Journal
CATALYSIS LETTERS
Volume 143, Issue 9, Pages 926-935Publisher
SPRINGER
DOI: 10.1007/s10562-013-1075-6
Keywords
Heterogeneous catalysis; EXAFS; XRD; Nanoparticles; CO oxidation
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Funding
- Division of Chemical Sciences, Geosciences, and Biosciences, Office of Basic Energy Sciences, U.S. Department of Energy [DE-AC05-00OR22725]
- Oak Ridge National Laboratory
- US Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-98CH10886]
- Synchrotron Catalysis Consortium [DE-FG02-05ER15688]
- Scientific User Facilities Division, U.S. Department of Energy
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Supported AuCu and AuCuPd catalysts were synthesized through the diffusion of Pd and Cu into Au nanoparticle seeds. When supported on SiO2, the AuCuPd nanoparticles were found to be the most active for the oxidation of CO after being exposed to reductive pretreatment conditions as opposed to oxidative pretreatment conditions. In contrast, AuCu/SiO2 was found to be more active for CO oxidation after the alloy phase was segregated into a Au-CuOx heterostructure. In situ XRD and EXAFS were used to monitor the structural changes of AuCu and AuCuPd catalysts as they were subjected to different pretreatment conditions.
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