摘要
研究了纳米Ce1—xMnxO2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Ce1—xMnxO2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Ce1—xMnxO2催化剂上氧化发光的“活性分子”.
This work reports the cataluminescent characteristics of nanosized Ce1-xMnxO2 （0≤x≤1） sampies 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 Ce1-xMnxO2. To elucidate mechanism of cataluminescence, the catalytic activity and product selectivity of ethanol oxidation was also studied over the Ce1-xMnxO2 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.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
2006年第8期751-755,共5页
Acta Chimica Sinica
基金
国家自然科学基金(Nos.20125310
20573062
20590362)资助项目.
关键词
纳米Ce1-xMnxO2
乙醇氧化
催化发光
乙醛
氧化脱氢
nanosized Ce1-xMnxO2
cataluminescence
catalytic oxidation of ethanol
acetaldehyde
oxidative dehydrogenation
