Pt-based catalysts have attracted widespread attention in environmental protection applications, especially in the catalytic destruction of light alkane pollutants. However, developing a satisfying platinum catalyst with high activity, excellent waterresistance, and practical suitability for hydrocarbon combustion at low temperature is challenging. In this study, the Pt catalyst supported on the selected Nb 2 O 5 oxide exhibited an efficient catalytic activity in propane oxidation and exceeded that of most catalysts reported in the literature. More importantly, the Pt/Nb 2 O 5 catalyst maintained excellent activity and durability even after high-temperature aging at 700 °C and under harsh working conditions, such as a certain degree of moisture, high space velocity, and composite pollutants. The excellent performance of the Pt/Nb 2 O 5 catalyst was attributed to the abundant metallic Pt species stabilized on the surface of Nb 2 O 5 , which prompted the C−H bond dissociation ability as the rate-determining step. Furthermore, propane was initially activated via oxidehydrogenation and followed the acrylate species path as a more efficient propane oxidation path on the Pt/Nb 2 O 5 surface. Overall, Pt/Nb 2 O 5 can be considered a promising catalyst for the catalytic oxidation of alkanes from industrial sources and could provide inspiration for designing superb catalysts for the oxidation of light alkanes.

Developing efficient catalysts for the total oxidation of propane at low temperatures is challenging; however, it is crucial for the purification of automotive exhaust and volatile organic compounds emitted in industrial processes. We report a highly stable and active Ru-based catalyst for propane oxidation by tuning Ru loading to achieve the balance between RuO x species in the CeO2 bulk and on the surface via a facile coprecipitation approach (Ru–CeO2). Compared to the Ru catalyst prepared through wet impregnation on a CeO2 support (Ru/CeO2), the prepared Ru–CeO2 catalyst allows for the formation of RuO x species with smaller particle sizes and lower oxidation states, as well as an increased number of oxygen vacancies on the catalyst surface, leading to a greater ability to adsorb and activate propane and oxygen. As a result, the Ru–CeO2 catalyst presents a substantially improved activity and durability toward propane oxidation, which can maintain 90% propane conversion at 220 °C for 50 h. This work highlights the synthetic tuning of the spatial distribution of Ru active sites within catalysts through a coprecipitation strategy for improved catalytic alkane oxidation, and the prepared Ru–CeO2 catalyst is a promising candidate material for industrial applications.