Water-gas shift reaction on Cu and Au nanoparticles supported on CeO2 and ZnO: Intrinsic activity and importance of support interactions

Jose A. Rodriguez, Xianqin Wang, Ping Liu, Jonathan C. Hanson, Jan Hrbek

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Synchrotron-based techniques (high-resolution photoemission, in-situ X-ray absorption spectroscopy, and time-resolved X-ray diffraction) have been used to study the water-gas shift (WGS, CO + H2O → H2 + CO2) reaction on a series catalysts. Au and Cu nanoparticles supported on CeO2(111) display an extraordinary catalytic activity for the WGS reaction that is not seen on a ZnO(000i) support or for the bulk metal. The behaviour of Au/ceria in the WGS illustrates the essential role that an oxide can have for the activity of supported Au nanocatalysts. In-situ time-resolved x-ray diffraction and x-ray absorption spectroscopy were used to monitor the behavior of nanostructured {Au+AuOx}-CeO2 catalysts under the WGS reaction. At temperatures above 250 C, a complete AuOx→Au transformation was observed with high catalytic activity. The active sites in {Au + AuOx}/ceria catalysts involve pure gold nanoparticles in contact with O vacancies of the oxide support.

Original languageEnglish (US)
Title of host publication233rd ACS National Meeting, Abstracts of Scientific Papers
StatePublished - Dec 28 2007
Externally publishedYes
Event233rd ACS National Meeting - Chicago, IL, United States
Duration: Mar 25 2007Mar 29 2007

Other

Other233rd ACS National Meeting
Country/TerritoryUnited States
CityChicago, IL
Period3/25/073/29/07

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

Fingerprint

Dive into the research topics of 'Water-gas shift reaction on Cu and Au nanoparticles supported on CeO<sub>2</sub> and ZnO: Intrinsic activity and importance of support interactions'. Together they form a unique fingerprint.

Cite this