Insight into the Contribution of Cerium Oxide to MnO_x/CeO₂ in Methanol Oxidation Reaction: Perspective From the Crystal Facet of CeO₂

Abstract

In this study, cerium oxide with different exposed crystal facets was prepared and function as the support for MnO x /CeO 2 catalysts, whose catalytic performance were evaluated in the methanol oxidation reaction. The results showed that the difference in crystal facet exposure could remarkably affect the methanol oxidation performance of the MnO x /CeO 2 catalysts, where the (110) facet exposure is more beneficial to the catalytic performance. A series of characterizations revealed that the best performance of the MnO x /CeO 2 -NS catalyst can be attributed to the increase of oxygen vacancies and a more suitable valence state distribution, which is intrinsically correlated with the exposed (110) facet, resulting in excellent methanol oxidation performance with T 50 = 156 °C, T 90 = 171 °C, better stability and preferable H 2 O/CO 2 resistance. This work might provide a fundamental understanding for the rational design and optimization of manganese-cerium oxide catalysts for the methanol oxidation reaction.

Metal–organic framework derived N‐doped zinc oxide carbon nanocomposites for catalytic removal of dye and formaldehyde

“…Subsequently, the DOM rapidly converted into formate species (HCOO‐) followed by decomposition into adsorbed CO and H 2 O. Finally, the adsorbed CO oxidized to CO 2 by active oxygen species or O 2 gas 49–51 . The exhibit excellent catalytic performance to HCHO of the ZnO/N/C nanocomposites is mainly attributed to two reasons.…”

“…Finally, the adsorbed CO oxidized to CO 2 by active oxygen species or O 2 gas. [49][50][51] The exhibit excellent catalytic performance to HCHO of the ZnO/N/C nanocomposites is mainly attributed to two reasons. First, the nanocomposites have a large specific surface area and unique porous structure, and it is easy to achieve the adsorption of HCHO.…”