Catalytic reduction of carbon dioxide into methanol over copper under hydrothermal conditions

Applications of supercritical technologies to CO2 reduction: Catalyst development and process intensification

“…In this process, Zn acts as reductant, and the ZnO thus formed acts as catalyst. In further studies of the same authors it has been reported that employing Cu as catalyst and Zn as reductant, the formic acid initially obtained by hydrothermal conversion of CO 2 is further converted to methanol [55].…”

H2‐free Synthesis of Aromatic, Cyclic and Linear Oxygenates from CO2

“…Therefore, iron can be considered as a catalyst and may also play a role in directing secondary reactions resulting in the formation ≥C 2 products. It should be noted that other relatively Earth‐abundant metals with low redox potential, such as zinc, are also useful catalysts for CO 2 reduction . Low‐reduction‐potential metals have been combined with other catalytic substances, particularly nickel and copper, to enhance reaction kinetics and yields.…”

“…C 2 products.I t should be noted that other relatively Earth-abundantm etals with low redox potential, such as zinc, are also useful catalysts for CO 2 reduction. [29,30] Low-reduction-potential metalsh ave been combined with other catalytic substances, particularly nickel [31,32] and copper, [29,33,34] to enhancer eactionk inetics and yields. Additionally,r educing agentss uch as glycerol, [35] biomass derivatives [36] and microalgae [37] have been effective in converting CO 2 to HCOOH.…”

Pd/C‐catalyzed reduction of NaHCO3 into formate with 2‐pyrrolidone under hydrothermal conditions

“…16 Our recent research has shown that, with the in situ formed hydrogen from the reaction of earth-abundant metals (Fe, Zn, Mg Al and Mg) as both reductant and catalyst, CO 2 can be efficiently reduced into useful chemicals such as acetic acid, formic acid, and methane under hydrothermal conditions. [17][18][19][20][21] However, in these methods, metals are oxidized after the reaction and thus regeneration of the metal reductants is required. Therefore, further developing this hydrothermal method for CO 2 reduction with renewable materials to replace the metal reductants is needed and attractive.…”

“…[8][9][10][11][12] Studies on CO 2 -bearing aqueous fluids with magnetite, 12 cobalt-bearing magnetite, 13 iron-chromium oxide, 14,15 have shown that reduction of CO 2 is achieved with metals under hydrothermal conditions. [17][18][19][20][21] However, in these methods, metals are oxidized after the reaction and thus regeneration of the metal reductants is required. 16 Our recent research has shown that, with the in situ formed hydrogen from the reaction of earth-abundant metals (Fe, Zn, Mg Al and Mg) as both reductant and catalyst, CO 2 can be efficiently reduced into useful chemicals such as acetic acid, formic acid, and methane under hydrothermal conditions.…”