Pt and Ni were deposited on SiO(2) and TiO(2) substrates by wet impregnation and used as photocatalysts for dry CO(2) reforming of MeH in Ar at 430-510 degrees C under UV irradn. (max. emission at wave length 386 nm). The TiO(2)-supported catalysts showed higher CO(2) adsorption capacity than the SiO(2)-supported ones. The Ni catalysts showed higher activity than the Pt ones independently on the support used. No substantial effect of the catalyst photoactivation was obsd.