纳米Ce1—xMnxO2催化剂上乙醇催化氧化发光研究.pdf

2006 年第 64 卷化学学报 Vol. 64, 2006 第 8 期, 751 ~755 ACTA CHIMICA SINICA No. 8, 751 ~755 * E-mail: ******@. Received July 20, 2005; revised November 11, 2005; accepted December 9, 2005. 国家自然科学基金(Nos. 20125310, 20573062, 20590362) 资助项目. ·研究论文· 纳米 Ce 1 — x Mn x O 2 催化剂上乙醇催化氧化发光研究叶青高岐张新荣徐柏庆* ( 清华大学化学系有机光电子与分子工程教育部重点实验室分子催化与定向转化研究室北京 100084) 摘要研究了纳米 Ce 1 x Mn x O 2 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 x Mn x O 2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 CH 3 CHO 的产率有很好的顺变关系, 表明 CH 3 CHO 是导致 C 2 H 5 OH 分子在纳米 Ce 1 x Mn x O 2 催化剂上氧化发光的“活性分子”. 关键词纳米 Ce 1 x Mn x O 2 ; 乙醇氧化; 催化发光; 乙醛; 氧化脱氢 Cataluminescent Characteristics of Catalytic Ethanol Oxidation over Ce 1 — x Mn x O 2 Catalysts YE, Qing GAO, Qi ZHANG, Xin-Rong XU, Bo-Qing * (Innovative Catalysis Program , Key Laboratory anic Optoelect ronics & Molecular Engineering , Department of Chemistry , Tsinghua University , Beijing 100084 ) Abstract This work reports the cataluminescent characteristics of nanosized Ce 1 — x Mn x O 2 (0 ≤ x ≤1) sam- ples in the catalytic oxidation of ethanol. It is shown that the intensity of cataluminescence was significantly affected by the reaction temperature an d position or Ce/Mn ratio of Ce 1 — x Mn x O 2. To elucidate mechanism of cataluminescence, the catalytic activity and product selectivity of ethanol oxidat