Insight into the Nature of Active Species of Pt/Al2O3 Catalysts for Low Temperature NH3 Oxidation | Sciact - CRIS-система Института катализа

Insight into the Nature of Active Species of Pt/Al2O3 Catalysts for Low Temperature NH3 Oxidation Научная публикация

Журнал

ChemCatChem
ISSN: 1867-3880 , E-ISSN: 1867-3899

Вых. Данные

Год: 2020, Том: 12, Номер: 3, Страницы: 867-880 Страниц : 13 DOI: 10.1002/cctc.201901719

Ключевые слова

ammonia slip catalyst; NH3; operando spectroscopy; platinum; Pt/Al2O3

Авторы

Svintsitskiy Dmitry A. ^1,2 , Kibis Lidiya S. ^1,2 , Stadnichenko Andrey I. ^1,2 , Slavinskaya Elena M. ^1,2 , Romanenko Anatoly V. ¹ , Fedorova Elizaveta A. ¹ , Stonkus Olga A. ^1,2 , Doronkin Dmitry E. ^3,4 , Marchuk Vasyl ³ , Zimina Anna ^3,4 , Casapu Maria ³ , Grunwaldt Jan‐Dierk ^3,4 , Boronin Andrei I. ^1,2

Организации

1	Boreskov Institute of Catalysis, Pr. Lavrentieva 5, Novosibirsk, 630090, Russia
2	Novosibirsk State University, Pirogova St. 2, Novosibirsk, 630090, Russia
3	Institute for Chemical Technology and Polymer Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 20, Karlsruhe, 76131, Germany
4	Institute of Catalysis Research and Technology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, Eggenstein-Leopoldshafen, 76344, Germany

Информация о финансировании (1)

Российский научный фонд
Helmholtz Association of German Research Centres

18-43-06201/HRSF-0046

Two series of Pt/γ‐Al2O3 catalysts for low temperature NH3 oxidation were prepared using Pt(NO3)4 and H2PtCl6 precursors. Using both precursors results in the formation of small Pt particles (d<1.5 nm), however, Cl‐containing Pt precursors give a higher fraction of highly dispersed Pt species. Such species show high stability against thermal or H2 treatment probably due to the presence of a substantial amount of chlorine on the surface. Treatment of the samples prepared from Pt(NO3)4 with H2 leads to the formation of metallic Pt nanoparticles accompanied by the improvement of catalytic activity in NH3 oxidation at T<200 °C. The main products of ammonia oxidation at temperatures below 250 °C were molecular nitrogen and nitrous oxide with the N2 selectivity reaching 80 %. Operando XANES/EXAFS revealed that even after H2 pretreatment at least 40 % of Pt surface remains in oxidized state under reaction conditions resulting in the appearance of N2O as a by‐product.

Svintsitskiy D.A. , Kibis L.S. , Stadnichenko A.I. , Slavinskaya E.M. , Romanenko A.V. , Fedorova E.A. , Stonkus O.A. , Doronkin D.E. , Marchuk V. , Zimina A. , Casapu M. , Grunwaldt J. , Boronin A.I.
Insight into the Nature of Active Species of Pt/Al2O3 Catalysts for Low Temperature NH3 Oxidation

ChemCatChem. 2020. V.12. N3. P.867-880. DOI: 10.1002/cctc.201901719 WOS Scopus РИНЦ CAPlusCA OpenAlex

Полный текст от издателя

Поступила в редакцию:	11 сент. 2019 г.
Принята к публикации:	15 окт. 2019 г.
Опубликована online:	26 нояб. 2019 г.
Опубликована в печати:	6 февр. 2020 г.

Web of science:	WOS:000499267600001
Scopus:	2-s2.0-85075913520
РИНЦ:	43208280
Chemical Abstracts:	2019:2226028
Chemical Abstracts (print):	172:217150
OpenAlex:	W2981049182

БД	Цитирований
Scopus	51
Web of science	49
РИНЦ	46
OpenAlex	57