Preparation Methods and Applications of CuO-CeO2 Catalysts: A Short Review

Abstract

Liu and Flytzani-Stephanopoulos [1] firstly introduced the catalytic systems based on copper oxide, supported on ceria, for the total oxidation of CO and CH4. Accordingly, this system displayed a substantially high activity and stability related to the oxidation of CO. Complete CO conversion occured at about 80 0 C at a space velocity of 45,000 h-1. Thus, in recent years, the high catalytic activity and selectivity of the CuO-CeO2 systems form the basis of their rising popular use in various reactions of environmental, commercial and other

Synthesis of Cu-Ce/KIT-6 materials for SOx removal

“…It is now recognized that the association of CuO and CeO 2 favors the electron transfer at the metal oxides interface resulting in strong interactions between copper and cerium [18,24,32,33] due to the co-existence of copper and cerium species with different environments and/or oxidation states, and the formation of oxygen vacancies [19,29]. Prasad et al [31] have recently reviewed the different methods of preparation of such bimetallic catalysts and indicate that the conditions during the synthesis influence the catalyst properties such as metal dispersion, particles size and porosity (surface area, pore size distribution).…”

“…During the last decades, Cu/Ce based materials have attracted much attention in catalysis, especially in the field of selective CO oxidation [12][13][14][15][16][17][18][19][20], water gas shift reaction [21,22], NOx and/or SOx reduction [23,24], methanol stream reforming [25], VOCs oxidation [26][27][28][29], syngas production [30]. Indeed, the relative abundance and the moderate cost of copper and cerium, that can surpass precious metals in efficiency, make them very attractive in catalysis [31]. It is now recognized that the association of CuO and CeO 2 favors the electron transfer at the metal oxides interface resulting in strong interactions between copper and cerium [18,24,32,33] due to the co-existence of copper and cerium species with different environments and/or oxidation states, and the formation of oxygen vacancies [19,29].…”

Alumina-supported CuO–CeO2–ZrO2Catalysts for CO Oxidation – Preparation and Characterization

“…As a consequence, a variety of methodologies have been developed by different workers for the preparation of high activity CuO-CeO 2 catalysts. Recently, the present authors in their work [31] have reviewed 17 methods of preparation of CuO-CeO 2 catalysts and their various applications.…”

Avaliação de sistemas catalíticos à base de CuO/CeO2 na reação de oxidação preferencial do CO em presença de H2

“…Catalisadores de CuO/CeO 2 têm sido desenvolvidos e apresentados na literatura como uma alternativa bastante promissora para a reação de oxidação preferencial do CO -PROX, tendo em vista os seus excelentes atrativos: baixo custo e elevada seletividade de oxidação do CO [7]. Dentre os catalisadores a base de metais não nobres, o catalisador de cobre suportado em CeO 2 tem sido apontado como o melhor candidato para a reação de oxidação preferencial do CO, pois podem operar dentro da faixa de temperatura 100-200 °C (valores considerados baixos para esse tipo de reação catalítica) com considerável seletividade [7,8]. Sistemas catalíticos a base de CuO/CeO 2 podem ser obtidos por diferentes métodos de síntese de materiais cerâmicos constituídos por óxidos metálicos [5][6][7][8].…”