摘要
采用柠檬酸络合法合成了一系列含铜复合氧化物 (超导体 ) .用化学滴定方法和O2 TPD等技术对所合成的复合氧化物的组成和表面性质进行了测定 .通过探讨催化剂结构与活性的关系 ,发现含铜复合氧化物中的非化学计量氧和铜离子的平均价态与苯酚羟化活性和过氧化氢分解活性密切相关 .在实验中观察到醌类化合物在苯酚羟化反应循环中具有增强电子传递功能 ,在此基础上提出了醌类化合物参与催化循环的机理 .
A series of superconductor-type cuprates synthesized by citric acid complex method exhibited high catalytic activity in direct hydroxylation of phenol to diphenols. The relationship between catalytic activity and structure of catalysts was. investigated by means of chemical analysis and O-2-TPD. It was found that the average valence of copper and the contents of nonstoichiometric oxygen could be the key factors to control the hydroxylation activity of phenol and the decomposition activity of H2O2. The mechanism involving the role of electron transfer of quinones was also proposed.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
2003年第4期547-550,共4页
Acta Chimica Sinica
基金
国家自然科学基金 (No.2 99730 4 1 )
