Physical–chemical property and activity evaluation of LaB0.5Co0.5O3 (B = Cr, Mn, Cu) and LaMnxCo1−xO3 (x = 0.1, 0.25, 0.5) nano perovskites in VOC combustion

The correlation between physical–chemical properties and activities of LaB0.5Co0.5O3 (B = Cr, Mn, Cu) nano perovskites was studied in combustion of toluene. LaMn0.5Co0.5O3 showed the highest activity among LaB0.5Co0.5O3 catalysts and further optimization study was focused on LaMnxCo1−xO3 (x = 0.1, 0.25, 0.5). The activity and reducibility of catalysts improved due to partial substitution of Co3+ by B cation. No direct relationship was between surface area and catalyst activity. T50% of 2-propanol over LaMn0.25Co0.75O3, LaMn0.5Co0.5O3, LaMn0.1Co0.9O3 and LaCoO3 was 168, 200, 220 and 229 °C, respectively. LaMn0.25Co0.75O3 was the optimum catalyst and showed robust stability in combustion of toluene and 2-propanol.