A DRIFTS study of the morphology and surface adsorbate composition of an operating methanol synthesis catalyst

Effect of pressure on the mechanisms of the CO2/H2 reaction on a CO-precipitated CuO/ZnO/Al2O3 catalyst

“…Previous studies on CuO/ZnO/Al 2 O 3 [32][33][34] suggest that the formate and carbonate unidendate or bidendate species [35,36] were formed when the Cubased catalyst was exposed to CO 2 /H 2 or CO/CO 2 /H 2 at low temperatures, and carbonate species were transformed to stable formate species by hydrogenation which are then reduced to methoxy [37] and further hydrogenated to methanol. On the other hand, Fujitani et al [38], who worked on the Pd/Ga 2 O 3 catalyst, reported that surface formate and methoxy species were observed during CO and CO 2 hydrogenation.…”

IR-Spectroscopic Study on the Interface of Cu-Based Methanol Synthesis Catalysts: Evidence for the Formation of a ZnO Overlayer

“…Due to the high copper content (50-70 wt%) in industrial relevant Cu/ZnO/Al 2 O 3 (Al 2 O 3 as phase, higher Al-content of 10-15 wt%) methanol synthesis catalysts, infrared studies of probe molecule adsorption on realistic systems and operando investigations are, however, limited [9][10][11][12]. Frequently, FTIR studies have been performed on model catalysts with lower copper contents or after dilution [13][14][15][16][17][18][19].…”

Investigation of the behaviour of a Pd/γ-Al2O3 catalyst during methane combustion reaction using in situ DRIFT spectroscopy

“…Indeed, a better view of the phenomena occurring during the reaction process should be provided by the knowledge of the adsorbed compounds, while the catalyst is working [33][34][35], since the surface of a working catalyst is usually strongly different from that of the fresh catalyst [36]. Therefore, we used the in situ DRIFTS technique, which allows studying the evolution of the adsorbed species, intermediates and products inside the cell, which acts as a reactor.…”