“…The Cu-ZnO/Al 2 O 3 catalysts have a considerably high activity for methanol synthesis from syngas. However, their unsatisfactory CO 2 hydrogenation performance, due to a negative effect of water in the presence of the hydrophilic alumina carrier [7,8], is pressing the discovery of alternative catalyst formulations including copper as activity phase and various oxide supports and promoters like ZnO [9], Al 2 O 3 [10,11], TiO 2 [11][12][13][14][15], SiO 2 [11,15], ZrO 2 [15][16][17][18][19], CeO 2 [20,21] or their combinations [20][21][22]. Among the additives studied, ZnO, ZrO 2 and TiO 2 are very promising catalyst supports and/or promoters.…”