Enhancement of toluene oxidation performance over LaCoO perovskite by lanthanum non-stoichiometry.

LaCoO catalysts with different non-stoichiometry of lanthanum ions were synthesized by using the sol-gel method, and their catalytic performance in toluene combustion was investigated. The results showed that the catalytic activity and stability of A-site nonstoichiometric LaCoO were improved to a certain extent compared with pure LaCoO perovskite. Among them, the LaCoO catalyst gave the best catalytic performance for toluene oxidation.