Partial miscibility of metals as a key for improved properties

Aleksey A. Vedyagin, Pavel E. Plyusnin, Roman M. Kenzhin, Vladimir O. Stoyanovskii, Andrey V. Zadesenets, Yury V. Shubin

Результат исследования: Публикации в книгах, отчётах, сборниках, трудах конференцийстатья в сборнике материалов конференциинаучнаярецензирование

Аннотация

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.

Язык оригиналаанглийский
Название основной публикацииMaterial Science and Engineering Technology VIII
РедакторыRamesh K. Agarwal
ИздательTrans Tech Publications Ltd
Страницы151-156
Число страниц6
ISBN (печатное издание)9783035716061
DOI
СостояниеОпубликовано - 1 янв 2020
Событие8th International Conference on Material Science and Engineering Technology, ICMSET 2019 - Singapore, Сингапур
Продолжительность: 19 окт 201921 окт 2019

Серия публикаций

НазваниеMaterials Science Forum
Том998 MSF
ISSN (печатное издание)0255-5476
ISSN (электронное издание)1662-9752

Конференция

Конференция8th International Conference on Material Science and Engineering Technology, ICMSET 2019
СтранаСингапур
ГородSingapore
Период19.10.201921.10.2019

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  • Цитировать

    Vedyagin, A. A., Plyusnin, P. E., Kenzhin, R. M., Stoyanovskii, V. O., Zadesenets, A. V., & Shubin, Y. V. (2020). Partial miscibility of metals as a key for improved properties. В R. K. Agarwal (Ред.), Material Science and Engineering Technology VIII (стр. 151-156). (Materials Science Forum; Том 998 MSF). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/MSF.998.151