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Promotional effect of the base metal on bimetallic Au-Ni/CeO2 catalysts prepared from core-shell nanoparticles

AuthorsHolgado, Juan P. ; Ternero, Fátima ; González-Delacruz, V.M. ; Caballero, Ainhoa
Issue Date2013
CitationACS Catalysis 3: 2169- 2180 (2013)
AbstractA set of three catalysts (a Au-Ni bimetallic and their corresponding Au and Ni monometallics) has been prepared by impregnation of previously prepared suspensions of monodisperse metallic particles to ensure the precise control of their physicochemical characteristics (size and composition). The Au-Ni/CeO 2 bimetallic catalysts present better reactivity toward CO oxidation than monometallic Au/CeO2 and Ni/CeO2 prepared under identical conditions. >operando-like> characterization of Ni and Au atoms into the bimetallic particles using, among other techniques, ambient-pressure photoelectron spectroscopy and diffuse reflectance infrared Fourier transform spectroscopy has allowed us to determine that under oxidative conditions the samples present a Au@NiO core-shell distribution, where Ni surface atoms are affected by an electronic effect from inner Au atoms. © 2013 American Chemical Society.
Identifiersdoi: 10.1021/cs400293b
issn: 2155-5435
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