Synthesis and characterization of AgCoO2 catalyst for oxidation of CO at a low temperature

Abstract

In this research work, we have discussed about the effect of catalyst preparation and their calcination strategy on the characterization property and activity of the final catalyst. The AgCoO2 catalyst was prepared by the co-precipitation method gave the highest activities for the preferred reactions. The recent study was carried out in the laboratory shows that the calcination strategies of the AgCoO2 precursor highly affect on the activity of resulting catalysts for CO oxidation. The AgCoO2 catalyst obtained by calcination of the precursors in the presence of chemically reactive (CO + air) mixture exhibits the best catalytic activity as compared to the traditional method of calcination. The reactive calcination of the AgCoO2 catalyst produces partially reduced phase of the catalyst causing the highest activity in the reaction. The remarkable activity of the novel catalyst over conventional ones (obtained by calcination of the precursors in reactive calcination) in CO oxidation was associated with the presence of AgCoO2 and its unusual morphology as evidenced by XRD, SEM-EDX, TEM, XPS and FTIR characterization. Further, the activity order of the AgCoO2 catalysts obtained by different calcination conditions was as follows: RC > flowing-air > stagnant-air. © 2018 Elsevier Ltd