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Combined Macroscopic, Nanoscopic, and Atomic‐Scale Characterization of Gold–Ruthenium Bimetallic Catalysts for Octanol Oxidation
Author(s) -
Chinchilla Lidia E.,
Olmos Carol,
Kurttepeli Mert,
Bals Sara,
Van Tendeloo Gustaaf,
Villa Alberto,
Prati Laura,
Blanco Ginesa,
Calvino José J.,
Chen Xiaowei,
Hungría Ana B.
Publication year - 2016
Publication title -
particle and particle systems characterization
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.877
H-Index - 56
eISSN - 1521-4117
pISSN - 0934-0866
DOI - 10.1002/ppsc.201600057
Subject(s) - bimetallic strip , catalysis , ruthenium , materials science , nanoscopic scale , characterization (materials science) , nanoparticle , sintering , metal , chemical engineering , oxide , transmission electron microscopy , ruthenium oxide , transition metal , nanotechnology , inorganic chemistry , chemistry , metallurgy , organic chemistry , engineering
A series of gold–ruthenium bimetallic catalysts of increasing Au:Ru molar ratios supported on a Ce 0.62 Zr 0.38 O 2 mixed oxide are prepared and their structural and chemical features characterized by a combination of macroscopic and atomic‐scale techniques based on scanning transmission electron microscopy. The influence of the temperature of the final reduction treatment used as activation step (350–700 °C range) is also investigated. The preparation method used allows catalysts to be successfully prepared where a major fraction of the metal nanoparticles is in the size range below 5 nm. The structural complexities characteristic of this type of catalysts are evidenced, as well as the capabilities and limitations of both the macroscopic and microscopic techniques in the characterization of the system of metal nanoparticles. A positive influence of the addition of Ru on both the resistance against sintering and the catalytic performance of the starting supported Au catalyst is evidenced.