%0 Journal Article
%T <br>
%A 余江
%A 张婷婷
%A 朱圳
%A 李悦
%A 王娟
%A 贾冰
%J 物理化学学报
%D 2016
%R 10.3866/PKU.WHXB201605041
%X 通过调控Cu负载量及Cu/Mn原子比，探究其对TiO2负载Cu-Mn复合氧化物(CuxMny/TiO2)催化材料中活性组分间相互作用的影响，结果表明，铜负载量为15% (w，质量分数)和Cu/Mn原子比为1 : 1时有利于类铜锰尖晶石相Cu1.5Mn1.5O4的形成，随着Cu负载量的增加促使氧物种从晶格氧向表面吸附氧转移。复合催化材料中铜负载量的变化及Cu/Mn原子比对活性组分和催化活性间的相互作用影响显著。结果发现Cu15Mn15/TiO2在225 ℃时使正己醛转化率达到90% (T90)，材料良好的性能归因于其具有较高的Cu2+与Oads含量，并可与Mn2+实现双还原氧化过程。结果表明，Cu15Mn15/TiO2复合材料中的类铜锰尖晶石活性组分可完成redox循环，以保持催化材料较高的稳定性。<br>In this study, we regulated copper loading and the atomic ratio of Cu/Mn and investigated the influence on interaction of the active species of Cu-Mn composite oxide catalyst supported on TiO2 (CuxMny/ TiO2). The results indicate that 15% (w, mass fraction) copper loading and a 1 : 1 atomic ratio of Cu/Mn favors formation of analogous Cu-Mn spinel (Cu1.5Mn1.5O4). With increasing loading of copper, oxygen transfers from the lattice oxygen species to defect oxygen. The changes in copper loading and the Cu/Mn atomic ratio have a large influence on the interaction between the active components and the catalytic activity. We found that 90% n-hexanal can be degraded by Cu15Mn15/TiO2 at 225 ℃ (T90). The excellent performance of Cu15Mn15/TiO2 is attributed to the higher contents of Cu2+ and Oads, which can achieve a dual redox process with Mn2+ in Cu15Mn15/TiO2. The analogous Cu-Mn spinel active ingredient can maintain high catalytic stability by redox cycles
%U http://www.whxb.pku.edu.cn/CN/Y2016/V32/I8/2084