Effect of loading content of copper oxides on performance of Mn-Cu mixed oxide catalysts for catalytic combustion of benzene

A series of Mn-Cu mixed oxide catalysts were prepared by precipitation method. The catalysts were characterized by N2 adsorp- tion-desorption, H2-TPR and XPS. When the loading ratio of manganese oxides to copper oxides was 8：2 or 7：3, the catalysts possessed better catalytic activity, and benzene wa...

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Bibliographic Details
Published inJournal of rare earths Vol. 30; no. 9; pp. 871 - 877
Main Authors CAO, Hongyan, LI, Xiaoshuang, CHEN, Yaoqiang, GONG, Maochu, WANG, Jianli
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.09.2012
Subjects
Benzene
Catalysis
CATALYSTS
catalytic combustion
COMBUSTION
COPPER OXIDE
Copper oxides
Manganese
Manganese oxides
Mn-Cu mixed oxide catalysts
OXIDES
Rare earth metals
rare earths
X RAY SPECTROSCOPY
X-ray photoelectron spectroscopy
催化剂性能
催化燃烧
加载
复合氧化物催化剂
氧化铜催化剂
铜复合氧化物
铜氧化物
锰铜
catalytic combustion
Mn-Cu mixed oxide catalysts
benzene
rare earths
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Summary:A series of Mn-Cu mixed oxide catalysts were prepared by precipitation method. The catalysts were characterized by N2 adsorp- tion-desorption, H2-TPR and XPS. When the loading ratio of manganese oxides to copper oxides was 8：2 or 7：3, the catalysts possessed better catalytic activity, and benzene was converted completely at 558 K. Results of H2-TPR showed that the loading of a small amount of copper oxides decreased the reduction temperature of catalysts. Results of XPS showed that the loading of a small amount of copper oxides increased the proportion of manganese and defective oxygen on the surface of catalysts, and stabilized manganese at higher oxidation state. And the catalyst with the loading ratio 7：3 was a little worse than 8：2, since the interaction between manganese oxides and copper oxides is too strong, copper oxides migrate to the surface of catalysts and manganese oxides in excess are immerged.
Bibliography:Mn-Cu mixed oxide catalysts; catalytic combustion; benzene; rare earths
A series of Mn-Cu mixed oxide catalysts were prepared by precipitation method. The catalysts were characterized by N2 adsorp- tion-desorption, H2-TPR and XPS. When the loading ratio of manganese oxides to copper oxides was 8：2 or 7：3, the catalysts possessed better catalytic activity, and benzene was converted completely at 558 K. Results of H2-TPR showed that the loading of a small amount of copper oxides decreased the reduction temperature of catalysts. Results of XPS showed that the loading of a small amount of copper oxides increased the proportion of manganese and defective oxygen on the surface of catalysts, and stabilized manganese at higher oxidation state. And the catalyst with the loading ratio 7：3 was a little worse than 8：2, since the interaction between manganese oxides and copper oxides is too strong, copper oxides migrate to the surface of catalysts and manganese oxides in excess are immerged.
11-2788/TF
ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:1002-0721
2509-4963
DOI:10.1016/S1002-0721(12)60148-3