Influence of Reaction Mixture on the State of Copper during the Selective Alcohol Oxidation

摘要

The catalyst surface may change under the action of reaction mixture. On the basis of the surface electron property measurements, adsorption experiments and isotopic data it is known that the surface and subsurface layers of IB metals contain significant quantity of oxygen, which effects on the adsorption and catalytic properties of the metal surface. According to our recent results it has been shown that the efficiency of complex catalyst consisting of interlacing layers of copper and silver electrolytic crystals is higher than Ag catalyst made of silver crystals only. As compared with silver catalysts the copper systems are not practically studied. The role of the copper in complex catalyst is not finally defined. The process of the carbon deposit formation on the Cu surface could be realized more intensively than on the Ag catalyst. Moreover during the processes of the selective alcohol oxidation the carbon deposit formation on the copper catalyst surface is complicated by the phase transition Cu~0 reversible Cu_2O reversible CuO.