Publication
Title
Kinetics of lifetime changes in bimetallic nanocatalysts revealed by quick X-ray absorption spectroscopy
Author
Abstract
Alloyed metal nanocatalysts are of environmental and economic importance in a plethora of chemical technologies. During the catalyst lifetime, supported alloy nanoparticles undergo dynamic changes which are well-recognized but still poorly understood. High-temperature O-2-H-2 redox cycling was applied to mimic the lifetime changes in model Pt13In9 nanocatalysts, while monitoring the induced changes by insitu quick X-ray absorption spectroscopy with one-second resolution. The different reaction steps involved in repeated Pt13In9 segregation-alloying are identified and kinetically characterized at the single-cycle level. Over longer time scales, sintering phenomena are substantiated and the intraparticle structure is revealed throughout the catalyst lifetime. The insitu time-resolved observation of the dynamic habits of alloyed nanoparticles and their kinetic description can impact catalysis and other fields involving (bi)metallic nanoalloys.
Language
English
Source (journal)
Angewandte Chemie: international edition in English. - Weinheim
Publication
Weinheim : 2018
ISSN
1433-7851
0570-0833
Volume/pages
57 :38 (2018) , p. 12430-12434
ISI
000444225100038
Pubmed ID
30067303
Full text (Publisher's DOI)
Full text (open access)
UAntwerpen
Faculty/Department
Research group
Project info
ICKARUS: Intrinsic Catalytic Kinetics Analyzed and Reconciled with Industrial Conditions
ZEOPOREDIFF: Linking Zeolite Porosity to Molecular Diffusion at the Single Crystal Level
CALIPSO: Coordinated Access to Lightsources to Promote Standards and Optimization
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identification
Creation 08.10.2018
Last edited 20.09.2021
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