CO oxidation. The high initial activity observed at temperatures down to 230 K was followed
by a gradual decrease. Two main reasons for the catalyst deactivation were found:(i)
adsorption of CO and its accumulation as carbonates, this deactivation being reversible and
after heating the catalyst surface being restored by CO2 evolution,(ii) agglomeration of Au
particles, which causes irreversible however weak deactivation. IR, XPS and TPD data were …