Activity of CeO x and TiO x Nanoparticles Grown on Au(111) in the Water-Gas Shift Reaction
10.1126/science.1150038
Crossref journal-article
American Association for the Advancement of Science (AAAS)
Science (221)
Abstract

The high performance of Au-CeO 2 and Au-TiO 2 catalysts in the water-gas shift (WGS) reaction (H 2 O + CO→H 2 + CO 2 ) relies heavily on the direct participation of the oxide in the catalytic process. Although clean Au(111) is not catalytically active for the WGS, gold surfaces that are 20 to 30% covered by ceria or titania nanoparticles have activities comparable to those of good WGS catalysts such as Cu(111) or Cu(100). In TiO 2- x /Au(111) and CeO 2- x /Au(111), water dissociates on O vacancies of the oxide nanoparticles, CO adsorbs on Au sites located nearby, and subsequent reaction steps take place at the metal-oxide interface. In these inverse catalysts, the moderate chemical activity of bulk gold is coupled to that of a more reactive oxide.

Bibliography

Rodriguez, J. A., Ma, S., Liu, P., Hrbek, J., Evans, J., & Pérez, M. (2007). Activity of CeO x and TiO x Nanoparticles Grown on Au(111) in the Water-Gas Shift Reaction. Science, 318(5857), 1757–1760.

Authors 6
  1. J. A. Rodriguez (first)
  2. S. Ma (additional)
  3. P. Liu (additional)
  4. J. Hrbek (additional)
  5. J. Evans (additional)
  6. M. Pérez (additional)
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Dates
Type When
Created 17 years, 8 months ago (Dec. 13, 2007, 4:43 p.m.)
Deposited 1 year, 7 months ago (Jan. 10, 2024, 2:49 a.m.)
Indexed 2 weeks, 3 days ago (Aug. 5, 2025, 8:56 a.m.)
Issued 17 years, 8 months ago (Dec. 14, 2007)
Published 17 years, 8 months ago (Dec. 14, 2007)
Published Print 17 years, 8 months ago (Dec. 14, 2007)
Funders 0

None

@article{Rodriguez_2007, title={Activity of CeO x and TiO x Nanoparticles Grown on Au(111) in the Water-Gas Shift Reaction}, volume={318}, ISSN={1095-9203}, url={http://dx.doi.org/10.1126/science.1150038}, DOI={10.1126/science.1150038}, number={5857}, journal={Science}, publisher={American Association for the Advancement of Science (AAAS)}, author={Rodriguez, J. A. and Ma, S. and Liu, P. and Hrbek, J. and Evans, J. and Pérez, M.}, year={2007}, month=dec, pages={1757–1760} }