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Selective oxidation of CO that is in mixtures enriched in H2 was studied to investigate catalytic properties of the 0.5—80% CuO/Ce0.7Zr0.3O2 system. The catalysts were prepared by the combined decomposition of copper, cerium, and zirconyl nitrates at 300 °C. The systems studied are active and stable under mild conditions of the process (80—160 °C) and at high space velocities (to 100000 h–1) of the...