纳米Ce1—xMnxO2催化剂上乙醇催化氧化发光研究

研究了纳米Ce_1—xMn_xO₂上乙醇催化氧化发光特性, 重点考察了反应温度和催化剂组成(Ce/Mn比)对发光强度的影响规律. 为研究催化发光机理, 在相近的反应条件下考察了纳米Ce_1—xMn_xO₂上乙醇催化氧化反应的活性和选择性. 结果表明: 催化发光强度与催化反应中生成CH₃CHO的产率有很好的顺变关系, 表明CH₃CHO是导致C₂H₅OH分子在纳米Ce_1—xMn_xO₂催化剂上氧化发光的“活性分子”.

Cataluminescent Characteristics of Catalytic Ethanol Oxidation over Ce1-xMnxO2 Catalysts

This work reports the cataluminescent characteristics of nanosized Ce_1—xMn_xO₂ (0≤x≤1) samples in the catalytic oxidation of ethanol. It is shown that the intensity of cataluminescence was significantly affected by the reaction temperature and the composition or Ce/Mn ratio of Ce_1—xMn_xO₂. To elucidate mechanism of cataluminescence, the catalytic activity and product selectivity of ethanol oxidation was also studied over the Ce_1—xMn_xO₂ under conditions similar to the cataluminescence study. The results reveal that the intensity of cataluminescence was basically associated with the oxidative dehydrogenation of ethanol to form acetaldehyde. Therefore, the intermediate species of cataluminescence of ethanol oxidation could be elated with the formation of acetaldehyde at the catalyst surface.