Influence of Titania Synthesized by Pulsed Laser Ablation on the State of Platinum during Ammonia Oxidation Full article
| Journal |
Applied Sciences (Switzerland)
ISSN: 2076-3417 |
||||||
|---|---|---|---|---|---|---|---|
| Output data | Year: 2020, Volume: 10, Number: 14, Article number : 4699, Pages count : 25 DOI: 10.3390/app10144699 | ||||||
| Tags | Pt/TiO2; NH3 oxidation; pulsed laser ablation; XPS | ||||||
| Authors |
|
||||||
| Affiliations |
|
Funding (1)
| 1 |
Russian Science Foundation Helmholtz Association of German Research Centres |
18-43-06201/HRSF-0046 |
Abstract:
A set of physicochemical methods, including X-ray photoelectron spectroscopy (XPS), X-ray diraction, electron microscopy and X-ray absorption spectroscopy, was applied to study Pt/TiO2 catalysts prepared by impregnation using a commercial TiO2-P25 support and a support produced by pulsed laser ablation in liquid (PLA). The Pt/TiO2-PLA catalysts showed increased thermal stability due to the localization of the highly dispersed platinum species at the intercrystalline boundaries of the support particles. In contrast, the Pt/TiO2-P25 catalysts were characterized by uniform distribution of the Pt species over the support. Analysis of Pt4f XP spectra shows that oxidized Pt2+ and Pt4+ species are formed in the Pt/TiO2-P25 catalysts, while the platinum oxidation state in the Pt/TiO2-PLA catalysts is lower due to stronger interaction of the active component with the support due to strong interaction via Pt-O-Ti bonds. The Pt4f XP spectra of the samples after reaction show Pt2+ and metallic platinum, which is the catalytically active species. The study of the catalytic properties in ammonia oxidation showed that, unlike the catalysts prepared with a commercial support, the Pt/TiO2-PLA samples show higher stability during catalysis and significantly higher selectivity to N2 in a wide temperature range of 200–400 C.
Cite:
Stadnichenko A.
, Svintsitskiy D.
, Kibis L.
, Fedorova E.
, Stonkus O.
, Slavinskaya E.
, Lapin I.
, Fakhrutdinova E.
, Svetlichnyi V.
, Romanenko A.
, Doronkin D.
, Marchuk V.
, Grunwaldt J-D.
, Boronin A.
Influence of Titania Synthesized by Pulsed Laser Ablation on the State of Platinum during Ammonia Oxidation
Applied Sciences (Switzerland). 2020.
V.10. N14. 4699
:1-25. DOI: 10.3390/app10144699
WOS
Scopus
РИНЦ
AN
OpenAlex
Influence of Titania Synthesized by Pulsed Laser Ablation on the State of Platinum during Ammonia Oxidation
Applied Sciences (Switzerland). 2020.
V.10. N14. 4699
:1-25. DOI: 10.3390/app10144699
WOS
Scopus
РИНЦ
AN
OpenAlex
Files:
Full text from publisher
Dates:
| Submitted: | Jun 14, 2020 |
| Published print: | Jul 1, 2020 |
| Accepted: | Jul 6, 2020 |
| Published online: | Jul 8, 2020 |
Identifiers:
| Web of science: | WOS:000556677100001 |
| Scopus: | 2-s2.0-85088648476 |
| Elibrary: | 45441855 |
| Chemical Abstracts: | 2020:1654844 |
| OpenAlex: | W3041333247 |