复合催化剂降解甲醛等ain.pdf

JOURNAL OF RARE EAR THS, Vol. 27, No. 3, Jun. 2009, p. 418 A comparative study of formaldehyde and carbon monoxide complete oxidation on MnO -CeO catalysts x 2 1 1 2 2 1 LIU Xuesong (刘雪松) , LU Jiqing (鲁继青) , QIAN Kun (千 坤) , HUANG Weixin (黄伟新) , LUO Mengfei (罗孟飞) (1. Zhej iang Key Laboratory f or Reactive Chemistry on Solid Surf aces, Institute of Physical Chemistry, Zheji ang Normal University, Jinhua 321004, China; 2. National Laboratory f or Physical Sciences at the Microscale and Dep artment of Chemical Physics, University of Science and Technology of China, Hef ei 230026, China) Received 5 December 2008; revised 6 March 2009 Abstract: MnO -CeO composite catalysts were prepared by a coprecipitation method and tested for formaldehyde (HCHO) and carbon x 2 monoxide (CO) oxidation. X-ray photon spectroscopy (XPS) results indicated that the average oxidation state of surface Mn species in CeMn composite catalyst was higher compared to the pure MnO . The enhancement of reactivity for HCHO oxidation was due to the activation of x the lattice oxygen species in MnO by the addition of CeO , which was confirmed by the H temperature programmed reduction (H -TPR) x 2 2 2 results. The remarkable enhancement of reactivity for CO oxidation by the addition of