Abstract
Graphene oxide (GO)/Fe2O3 nanoplates supported Pt catalyst (Pt/GOFe) for room-temperature oxidation of formaldehyde (HCHO) was obtained via hydrothermal synthesis of Fe2O3 nanoplates, impregnation of GO and Pt precursor and NaBH4 reduction processes. Compared with TiO2 supported Pt (Pt/TiO2), Fe2O3 nanoplates supported Pt (Pt/Fe) and GO/commercial Fe2O3 supported Pt (Pt/GOFe-c), Pt/GOFe exhibited much higher catalytic activity toward room-temperature HCHO oxidation. The superior catalytic performance of Pt/GOFe is attributed to the unique morphology of Fe2O3 nanoplates, abundance of oxygen functionalities and the mobility of ππ bonds of GO, as well as plenty of active oxygen species resulted from the interaction between Pt and GO/Fe2O3. The in-situ DRIFTS results revealed that the surface hydroxyls played an important role in HCHO oxidation reaction, and formate/DOM species were the main intermediates. The excellent catalytic performance and recyclability make Pt/GOFe an efficient catalyst for HCHO oxidation at room temperature, which sheds a new light on rational design and fabrication of advanced catalyst for indoor air purification.
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