Effect of TiO2, ZrO2, and TiO2–ZrO2 on the performance of CuO–ZnO catalyst for CO2 hydrogenation to methanol

Catalytic Intermediates of CO2 Hydrogenation on Cu(111) Probed by In Operando Near‐Ambient Pressure Technique

“…This is because more surface oxygen will diffuse into the Cu lattice to form Cu 2 O, which is triggered by the boosted thermal energy at high temperatures. [58,59] The above results clearly imply that the active surface of Cu can be maintained by deliberately controlling the amount of Figure 5. Althoughm ore CH/ C(ato) is likely to be converted into graphitic carbon with increasingt emperature owing to the enhanced diffusion of CH/ C(ato), [36,52,53] the peak area of graphitic carbon still shows adecliningt rend, as presented in the C1sr egion.…”

“…[51] The peak area of the CuÀOp hase (atomico xygen and Cu 2 O) continues to increase until 550 K, which indicates the enhanced CO 2 dissociation process at higher temperatures. [58,59] This is mainly due to the increased generation of the CuÀOp hase as ar esult of the enhanced CO 2 dissociation at elevated temperatures, and the CuÀOp hase may consumet he graphitic carbon to give rise to desorption of CO or CO 2 from the catalysts urface.…”

Effect of Oxide Coating on Performance of Copper-Zinc Oxide-Based Catalyst for Methanol Synthesis via Hydrogenation of Carbon Dioxide

“…On the other hand, the temperature peaks of the catalysts coated with silica, zirconia, and titania using L(+)-arginine were 585.0, 591.0, and 590.0 K, respectively. It is reported that reconstruction of the active copper particles occurred with the addition of TiO 2 [25,26,27]. The result indicates that the active copper species in the TiO 2 -coated catalyst prepared using L(+)-arginine show broader dispersion than those in the pristine catalyst.…”

“…These results indicated that silica and titania coatings on the F04M catalyst effectively improved methanol selectivity. It is reported that the addition of TiO 2 improves the methanol selectivity because of the reconstruction of the active copper particles and/or its acid-base property, which controls the stability of the reaction intermediate [25,26,27]. …”

Catalytic Performance of Cu/ZnO/A12O3/ZrO2 for Slurry Methanol Synthesis from CO2 Hydrogenation: Effect of Cu/Zn Molar Ratio

“…As depicted above, the CO 2 conversion over the CZAZ catalyst increased progressively with the increase of Cu/Zn molar ratio and it is consistent with the change of the specific surface area, SA BET (Table 1). Several studies have demonstrated that there are two active centers involved in the catalytic process of CO 2 hydrogenation over the Cu/ZrO 2 -based catalysts (Lin et al 2009;Raudaskoski et al 2007;Sloczynski et al 2004;Xiao et al 2015). One is the Cu component, and the other is the so-called 'support' ZrO 2 .…”