ISSN:
1572-879X
Keywords:
Carbon dioxide
;
oxygenated Cu(110)
;
thermal desorption
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract Thermal desorption studies of CO2 adsorbed on Cu(110) at 85 K and low pressures reveal nearly 100% dissociation on the oxygen-free surface to give adsorbed oxygen and CO. By oxygen predosing a pronounced molecular adsorption state at 100 K is induced with up to a twenty-fold coverage increase, which cannot be explained by simply considering the dissociation equilibrium on the surface. Probably new sites are generated by oxygen as indicated by a pronounced increase of the sticking coefficient. The adsorbed amount of CO2 in dependence on oxygen dose at 85 K exhibits a maximum, which is tentatively attributed to the dynamics of the surface due to oxygen induced reconstruction ((1×1) → p(2×1)). On polycrystalline copper enhanced CO2 dissociation is observed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00765233
