Результаты исследований: Публикации в книгах, отчётах, сборниках, трудах конференций › статья в сборнике материалов конференции › научная › Рецензирование
Partial miscibility of metals as a key for improved properties. / Vedyagin, Aleksey A.; Plyusnin, Pavel E.; Kenzhin, Roman M. и др.
Material Science and Engineering Technology VIII. ред. / Ramesh K. Agarwal. Trans Tech Publications Ltd, 2020. стр. 151-156 (Materials Science Forum; Том 998 MSF).Результаты исследований: Публикации в книгах, отчётах, сборниках, трудах конференций › статья в сборнике материалов конференции › научная › Рецензирование
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TY - GEN
T1 - Partial miscibility of metals as a key for improved properties
AU - Vedyagin, Aleksey A.
AU - Plyusnin, Pavel E.
AU - Kenzhin, Roman M.
AU - Stoyanovskii, Vladimir O.
AU - Zadesenets, Andrey V.
AU - Shubin, Yury V.
N1 - Publisher Copyright: © 2020 Trans Tech Publications Ltd, Switzerland.
PY - 2020/1/1
Y1 - 2020/1/1
N2 - 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 ℃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.
AB - 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 ℃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.
KW - Alumina-supported catalysts
KW - CO oxidation
KW - Partly miscible metals
KW - Pt-Ir nanoalloy
KW - Thermal stability
UR - http://www.scopus.com/inward/record.url?scp=85088298740&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/21e93962-3f46-3e99-b921-f5da39629ecf/
U2 - 10.4028/www.scientific.net/MSF.998.151
DO - 10.4028/www.scientific.net/MSF.998.151
M3 - Conference contribution
AN - SCOPUS:85088298740
SN - 9783035716061
T3 - Materials Science Forum
SP - 151
EP - 156
BT - Material Science and Engineering Technology VIII
A2 - Agarwal, Ramesh K.
PB - Trans Tech Publications Ltd
T2 - 8th International Conference on Material Science and Engineering Technology, ICMSET 2019
Y2 - 19 October 2019 through 21 October 2019
ER -
ID: 24782477