Niobium Modification of Au/CeO2 for Enhanced Catalytic Performance over Benzene Combustion

• Published in: Nanomaterials (Basel, Switzerland) Vol. 11; no. 1; p. 189
• Main Authors: Liu, Zhe, Zhang, Xiaolan, Cai, Ting, Yuan, Jing, Zhao, Kunfeng, Lu, Wenquan, He, Dannong
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 01.01.2021; MDPI
• Subjects: Adsorption; Aqueous solutions; Au/Nb-CeO2; Benzene; Catalysts; catalytic combustion; Catalytic oxidation; Cerium oxides; Combustion; Dispersion; Fixed bed reactors; Hydrocarbons; Lasers; Niobium; niobium modification; Outdoor air quality; Particle size; Physicochemical properties; Redox properties; Sensors; Surface area; Temperature; Thermal decomposition; Thermal stability; VOCs; Volatile organic compounds; United States > US; Japan
• ISSN: 2079-4991; 2079-4991
• DOI: 10.3390/nano11010189

A novel Au/Nb-CeO2 was obtained by loading Au to Nb-modified CeO2 adopting a thermal decomposition method. The modification effect of Nb on the physicochemical properties and performance of Au/CeO2 for benzene combustion was systematically clarified. The incorporated Nb species are found to be present in the two forms of highly-dispersed state and bulk NbOx into CeO2 lattice in the obtained Au/Nb-CeO2 catalyst. They greatly enlarged the BET surface area, improved the redox property, and strengthened the Au–support interaction. The addition of Nb also promotes catalytic performance of Au/CeO2, especially high-temperature performance: T90% decreases by ca. 40 °C and Au/Nb-CeO2 exhibits superior stability to Au/CeO2 at 230 °C. The slightly improved Au dispersion and redox properties resulted in the small increase on initial activity of Au/Nb-CeO2, but the large BET surface area and the strong Au–support interaction greatly promoted the high-temperature performance improvement of Au/Nb-CeO2 for benzene combustion reaction.