Core-shell CoCuO x @MO x (MNb, Ti and Ce) catalysts with outstanding durability and resistance to H 2 O for the catalytic combustion of o-dichlorobenzene

Configuring Co-based catalysts with excellent activity, durability, anti-H O capability and superior chlorine resistance is an effective strategy for catalytic combustion of CVOCs. In this work, we elaborated a CoCuO catalysts with the same core but different shell. The CoCuO dodecahedron surface was successfully coated with shells of Nb O , TiO , and CeO using a range of conventional synthesis methods. The prepared core-shell catalysts (CoCuO @TiO and CoCuO @Nb O ) were found to generate plentiful acid sites and abundant lattice oxygen species, indicating a strong interaction between the core and shell layers that resulted in a significant enhancement of catalytic activity. Additionally, by-products generation was successfully controlled by acid sites and lattice oxygen species. More importantly, the core-shell structure design significantly improved the thermal stability and anti-H O capability of the catalysts. Furthermore, the possible formation pathways and reaction mechanisms were proposed based on in-situ FTIR and selectivity analysis.