Strong Response of Pt Clusters to the Environment and Conditions, Formation of Metastable States, and Simple Methods to Trace the Reversible Changes Full article
| Journal |
PCCP: Physical Chemistry Chemical Physics
ISSN: 1463-9076 , E-ISSN: 1463-9084 |
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| Output data | Year: 2021, Volume: 23, Number: 39, Pages: 22718-22732 Pages count : 15 DOI: 10.1039/d1cp01484f | ||
| Tags | Carbon monoxide; Inert gases; Platinum; Trace elements | ||
| Authors |
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| Affiliations |
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Funding (1)
| 1 | Ministry of Science and Higher Education of the Russian Federation | 0239-2021-0010 |
Abstract:
Subnanometric metal particles, the so-called "clusters", are known to be responsive to their surroundings, but the detection of occurring changes, understanding the causes, and predicting the consequences are still extremely difficult for such small particles. Our study was aimed at estimating the potential of adsorption-based methods for these purposes. Using carbon monoxide as a probing molecule, which readily adsorbs on both bare and H-covered Pt surface, we have probed the adsorption properties of highly dispersed Pt/gamma-Al2O3 samples after treatments under different atmospheres and temperatures (H-2 or inert gas, 25-500 degrees C). The combined results of CO-chemisorption measurements, CO TPD, CO TPO, H-2-by-CO displacement, and H-2 TPD suggest that the system shuttles between two states: one with oxygen vacancies in the support and the other one with redox-active oxygen near the Pt clusters. These extreme states can be reversibly created and deleted, giving rise to innumerable intermediate structures that differ in the amount, binding strength, and/or reactivity of adsorbed species. Two adsorbates could act cooperatively, resulting in hydrogen spillover onto the support and making the adsorbate-metal-support interactions even more complex. Implications for better understanding the dynamic behavior of oxide-supported clusters and nanoparticles are discussed.
Cite:
Lisitsyn A.S.
, Kadtsyna A.S.
Strong Response of Pt Clusters to the Environment and Conditions, Formation of Metastable States, and Simple Methods to Trace the Reversible Changes
PCCP: Physical Chemistry Chemical Physics. 2021. V.23. N39. P.22718-22732. DOI: 10.1039/d1cp01484f WOS Scopus РИНЦ ANCAN PMID OpenAlex
Strong Response of Pt Clusters to the Environment and Conditions, Formation of Metastable States, and Simple Methods to Trace the Reversible Changes
PCCP: Physical Chemistry Chemical Physics. 2021. V.23. N39. P.22718-22732. DOI: 10.1039/d1cp01484f WOS Scopus РИНЦ ANCAN PMID OpenAlex
Dates:
| Submitted: | Apr 6, 2021 |
| Accepted: | Sep 14, 2021 |
| Published online: | Sep 15, 2021 |
| Published print: | Oct 21, 2021 |
Identifiers:
| Web of science: | WOS:000703747200001 |
| Scopus: | 2-s2.0-85117192107 |
| Elibrary: | 47513441 |
| Chemical Abstracts: | 021:2024765 |
| Chemical Abstracts (print): | 178:55581 |
| PMID: | 34605497 |
| OpenAlex: | W3199077839 |