The composites Cu@SiO2-X were obtained by impregnation of Aerosil or activated carbon (Cu@SiO2-11) with solutions of Cu II complexes (prepared in situ) with 1,2-diaminobenzene (DAB) or 1,10-phenanthroline (Phen) followed by pyrolysis of the samples in an argon atmosphere. Two types of starting compounds were taken, i.e., the complexes containing DAB and Phen. Besides, copper and carbon content, temperature of pyrolysis, and pyrolysis rate were varied to reveal the influence of these factors on the performance of the composites in the catalytic reaction.