3049

Вых. Данные

Год: 2022, Том: 27, Номер: 4, Номер статьи : 1173, Страниц : 15 DOI: 10.3390/molecules27041173

Ключевые слова

thermolysis; silver; platinum; solid solution of metals; CO PROX

Авторы

Filatov Evgeny ¹ , Smirnov Pavel ^1,2 , Potemkin Dmitry ^2,3 , Pishchur Denis ¹ , Kryuchkova Natalya ¹ , Plyusnin Pavel ¹ , Korenev Sergey ¹

Организации

1	Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, 630090 Novosibirsk, Russia
2	Department of Natural Sciences, Novosibirsk State University, 630090 Novosibirsk, Russia
3	Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, 630090 Novosibirsk, Russia

Информация о финансировании (2)

1	Министерство образования и науки Российской Федерации	FWUZ-2021-0002 (121031700315-2)
2	Российский научный фонд	21-73-20203 (121042600285-5)

The thermal behaviour of Ag2[PtCl4] and Ag2[PtCl6] complex salts in inert and reducing atmospheres has been studied. The thermolysis of compounds in a helium atmosphere is shown to occur in two stages. At the first stage, the complexes decompose in the temperature range of 350–500 °C with the formation of platinum and silver chloride and the release of chlorine gas. At the second stage, silver chloride is sublimated in the temperature range of 700–900 °C, while metallic platinum remains in the solid phase. In contrast to the thermolysis of Ag2[PtCl6], the thermal decomposition of Ag2[PtCl4] at 350 °C is accompanied by significant heat release, which is associated with disproportionation of the initial salt to Ag2[PtCl6], silver chloride, and platinum metal. It is confirmed by DSC measurements, DFT calculations of a suggested reaction, and XRD. The thermolysis of Ag2[PtCl4] and Ag2[PtCl6] compounds is shown to occur in a hydrogen atmosphere in two poorly separable steps. The compounds are decomposed within 170–350 °C, and silver and platinum are reduced to a metallic state, while a metastable single-phase solid solution of Ag0.67Pt0.33 is formed. The catalytic activity of the resulting nanoalloy Ag0.67Pt0.33 is studied in the reaction of CO total (TOX) and preferential (PROX) oxidation. Ag0.67Pt0.33 enhanced Pt nano-powder activity in CO TOX, but was not selective in CO PROX.

Filatov E. , Smirnov P. , Potemkin D. , Pishchur D. , Kryuchkova N. , Plyusnin P. , Korenev S.
Formation of Catalytically Active Nanoparticles under Thermolysis of Silver Chloroplatinate(II) and Chloroplatinate(IV)
Molecules. 2022. V.27. N4. 1173 :1-15. DOI: 10.3390/molecules27041173 WOS Scopus РИНЦ CAPlus PMID OpenAlex

Поступила в редакцию:	24 дек. 2021 г.
Принята к публикации:	8 февр. 2022 г.
Опубликована в печати:	9 февр. 2022 г.
Опубликована online:	9 февр. 2022 г.

Web of science:	WOS:000764302000001
Scopus:	2-s2.0-85124599183
РИНЦ:	48150895
Chemical Abstracts:	2022:575058
PMID (PubMed):	35208959
OpenAlex:	W4221028940

БД	Цитирований
Scopus	3
Web of science	3
РИНЦ	4
OpenAlex	3