Ceria doped CuMnOx as carbon monoxide oxidation catalysts: Synthesis and their characterization

Abstract

The CuMnOx and ceria doped CuMnOx catalysts (with ceria loadings in the range 0.5–3 wt.%) were synthesized by using the Co-precipitation method and characterized by various methods as discussed in the manuscript. Carbon monoxide (CO) is an individual one of the most toxic gases presents in the atmosphere and ambient-temperature complete oxidation of it is an important process for human health protection. According to the results, Ceria was doped successfully into the CuMnOx catalyst lattice. The better catalytic activity was observed 2.50 wt.% of ceria doping in the CuMnOx catalyst was found. The calcinations strategies (reactive calcinations and traditional calcinations) of the precursor have a huge impact on the activity of resulting catalysts. The presence of more number of oxygen vacancies and high specific surface area in ceria promoted CuMnOx catalyst to design highly active catalyst. The reusability of ceria doped CuMnOx catalyst was also tested and observed that this catalyst does not show any high level of major changes in its catalytic activity even after reuses.