Interaction of SO2 with Pt Model Supported Catalysts Studied by XPS Full article
| Journal |
The Journal of Physical Chemistry C
ISSN: 1932-7447 , E-ISSN: 1932-7455 |
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| Output data | Year: 2014, Volume: 118, Number: 38, Pages: 22120-22135 Pages count : 16 DOI: 10.1021/jp5069126 | ||||
| Tags | Catalyst poisoning; Crystal impurities; Mixtures; Platinum; Single crystals; Sulfur dioxide; Surface reactions | ||||
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| Affiliations |
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Funding (1)
| 1 | Russian Science Foundation | 14-23-00146 |
Abstract:
Sulfur dioxide that exists in gaseous reaction media as a reagent or impurity can have various effects, both poisoning and promoting, on oxide-supported platinum catalysts. In this work, the interaction of Al2O3, Pt/Al2O3, CeO2, and Pt/CeO2 thin film model catalysts with SO2 (2.5 mbar) or a SO2 + O2 mixture (5 mbar) was studied by X-ray photoelectron spectroscopy (XPS). SO2 reacts with the bare supports to form mainly sulfite species at 200 °C and mainly sulfate species at 400 °C. For Pt/Al2O3 and Pt/CeO2, the reaction with SO2 produces additionally sulfide species on the platinum surface. Pt/Al2O3 reacts with the SO2 + O2 mixture to yield the sulfide and sulfate species in comparable amounts at ≤200 °C, whereas sulfates become the main product at higher temperatures (300−400 °C). The addition of oxygen to the Pt/CeO2 + SO2 system almost completely suppresses the formation of sulfide species and increases the yield of sulfate. The reduction of ceria accompanies the formation of sulfate; both processes proceed to a greater extent in the presence of supported platinum. To confirm the identification of surface species, the reactions of SO2 and SO2 + O2 with a Pt(111) single crystal were studied as well.
Cite:
Smirnov M.Y.
, Kalinkin A.
, Pashis A.V.
, Prosvirin I.P.
, Bukhtiyarov V.I.
Interaction of SO2 with Pt Model Supported Catalysts Studied by XPS
The Journal of Physical Chemistry C. 2014. V.118. N38. P.22120-22135. DOI: 10.1021/jp5069126 WOS Scopus РИНЦ ANCAN OpenAlex
Interaction of SO2 with Pt Model Supported Catalysts Studied by XPS
The Journal of Physical Chemistry C. 2014. V.118. N38. P.22120-22135. DOI: 10.1021/jp5069126 WOS Scopus РИНЦ ANCAN OpenAlex
Dates:
| Submitted: | Jul 11, 2014 |
| Accepted: | Sep 1, 2014 |
| Published online: | Sep 17, 2014 |
| Published print: | Sep 25, 2014 |
Identifiers:
| Web of science: | WOS:000342396300042 |
| Scopus: | 2-s2.0-84949116547 |
| Elibrary: | 43197890 |
| Chemical Abstracts: | 2014:1487811 |
| Chemical Abstracts (print): | 161:480390 |
| OpenAlex: | W2329679504 |