论文部分内容阅读
通过分子束与表面散射实验确定甲烷在La2O3清洁表面是平动能激活吸附,阈值平动能53.48kJ/mol.氧在La2O3清洁表面的吸附服从Arrhenius方程关系,其脱附峰在960K。甲烷只在吸咐氧的La2O3表面发生催化氧化反应,催化剂样品温度在800K以后反应产物CO2出现,但其关键因素还是CH4分子的平动能。在阈值平动能以下,样品温度超过850K也无反应产物出现。
By molecular beam and surface scattering experiments, methane was determined on the clean surface of La2O3 by kinetic energy activation and the threshold kinetic energy was 53.48kJ / mol. The adsorption of oxygen on the clean surface of La2O3 obeys Arrhenius equation and the desorption peak is at 960K. Methane only catalyzed the oxidation of oxygen on the surface of La2O3. After the catalyst sample temperature was 800K, the reaction product CO2 appeared, but the key factor was the translational energy of CH4. Below the threshold translational energy, the sample temperature exceeds 850 K and no reaction products appear.