Xuyu Wang

Mo- and V-based catalysts exhibit promising performance for low-temperature oxidative dehydrogenation of propane with oxygen (O2–ODHP), yet it remains difficult to achieve high propylene selectivity. The reaction requires efficient activation of C–H bonds while suppressing subsequent consecutive deep oxidation side reactions. In this work, highly dispersed V–Mo active sites were fabricated on γ-Al2O3 support by ball milling, forming highly dispersed Mo–V mixed-oxide-related domains associated with Mo4V6O25. The optimized 0.75 MVA catalyst achieved a propane conversion of 2.05% with a propylene selectivity of 90.04% at 160 °C. Multiple characterizations reveal that Mo doping modulates surface acidity and induces Mo–V electronic interaction. The tuned surface acidity promotes propane adsorption and C–H bond activation. Meanwhile, the modified surface oxygen environment together with weakened propylene adsorption effectively restrains the sequential oxidation of propylene into carbon oxides. Moreover, Mo incorporation enhances oxygen activation and replenishment, contributing to the regeneration of surface oxygen species under mild conditions. By synergistically regulating surface acidity, Mo–V electronic coupling and oxygen activation behavior, this study offers a practical strategy for designing low-temperature catalysts for propane oxidative dehydrogenation.

A rational design of WO _{3− x} /ZnFe ₂ O _{4− x} broken-gap heterojunction achieved higher charge carrier separation, light-harvesting ability, and good surface reaction, as an all-in-one photocatalyst for H ₂ generation.

Rational engineering of noble metal/transition metal bimetallic catalysts is considered as an effective way to constructing synergistic effect between adsorbed oxygen and hydroxyl for enhanced catalytic formaldehyde oxidation. Herein, we developed a Pt–Ni bimetallic catalysts loading on γ‐Al₂O₃ support for room‐temperature formaldehyde oxidation. Catalytic experiment results showed that the conversion rate was >97% with a >100 h stability. Several noble metals (Pd, Au, and Ag) were compared to identify the activity effect in formaldehyde oxidation. The activity and stability test in different atmospheres and in situ infrared test suggested that the PtNi/γ‐Al₂O₃ has the best activity and stability. At a meantime, the results also demonstrated that Pt sites motivate more surface adsorbed oxygen through activating ambient oxygen molecules, while the neighboring Ni atoms contribute to adsorbed hydroxyl, thereby offering sustainable activity. The high efficiency and stability of PtNi/γ‐Al₂O₃ catalysts for formaldehyde oxidation could be a promising candidate for air purification.