Partial Miscibility of Metals as a Key for Improved Properties Full article
| Conference |
The 8th International Conference on Material Science and Engineering Technology & The 6th International Conference on Chemical and Material Engineering 19-21 Oct 2019 , Singapore |
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| Journal |
Materials Science Forum
ISSN: 0255-5476 , E-ISSN: 1662-9752 |
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| Output data | Year: 2020, Volume: 998, Pages: 151-156 Pages count : 6 DOI: 10.4028/www.scientific.net/MSF.998.151 | ||||||
| Tags | Alumina-Supported Catalysts, CO Oxidation, Partly Miscible Metals, Pt-Ir Nanoalloy, Thermal Stability | ||||||
| Authors |
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| Affiliations |
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Funding (1)
| 1 | Russian Science Foundation | 16-13-10192 |
Abstract:
Platinum and iridium are known to belong to a family of partly miscible metals. On the other hand, these metals are high demanded as active components of the catalysts for a variety of industrially important processes. In the present work, a series of bimetallic Pt-Ir catalysts supported on alumina were prepared using a “single source precursor” concept. The ratio of metals in the alloy was varied from 1:3 to 3:1. The thermal stability and catalytic activity in CO oxidation of the samples were studied in a prompt thermal aging regime. Monometallic Pt/γ-Al2O3 and Ir/γ-Al2O3 samples were used as references. All the studied catalysts were characterized by UV-vis spectroscopy in initial state and after the aging treatment. It was found that the bimetallic nanoparticles being subjected to the high temperature aging at 600 and 800 °C undergo redistribution with further stabilization in a noticeably more active state. The observed increase in the catalytic activity is explained by an enrichment of the particles’ surface with platinum.
Cite:
Vedyagin A.A.
, Plyusnin P.E.
, Kenzhin R.M.
, Stoyanovskii V.O.
, Zadesenets A.V.
, Shubin Y.V.
Partial Miscibility of Metals as a Key for Improved Properties
Materials Science Forum. 2020. V.998. P.151-156. DOI: 10.4028/www.scientific.net/MSF.998.151 Scopus РИНЦ OpenAlex
Partial Miscibility of Metals as a Key for Improved Properties
Materials Science Forum. 2020. V.998. P.151-156. DOI: 10.4028/www.scientific.net/MSF.998.151 Scopus РИНЦ OpenAlex
Dates:
| Submitted: | Oct 22, 2019 |
| Accepted: | Oct 30, 2019 |
| Published online: | Jun 23, 2020 |
Identifiers:
| Scopus: | 2-s2.0-85088298740 |
| Elibrary: | 45456081 |
| OpenAlex: | W3036810874 |