Repository: Freie Universit├Ąt Berlin, Math Department

In Situ X-Ray Photoelectron Spectroscopy of Model Catalysts: At the Edge of the Gap

Blomberg, S. and Hoffmann, M. and Gustafson, J. and Martin, N. M. and Fernandes, V. R. and Borg, A. and Liu, Z. and Chang, R. and Matera, S. and Reuter, K. and Lundgren, E. (2013) In Situ X-Ray Photoelectron Spectroscopy of Model Catalysts: At the Edge of the Gap. Physical Review Letters, 110 (11). p. 117601.

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Abstract

We present high-pressure x-ray photoelectron spectroscopy (HP-XPS) and first-principles kinetic Monte Carlo study addressing the nature of the active surface in CO oxidation over Pd(100). Simultaneously measuring the chemical composition at the surface and in the near-surface gas phase, we reveal both O-covered pristine Pd(100) and a surface oxide as stable, highly active phases in the near-ambient regime accessible to HP-XPS. Surprisingly, no adsorbed CO can be detected during high CO2 production rates, which can be explained by a combination of a remarkably short residence time of the CO molecule on the surface and mass-transfer limitations in the present setup.

Item Type:Article
Subjects:Mathematical and Computer Sciences > Mathematics > Applied Mathematics
Divisions:Department of Mathematics and Computer Science > Institute of Mathematics > Geophysical Fluid Dynamics Group
ID Code:2030
Deposited By: Ulrike Eickers
Deposited On:17 Feb 2017 11:22
Last Modified:03 Mar 2017 14:42

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