Facile Method to Create PdCe-MnO x Catalyst for Decomposing O3 under Humidity Conditions

Manganeseoxides are one of the most promising candidates for ambientdecomposition of O-3. However, catalysts with high efficiencyrequire complicated preparation processes to cultivate active microstructures.This study developed a simple and easy to scale up method to producecatalysts via thermal annealing of Mn precursor. With slight additionof Ce and Pd, the obtained PdCe-MnO x catalyst exhibited excellent O-3 removal activity in thepresence of water vapor. Numerous characterization methods, includingX-ray diffraction, high-resolution transmission electron microscopy,mapping, Brunauer-Emmett-Teller, H-2-temperature-programmedreduction, O-2-temperature-programmed desorption, X-rayphotoelectron spectroscopy, and diffuse reflectance infrared Fouriertransform spectroscopy, were applied to explore the relationship betweenactivity and structure. The slight addition of Pd and Ce not onlyboosts the formation of surface vacancy species but also enhancesthe water vapor resistance, all of which contribute to its excellentozone decomposition performance.

Automated summary

This study developed a simple and scalable method to produce catalysts through thermal annealing of Mn precursor. The obtained PdCe-MnOx catalyst, with slight addition of Ce and Pd, showed excellent O-3 removal activity in the presence of water vapor. Various characterization methods were used to explore the relationship between activity and structure.