CORRELATION BETWEEN THE ACTIVITY AND SURFACE-COMPOSITION OF NIO-CUO-CEMENT CATALYSTS IN HYDROGENATION OF OXYGEN

The activity of two independently synthesized batches of NiO-CuO catal ysts supported on alumocalcium cement (Talum) was compared in hydrogen ation of oxygen and it was shown that the method of synthesis of these catalysts ensures the reproducibility of their catalytic activity. Tw o activity levels are observed as a function of the composition of the catalyst: high, for CuO and solid solutions based on CuO, and low, fo r NiO and solid solutions based on NiO. It was found that deviating fr om the optimum conditions in processing the catalyst during activity t ests can perturb the optimum surface state and significantly reduce th e activity for samples rich in nickel.