GaN/Q-x catalysts (Q-x: SiO₂ support with varying pore size) were successfully prepared through an initial wetness impregnation of gallium nitrate hydrate and melamine, and subsequent a facile solid-phase reaction. The as-synthesized GaN nanoparticles could be well dispersed upon being loaded on Q-x support. It is found that GaN is an active phase for the dehydrogenation of propane to propene in CO₂ atmosphere, wherein CO₂ acts as a soft oxidant for not only promoting the activity and selectivity but also closely influencing the deposited carbon formation. In addition, the GaN/Q-3 catalyst with 5 wt % of GaN displays a propane conversion of 31 % with a selectivity of 93 % for propene at 600 °C in CO₂ atmosphere, which is obviously superior to bulk GaN under the same reaction conditions. This is due to the synergetic interaction of small particle size and well dispersion of GaN and efficient CO₂ adsorption in narrow-pore-rich Q-3 support. So, this finding not only extends the catalytic system of CO₂ oxidation dehydrogenation of propane to propene, but also promotes its progress towards potential industrial exploitation.

GaN / Qx催化剂（Qx：具有可变孔径的SiO ₂载体）是通过首先对硝酸镓水合物和三聚氰胺进行初次湿润浸渍，然后进行轻松的固相反应而成功制备的。合成后的GaN纳米颗粒在加载到Qx载体上后可以很好地分散。发现GaN是在CO ₂气氛中丙烷脱氢成丙烯的活性相，其中CO ₂充当软氧化剂，不仅促进活性和选择性，而且密切影响沉积的碳的形成。另外，具有5％GaN的GaN / Q-3催化剂在600°C的CO _2中对丙烷的转化率达31％，对丙烯的选择性为93％。在相同的反应条件下，明显优于块状GaN。这是由于小粒径和GaN的良好分散以及在富窄孔Q-3载体中有效的CO ₂吸附的协同相互作用。因此，该发现不仅将丙烷的CO ₂氧化脱氢催化体系扩展为丙烯，而且促进了其向潜在的工业开发的进展。