Role of the ceria promoter and carrier on the functionality of Cu-based catalysts in the CO2-to-methanol hydrogenation reaction

Catalytic Hydrogenation of CO2 to Methanol: Study of Synergistic Effect on Adsorption Properties of CO2 and H2 in CuO/ZnO/ZrO2 System

“…were adopted, and the positive effects of them have also been documented [15][16][17][18][19][20][21][22][23][24][25][26]. Additionally, the composition, texture of catalysts, and dispersion of metal and oxide phases on the catalysts are also greatly associated with their activities, which can be obtained using a variety of preparation methods [16,23,[27][28][29][30][31] Arena et al [16,21,28,32] used reverse co-precipitation under ultrasound irradiation to obtain a series of Cu-ZnO/ZrO2 catalysts with a remarkable total surface area and high dispersion. Deng et al [7,12] and Bonura et al [32] adopted the oxalate-co-precipitated technique to enhance the catalyst activity, whereas Guo et al [29,33] found that the combustion method was a simple, fast, and valuable route.…”

A Review: CO2 Utilization

“…Al 2 O 3 acts as a refractory oxide and structural promoter to increase the total surface area of catalyst, the distribution of Cu on surface, and the mechanical stability of composite, which can stabilize the Cu/ZnO structure and retard the sintering of Cu particles (Bart and Sneeden, 1987;Chinchen et al, 1988;Toyir et al, 2001b;Wang et al, 2013). However, a negative effect of water was observed due to the hydrophilic nature of the support Al 2 O 3 (Bando et al, 1997;Inui et al, 1997;Bonura et al, 2011).…”

Latest Advances in the Catalytic Hydrogenation of Carbon Dioxide to Methanol/Dimethylether

“…In fact, though the enhanced reactivity of ZrO 2 -promoted Cu systems is generally ascribed to a lower water affinity than commercial alumina-based ones, valuable promoting effects of many oxide promoters and carriers on the functionality of Cu catalyst have been documented [2,4,[28][29][30][31][32]. In this context, the lack of definitive evidences on the CO 2 -hydrogenation mechanism of oxide-promoted Cu systems represents to date a major drawback for further catalyst advances [2,[29][30][31][32]. Despite the methanol synthesis reactions network on metal Cu has been thoroughly described by a classical Langmuir-Hinshelwood (L-H) model [17,33,34], a mix of structural, electronic and chemical effects is invoked to explain the positive influence of oxide promoters on the CO 2 -hydrogenation pattern of Cu catalyst [2,4,[28][29][30][31][32].…”

“…In fact, apart from the generally recognised indispensable promoting influence of ZnO on the catalytic functionality of Cu [2,4,30,33,[35][36][37][38][39], the lack of relationships between metal exposure (MSA) and activity seems to depend on a strong "synergism" of metal and oxide phases controlling texture, exposure of active sites and interaction with reagents, products and intermediates.…”