Acta Phys. -Chim. Sin. ›› 2016, Vol. 32 ›› Issue (8): 2084-2092.doi: 10.3866/PKU.WHXB201605041

• ARTICLE • Previous Articles     Next Articles

Catalytic Combustion of n-Hexanal Using Cu-Mn Composite Oxide Supported on TiO2

Yue LI,Ting-Ting ZHANG,Juan WANG,Zhen ZHU,Bing JIA,Jiang YU*()   

  • Received:2016-02-18 Published:2016-07-29
  • Contact: Jiang YU E-mail:jyu0017@aliyun.com
  • Supported by:
    the National Natural Science Foundation of China(21207003);Beijing Science and Technology Plan of Action for Blue Sky Capital Projects, China(Z141100001014016)

Abstract:

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.

Key words: Copper loading capacity, Cu/Mn atomic ratio, CuxMny/TiO2, Active component, Catalytic oxidation, n-Hexanal

MSC2000: 

  • O643