HCHO Catalytic Oxidation Performance over Cerium Containing MCM-41 Type Mesoporous Materials Supported Ag Catalysts

Acid pretreatment of support promotes Pd/SiO2 activity for formaldehyde oxidation at room temperature

“…The broad band can be assigned to ν OH of Si-OH or/and surface H 2 O, and the peak at 1629 cm −1 was ascribed to δ OH (H 2 O). 41,42 It was apparent that the amount of surface OH species on SiO 2 (HNO 3 )-R was greater than that on SiO 2 -R, which indicated that acid treatment could increase the OH concentration on the surface of the carrier. After Pd loading, the amounts of surface OH on the Pd/SiO 2 (HNO 3 )-R and Pd/ SiO 2 -R catalysts were decreased compared with those of the corresponding supports.…”

Cerium modification enhances the performance of Pd/USY for formaldehyde catalytic oxidation at room temperature

“…Ceria could enhance the catalytic activity via the metal-support interaction and/or improved dispersion of the active metal component. [22][23][24] In addition, ceria has been shown to possess excellent oxygen storage capacity (OSC). 25 Previous studies found that oxygen vacancies can be produced by the transformation between Ce 3+ and Ce 4+ (4Ce 4+ + O 2− → 2Ce 4+ + 2Ce 3+ + □ + 0.5O 2 (□ represents an empty position)) over ceria-based materials.…”