Structural Insight into Strong Pt–CeO2 Interaction: From Single Pt Atoms to PtOx Clusters | Sciact - CRIS-система Института катализа

Structural Insight into Strong Pt–CeO2 Interaction: From Single Pt Atoms to PtOx Clusters Научная публикация

Журнал

The Journal of Physical Chemistry C
ISSN: 1932-7447 , E-ISSN: 1932-7455

Вых. Данные

Год: 2019, Том: 123, Номер: 2, Страницы: 1320-1334 Страниц : 15 DOI: 10.1021/acs.jpcc.8b11009

Ключевые слова

Water-Gas-Shift; Ray Photoelectron-Spectroscopy; Temperature Co Oxidation; Catalytic-Properties; Pt/CeO2 Catalysts; Platinum Nanoparticles; Lattice-Relaxation; Pd/CeO2 Catalysts; Local-Structure; Defect Sites

Авторы

Derevyannikova Elizaveta A. ¹ , Kardash Tatyana Yu ^1,2 , Stadnichenko Andrey I. ^1,2 , Stonkus Olga A. ^1,2 , Slavinskaya Elena M. ^1,2 , Svetlichnyi Valery A. ³ , Boronin Andrei I. ^1,2

Организации

1	Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences, Prospekt Akademika Lavrentieva 5, Novosibirsk 630090, Russia
2	Novosibirsk State University, Pirogova Street 2, Novosibirsk 630090, Russia
3	Tomsk State University, Lenina Av. 36, Tomsk 634050, Russia

Информация о финансировании (2)

1	Федеральное агентство научных организаций России	0303-2016-0003
2	Российский фонд фундаментальных исследований	17-03-00754

Pt–CeO2 nanocomposites were obtained by coprecipitation, varying the Pt loading over a wide range of 1–30 wt %. The samples were calcined in air at 450–1000 °C. The Pt–CeO2 nanocomposites were investigated by a set of structural (X-ray diffraction, extended X-ray absorption fine structure (EXAFS), pair distribution function (PDF), and transmission electron microscopy) and spectroscopic (X-ray photoelectron spectroscopy and Raman spectroscopy) methods. Over the whole range of Pt loading, the main species were Pt2+ and Pt4+. They were localized either in a single-atom state or in the form of PtOx clusters on the ceria surface. The joint PDF and EXAFS modeling based on the combination of [Pt2+O4] single-atom and Pt3O4 structural fragments allowed us to propose the local structure of the PtOx clusters. The formation of such surface structures is associated with a distorted ceria surface on the Pt–CeO2 nanocomposites. We assume that the close arrangement of platinum ions in the PtOx clusters could be responsible for the effective redox properties of the samples.

Derevyannikova E.A. , Kardash T.Y. , Stadnichenko A.I. , Stonkus O.A. , Slavinskaya E.M. , Svetlichnyi V.A. , Boronin A.I.
Structural Insight into Strong Pt–CeO2 Interaction: From Single Pt Atoms to PtOx Clusters
The Journal of Physical Chemistry C. 2019. V.123. N2. P.1320-1334. DOI: 10.1021/acs.jpcc.8b11009 WOS Scopus РИНЦ CAPlus OpenAlex

Поступила в редакцию:	13 нояб. 2018 г.
Принята к публикации:	24 дек. 2018 г.
Опубликована online:	27 дек. 2018 г.
Опубликована в печати:	17 янв. 2019 г.

Web of science:	WOS:000456350600035
Scopus:	2-s2.0-85060134355
РИНЦ:	38659113
Chemical Abstracts:	2018:2603788
OpenAlex:	W2907267855

БД	Цитирований
Scopus	87
Web of science	86
РИНЦ	80
OpenAlex	86