Influence of preparation methods on performance of CuO/CeO_2 catalysts with high CuO loading for water-gas shift reaction

A series of CuO/CeO_2 catalysts for water-gas shift reaction were prepared by different methods, such as mechanical mixing, solid-state synthesis, hydrothermal, deposition-precipitation and coprecipitation method. The as-prepared catalysts were characterized by XRD, N_2 physisorption and H_2TPR techniques. The influence of preparation methods on the structure of CuO/CeO_2 catalyst and the relationship between their structure and catalytic performance were investigated. The results showed that the catalyst prepared by co-precipitation method favored to form smaller CuO and CeO_2 crystal, larger BET surface area, pore volume and pore size, and exhibited better reduction properties, catalytic activity and stability.