The Catalytic Oxidation of Formaldehyde by FeOx-MnO2-CeO2 Catalyst: Effect of Iron Modification

A series of FeOx-MnO2-CeO2 catalysts were synthesized by the surfactant-templated coprecipitation method and applied for HCHO removal. The influence Fe/Mn/Ce molar ratio on catalytic performance was investigated, catalyst exhibited excellent activity, with complete conversion at low temperatures (40 °C) when 2/5/5. characterized N2 adsorption desorption, XRD, H2-TPR, O2-TPD XPS techniques to illustrate their structure–activity relationships. result revealed that introduction FeOx into MnO2-CeO2 formed a strong interaction between FeOx-MnO2-CeO2, which facilitated improved dispersion MnO2-CeO2, subsequently increasing surface area aiding pore development. This promotion effect Fe enhanced reducibility produced abundant surface-active oxygen. In addition, great number O? is beneficial intermediate decomposition, whereas existence Ce3+ favors formation oxygen vacancies catalyst, all contributed oxidation temperatures.