Methanol synthesis from carbon dioxide at atmospheric pressure over Cu/ZnO catalyst. Role of methoxide species formed on ZnO support

An IR study of methanol steam reforming over ex-hydrotalcite Cu–Zn–Al catalysts

“…This conclusion does not conflict with that reported by Fujita et al [47] that support the redox mechanism for the reverse-WGS reaction over Cu/ZnO. These authors work at very low temperature (165 • C) even if at this temperature the reverse WGS is unfavoured ( G • for the WGS equilibrium is 0 at 830 • C).…”

Cu/Zn-based catalysts improved by adding magnesium for water–gas shift reaction

“…increase in the active site, with decreasing Cu metal particle size. Moreover, hp-Cu/MgO/ZnO (45/2/53) clearly showed the lower values of E a compared with those of hp-Cu/ZnO (45/55), sug- Two plausible mechanisms have been proposed in the shift reaction over Cu catalysts: one is the formate intermediate mechanism [36,39] and another is the surface reduction-oxidation mechanism [40][41][42][43][44]. It was found to be important especially at high pressure to include in the mechanism the synthesis and hydrogenation of formate intermediate [36].…”

Preparation of supported metal catalysts starting from hydrotalcites as the precursors and their improvements by adopting “memory effect”

“…Two plausible mechanisms have been proposed in the shift reaction over Cu catalysts: one is the formate intermediate mechanism [103] and another is the surface reduction-oxidation mechanism [104,105]. In the formate intermediate mechanism, H 2 O dissociates to OH (a) and then OH (a) reacts with CO to form a formate intermediate which finally decomposes to CO 2 .…”