Abstract: The LaCoO₃/CeO₂/cordierite, LaCoO₃/γ-Al₂O₃/cordierite, LaCoO₃/SiO₂/cordierite monolithic catalysts were synthesized by the suspension coating method and sol-gel method in two steps using cordierite honeycomb ceramic as the substrate and nano-oxides (CeO₂, γ-Al₂O₃, SiO₂) as the coating carrier. The phase, microscopic morphology, element composition, redox property, adhesion strength, and texture properties of the samples were characterized and analyzed by XRD, SEM, XPS, H₂-TPR, UT and N₂ adsorption-desorption techniques. The catalytic activity, high-temperature stability, shutdown/restart cycle stability, and water vapor stability of the monolithic catalyst were evaluated through the catalytic combustion performance of VOCs. Experimental results show that three catalysts exhibit good catalytic activity and stability, and the type of coating can cause a difference in catalytic performance. Among three cattalysts, the LaCoO₃/CeO₂/cordierite catalyst has the best performance. When the volume fraction of toluene is 0.1% and the space velocity is 18000 mL/(g·h), the tempereratures for the conversion rates of 50% and 90% are 158 and 214 ℃, respectively. The toluene conversion rate is only reduced by 7% after 72 h of stability testing (high temperature, stop/restart cycle, water vapor). Characterization results show that the CeO₂ nano-coating helps to form a catalytic layer with a porous and fluffy structure, which makes the catalyst have a higher ratio of adsorbed oxygen, strong low-temperature reducibility and good adhesion.