CO2 hydrogenation to methanol over Cu/ZnO/ZrO2 catalysts: Effects of ZnO morphology and oxygen vacancy

Photo-assisted effective and selective reduction of CO2to methanol on a Cu–ZnO–ZrO2catalyst

“…There are no satellite peaks between the peaks of Cu 2p 3/2 and Cu 2p 1/2 , proving that Cu 2+ is entirely reduced to Cu or Cu + in the Cu–ZnO–ZrO 2 and Cu–ZnO catalysts. 28 Due to the low resolution of XPS for the Cu elemental analysis, AES was applied to examine the kinetic energy to determine the chemical states of Cu (Fig. 2b).…”

“…Adsorption of CO 2 at 271.9 1C and 413.2 1C is attributed to the high specific surface area and generation of a large number of O v . 28,35 Many works have confirmed that O v on the catalyst surface is more conducive to CO 2 adsorption, followed by the hydrogenation reaction. 36 UV-Vis spectroscopy was utilized to investigate the light absorption capacity of the catalysts.…”

Hydrogen production by steam reforming of methanol by Cu–Zn/CeAlO3 perovskite

“…ZnO support often offers benefits like spillover effect, copper dispersion, and improvement in the reducibility of CuO. 25 The urea-nitrate combustion method is also exploited to synthesize CuO/ZnO/Al 2 O 3 catalysts promoted by CeO 2 26 and ZrO 2 27 for SRM. Ajamein et al 28 employed propylene glycol as an organic fuel in microwave-aided solution combustion synthesis and assessed the influence of fuel to oxidizer ratio in SRM.…”

Hydrothermal reduction of CO2 captured as NaHCO3 into formate with metal reductants and catalysts

“…There are different alternatives to produce chemicals and fuels from CO 2 , including hydrogenation [9], electrochemical reactions [10] and photochemical reactions [11]. However, these technologies still show low yields and high cost and, therefore, further development is necessary [12].…”