A series of copper manganese oxides are synthesized using a simple redox method by controlling the molar ratio of Cu and Mn and calcination temperature. The optimum conditions are determined by investigating the effects of synthesis conditions on crystal phase, morphology and catalytic activity of catalysts. The relationship between structure and activity of catalyst is revealed by combining X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and other characterizations. The results show that more oxygen vacancy generated by the addition of copper may promote the oxygen species mobile, which leads to a lower reduction temperature and strong ability of oxidation reduction. The amorphous type of copper manganese oxide with poor crystallinity is also beneficial to the increase of oxygen vacancy, which facilitates the catalytic oxidation of formaldehyde. The catalyst with copper and manganese molar ratio of 1:2 and calcination temperature of 300℃ exhibites the best catalytic performance and can completely decompose formaldehyde at 90℃.

manganese oxide  /  copper manganese oxides  /  formaldehyde oxidation  /  redox properties