Mechanism study on direct synthesis of glycerol carbonate from CO2 and glycerol over shaped CeO2 model catalysts

Recent advancements in CeO2-enabled liquid acid/base catalysis

“…53,54 Morphology modulation is regarded as a typical and efficient strategy to adjust the base property of CeO 2 , and the strength and density of basic sites could be directly characterized with the help of CO 2 -TPD. 51,52 As shown in previous studies, CeO 2 with different morphology exposes varied facets, in which CeO 2 nanorods exhibit both (111) and (110) facets, generally possessing more oxygen vacancies and low-coordinated Ce species. Meanwhile, the (100) facet is selectively exposed on CeO 2 nanocubes and CeO 2 polyhedra composed of both (111) and (100) facets, while CeO 2 octahedra exhibit only the (111) facet.…”

“…Besides IR spectroscopy, thermal programmed desorption (TPD) of probe molecules adsorbed on CeO 2 is also applied to investigate the strength and number of acid/base sites. 47–52 The pyridine-TPD technique was applied to investigate the number and strength of acidic sites. 48 According to Fig.…”