Jump to main content
Jump to site search


In situ formation of the active sites in Pd–Au bimetallic nanocatalysts for CO oxidation: NAP (near ambient pressure) XPS and MS study

Author affiliations

Abstract

Model bimetallic Pd–Au/HOPG catalysts have been investigated in the CO oxidation reaction using a combination of NAP XPS and MS techniques. The samples have shown catalytic activity at temperatures above 150 °C. The redistribution of Au and Pd on the surface depending on the reaction conditions has been demonstrated using NAP XPS. The Pd enrichment of the bimetallic particles’ surface under reaction gas mixture has been shown. Apparently, CO adsorption induces Pd segregation on the surface. Heating the sample under reaction conditions above 150 °C decomposes the Pd–CO state due to CO desorption and reaction and simultaneous Pd–Au alloy formation on the surface takes place. Cooling back down to RT results in reversible Pd segregation due to Pd–CO formation and the sample becomes inactive. It has been shown that in situ studies are necessary for investigation of the active sites in Pd–Au bimetallic systems.

Graphical abstract: In situ formation of the active sites in Pd–Au bimetallic nanocatalysts for CO oxidation: NAP (near ambient pressure) XPS and MS study

Back to tab navigation

Publication details

The article was received on 19 Dec 2017, accepted on 24 Jan 2018 and first published on 24 Jan 2018


Article type: Paper
DOI: 10.1039/C7FD00219J
Citation: Faraday Discuss., 2018, Advance Article
  •   Request permissions

    In situ formation of the active sites in Pd–Au bimetallic nanocatalysts for CO oxidation: NAP (near ambient pressure) XPS and MS study

    A. V. Bukhtiyarov, I. P. Prosvirin, A. A. Saraev, A. Yu. Klyushin, A. Knop-Gericke and V. I. Bukhtiyarov, Faraday Discuss., 2018, Advance Article , DOI: 10.1039/C7FD00219J

Search articles by author

Spotlight

Advertisements