Self-Regeneration Effect of Three-Way Catalysts during Thermal Aging Procedure

Self-Regeneration Effect of Three-Way Catalysts during Thermal Aging Procedure Научная публикация

Журнал

Catalysts
ISSN: 2073-4344

Вых. Данные

Год: 2020, Том: 10, Номер: 11, Номер статьи : 1257, Страниц : 11 DOI: 10.3390/catal10111257

Авторы

Alikin Evgeny A. ¹ , Denisov Sergey P. ¹ , Bubnov Konstantin V. ¹ , Vedyagin Aleksey A. ²

Организации

1	Research & Development Department, Ecoalliance Limited Liability Company, Novouralsk 624131, Russia
2	Department of Materials Science and Functional Materials, Boreskov Institute of Catalysis SB RAS, Novosibirsk 630090, Russia

One of the most important features of the three-way catalysts is their long-term stability. However, quite often, promising catalytic compositions with excellent activity become deactivated after a relatively short period of exploitation due to various reasons. Therefore, a study on the onboard regeneration of the deactivated three-way catalysts remains its actuality. The present work is mainly focused on the self-regeneration effect of the rhodium-containing component. Aging of the catalysts in the standard and model engine braking regimes revealed the difference in the catalytic performance. Deactivated rhodium species turned to the active state as a result of rapid cooling in air flow from 1200 to 600 °C. The regenerated catalyst shows improved activity towards NOx reduction and, therefore, widened operation window, which indicates higher accessibility of the rhodium species. X-ray diffraction analysis of the aged catalysts does not reveal any noticeable phase changes. Contrary, significant changes in the Rh oxidation state were registered by X-ray photoelectron spectroscopy. The observed effect opens new horizons for the development of the onboard purification systems with prolonged exploitation lifetime.

Alikin E.A. , Denisov S.P. , Bubnov K.V. , Vedyagin A.A.
Self-Regeneration Effect of Three-Way Catalysts during Thermal Aging Procedure

Catalysts. 2020. V.10. N11. 1257 :1-11. DOI: 10.3390/catal10111257 WOS Scopus РИНЦ CAPlus OpenAlex Sciact

Полный текст от издателя

Поступила в редакцию:	5 окт. 2020 г.
Принята к публикации:	26 окт. 2020 г.
Опубликована online:	30 окт. 2020 г.
Опубликована в печати:	1 нояб. 2020 г.

Web of science:	WOS:000592848600001
Scopus:	2-s2.0-85096562044
РИНЦ:	45164590
Chemical Abstracts:	2020:2326316
OpenAlex:	W3096244763
Sciact:	38447

БД	Цитирований
Scopus	4
OpenAlex	5