Mesoporous cobalt monoxide-supported platinum nanoparticles: Superior catalysts for the oxidative removal of benzene

Publication date: Available online 9 December 2019Source: Journal of Environmental SciencesAuthor(s): Jun Yang, Yutong Xue, Yuxi Liu, Jiguang Deng, Xiyun Jiang, Huan Chen, Hongxing DaiAbstractMesoporous Co3O4 (meso-Co3O4)-supported Pt (0.53 wt% Pt/meso-Co3O4) was synthesized via the KIT-6-templating and polyvinyl alcohol (PVA)-assisted reduction routes. Mesoporous CoO (meso-CoO) was fabricated through in situ reduction of meso-Co3O4 with glycerol, and the 0.18–0.69 wt% Pt/meso-CoO samples were generated by the PVA-assisted reduction method. Meso-Co3O4 and meso-CoO were of cubic crystal structure and the Pt nanoparticles (NPs) with a uniform size of ca. 2 nm were well distributed on the meso-Co3O4 or meso-CoO surface. The 0.56 wt% Pt/meso-CoO (0.56Pt/meso-CoO) sample performed the best in benzene combustion (T50% = 156 °C and T90% = 186 °C at a space velocity of 80,000 mL/(g h)). Introducing water vapor or CO2 with a certain concentration led to partial deactivation of 0.56Pt/meso-CoO and such a deactivation was reversible. We think that the superior catalytic activity of 0.56Pt/meso-CoO was intimately related to its good oxygen activation and benzene adsorption ability.Graphical abstract
Source: Journal of Environmental Sciences - Category: Environmental Health Source Type: research