丙烯是重要的化工原料，现有技术难以满足市场需求。丙烷直接脱氢是热力学上受限反应，而选择性氧化脱氢是一条重要的替代技术。然而O2易使产物丙烯过度氧化，因此，如何控制O2氧化丙烷脱氢（O2-DHP）过程中过度氧化是实现该技术的关键。本项目拟采用固体氧化物电解池(SOEC)，将具有热催化活性的GaN作为阳极实现电热协同催化O2-DHP。采用SOEC技术将O2还原反应和C3H8氧化反应分别在阴极和阳极发生，通过调控阳极电导率，控制O2-的动力学行为，从而实现O2-在阳极GaN表面高选择性制丙烯；通过不同元素掺杂GaN，实现对其能隙的调控，揭示元素特性对GaN能隙的影响规律；明确GaN带隙与电热协同催化O2-DHP反应性能的关系；借助原位表征技术和理论计算结果相结合，提出GaN电热协同催化O2-DHP反应机理；可拓展SOEC应用领域，丰富电催化氧化理论，为O2-DHP提供一种新的研究思路和技术路线。

Propylene is an important chemical raw material, and the existing technology is difficult to meet the rapid growing market demand. Direct dehydrogenation of propane is a thermodynamically limited reaction and the selective oxidation dehydrogenation is an important alternative technique to the existing technology. However, it is found that the oxidant of O2 is easy to over oxidize alkene products. Therefore, how to control the excessive oxidation of propylene in the process of O2 oxidation propane dehydrogenation (O2-DHP) is the key question which must be faced. In this project, solid oxide electrolytic cell (SOEC) is proposed to be adopted, and GaN with thermal catalytic activity is used as the catalyst and anode for electrothermal synergistic catalysis of O2-DHP. By applying the technology of SOEC, O2 and C3H8 were isolated by the high temperature solid oxide electrolyte (Yttria Stabilized Zirconia, YSZ), and the kinetic behavior of O2- was controlled by adjusting the anode conductivity, so as to realize the highly selective synthesis of propylene by O2- in the anode of GaN. By doping GaN with B, P, Al and other elements, the band gap width can be regulated, and the influence effects of element components on the band gap width of GaN can be revealed. With the combination of in-situ characterization technologies and theoretical calculation results, the O2-DHP reaction mechanism of GaN electrothermal synergistic catalysis in SOEC system was proposed, so as to expand the application field of SOEC, enrich the theory of high-temperature electrocatalytic oxidation, and provide a new research idea and technical route for the selective oxidation dehydrogenation of propane to propylene.