High-pressure X-ray photoelectron spectroscopy of palladium model hydrogenation catalysts.: Part 1: Effect of gas ambient and temperature

TLDR: In this paper, the surface characteristics of palladium β-hydride were investigated as a function of gas-phase (hydrogen, oxygen) and temperature, and it was shown that surface region of catalytic materials behaves dynamically in its composition, always reflecting on its environment.

About: This article is published in Journal of Catalysis.The article was published on 2005-02-15 and is currently open access. It has received 93 citations till now. The article focuses on the topics: Palladium hydride & Palladium.

Figures

Figure 8: Correlation of the total carbon content and the relative amounts of the individual carbon types as a function of the relative amount of adsorbed-induced Pd 3d component. Pd foil data are included. Most of the data points originate from Fig. 2 and 4.

Figure 10: Valence band of Pd foil in the β hydride state (1) and after hydride decomposition (2). RT and ~ 2.3 mbar H2.

Figure 9: Pd 3d (5/2) of Pd foil before hydride formation and as a β hydride.

Figure 1: Pd 3d region of palladium foil in the presence of 3 mbar hydrogen.

Figure 3: C 1s region of palladium foil at different experimental conditions. Incident photon energy, hν = 660 eV. Dashed line: measured data, full line: fits.

Figure 2: C 1s region of palladium foil in the presence of 3 mbar hydrogen.

Frequently asked questions

Q1. What are the contributions in "High-pressure x-ray photoelectron spectroscopy on palladium model hydrogenation catalysts part1: effect of gas ambient and temperature" ?

The authors constructed a synchrotronbased high-pressure XPS ( X-ray photoelectron spectroscopic ) instrument, allowing us to investigate the surface and near-surface state of a catalyst in the mbar pressure range. The authors discuss here the surface characteristics of palladium samples as a function of gas-phase ( hydrogen, oxygen ) and temperature. The authors demonstrate that the surface region of catalytic materials behaves dynamically in its composition, always reflecting on its environment.