Center for General Education, Chang Gung University, Kwei-Shan Tao-Yuan, Taiwan, Republic of China.
Langmuir. 2012 Jul 3;28(26):9996-10006. doi: 10.1021/la301684h. Epub 2012 Jun 22.
In this paper, we have shown that Cu/TiO(2) catalysts are highly active in CO oxidation. For instance, a 3.4% Cu/TiO(2) catalyst exhibits a higher turnover rate for the effective removal of CO in air than 3-5% Pt/TiO(2) and 20% Cu/ZnO/Al(2)O(3) catalysts. A small amount of Cu(+) species is formed during the calcination treatment at 225 °C, which is the main active phase for the CO oxidation. However, it is proposed that some highly dispersed CuO can also form in the TiO(2) lattice during the calcination treatment. Furthermore, a strong electron interaction between Cu(2+) in highly dispersed CuO and Ti(3+) on rutile TiO(2) (Cu(2+)+Ti(3+)→Cu(+)+Ti(4+)) has been shown to occur. Overall, the reduction of Cu(+) is a major factor that contributes to the reaction rate of the CO oxidation.
在本文中，我们已经证明 Cu/TiO(2) 催化剂在 CO 氧化中具有很高的活性。例如，在空气中有效去除 CO 方面，3.4%Cu/TiO(2)催化剂的转化率比 3-5%Pt/TiO(2)和 20%Cu/ZnO/Al(2)O(3)催化剂更高。在 225°C 的煅烧处理过程中会形成少量的 Cu(+)物种，这是 CO 氧化的主要活性相。然而，据推测，在煅烧处理过程中，一些高度分散的 CuO 也可以在 TiO(2)晶格中形成。此外，在高度分散的 CuO 中的 Cu(2+)和锐钛矿 TiO(2)上的 Ti(3+)之间存在强烈的电子相互作用（Cu(2+)+Ti(3+)→Cu(+)+Ti(4+)）。总的来说，Cu(+)的还原是导致 CO 氧化反应速率的主要因素。
