Effects of noble metal-doping on Cu/ZnO/Al2O3 catalysts for water–gas shift reaction

Role of step sites on water dissociation on stoichiometric ceria surfaces

“…Nevertheless, this apparently simple reaction is more complex that imagined and other factors must be considered such as the nature of the support [7,[13][14][15][16], the existence of point defect such as oxygen vacancies [17,18], or the catalyst preparation process [19]. Likewise, subtle modifications of the catalyst by doping with traces of other metals [20,21] or by formation of alloys [22,23] have been found to considerably improve the catalytic performance. Nevertheless, the reaction mechanism, at least for the metallic phase and the low temperature step, is rather well understood, especially after a series of recent papers reporting microkinetic studies based mainly on the rate constants derived from density functional calculations [24][25][26] and the work of Fajin et al [27] highlighting the important role of step sites.…”

Effect of synthesis method on physicochemical and catalytic properties of Cu–Zn-based mesoporous nanocatalysts for water-gas shift reaction

“…To inhibit oxidative sintering, Nishida et al [17] doped Pt in Cu/Zn/Al 2 O 3 using a memory-effect method. Shishido et al [18] found that MgO addition improved both the activity and stability of Cu-Zn-based catalysts via forming or stabilizing Cu ?…”

Influence of aging time on the microstructural characteristics of a Cu/ZnO-based catalyst prepared by homogeneous precipitation for use in methanol steam reforming

“…Typically, most of these catalysts are prepared by coprecipitation using metal salts and a precipitating agent, such as sodium carbonate or sodium hydroxide [6]. Specific precursor phases favor the formation of highly dispersed Cu and Zn oxide mixtures that show high activity after calcination [7].…”