High‐Performance Ultrathin Co3O4 Nanosheet Supported PdO/CeO2 Catalysts for Methane Combustion

Abstract Efficient utilization of methane via catalytic complete combustion is a very important pathway to realize energy efficiency and pollution reduction. From the viewpoint of structural design, herein a green water‐phase route is developed to prepare ultrathin Co(OH) 2 nanosheet supported Pd catalysts. As a platform, the as‐obtained Pd/Co(OH) 2 nanosheets are able to be further used to load CeO 2 nanoparticles to form 2D nanostructured Pd/CeO 2 /Co(OH) 2 multicomponent hybrids, and further calcination can result in the final well‐crystallized ultrathin Co 3 O 4 nanosheet supported PdO/CeO 2 catalysts. Catalytic tests on methane combustion reveal that CeO 2 as a catalytic assistant greatly boosts the catalytic performance of PdO/Co 3 O 4 via strong synergetic effects with Pd species and Co 3 O 4 components. The best sample of PdO/CeO 2 ‐0.1/Co 3 O 4 exhibits surprisingly enhanced light‐off activity, indicating that such 2D Co 3 O 4 nanosheet supported nanocatalysts might show promising prospect for heterogeneous catalysis.