Structural Insight into Strong Pt–CeO2 Interaction: From Single Pt Atoms to PtOx Clusters Full article
| Journal |
The Journal of Physical Chemistry C
ISSN: 1932-7447 , E-ISSN: 1932-7455 |
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| Output data | Year: 2019, Volume: 123, Number: 2, Pages: 1320-1334 Pages count : 15 DOI: 10.1021/acs.jpcc.8b11009 | ||||||
| Tags | 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 | ||||||
| Authors |
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| Affiliations |
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Funding (2)
| 1 | Russian Foundation for Basic Research | 17-03-00754 |
| 2 | Federal Agency for Scientific Organizations | 0303-2016-0003 |
Abstract:
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.
Cite:
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 OpenAlex AN
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 OpenAlex AN
Dates:
| Submitted: | Nov 13, 2018 |
| Accepted: | Dec 24, 2018 |
| Published online: | Dec 27, 2018 |
| Published print: | Jan 17, 2019 |
Identifiers:
| ≡ Web of science: | WOS:000456350600035 |
| ≡ Scopus: | 2-s2.0-85060134355 |
| ≡ Elibrary: | 38659113 |
| ≡ OpenAlex: | W2907267855 |
| ≡ Chemical Abstracts: | 2018:2603788 |