CO oxidation on a copper-modified Pt(111) surface

A spatially resolved investigation of oxygen adsorption on polycrystalline copper and titanium by means of photoemission electron microscopy

“…These DU curves reveal significant differences that may give some additional insight into the electronic structure. DU determined for crystallite (6) was very close to crystallite (2). Three different stages can be distinguished from the exposure dependence of DU.…”

“…One observes density oscillations during the chemical reaction between the educts CO and NO or O 2 and the product CO 2 . The CO + O 2 reaction was investigated by means of PEEM in detail, see: [1][2][3][4][5][6][7][8]. PEEM studies of the important NO + O 2 reaction are reported in [9][10][11].…”

Bistability and oscillations in CO oxidation studied with scanning tunnelling microscopy inside a reactor

“…The CO-induced restructuring of the surface therefore modulates the oxygen adsorption, which in turn makes the system oscillate between the low-reactivity, CO-dominated, reconstructed surface and the high-reactivity, O-dominated, unreconstructed surface. The Pt(1 1 1) surface, which does not have a surface reconstruction, shows no oscillations but only bistability under similar low-pressure conditions [14].…”

When an Encapsulating Oxide Layer Promotes Reaction on Noble Metals: Dewetting and In situ Formation of an “Inverted” FeO x /Pt Catalyst

“…The formation of the FeO(111) thin film wetting the Pt(111) substrate in vacuum is a result of decreasing surface energy since oxides usually exhibit the lower surface energy than metals [32]. However, the situation changes under reaction conditions, since it includes also chemical potentials of the gas phase, which in turn depends on partial pressure and temperature.…”