Metal-organic framework derived porous Co3O4 with controllable interior structure for highly efficient CO oxidation

Abstract Tailoring interior structure of porous nanomaterials is of great important for efficient CO oxidation. Here, porous Co3O4 with complex interior structure (hollow structure and yolk-shell structure) derived from metal-organic frameworks are successfully developed via an efficient and controllable calcination method. Compared with yolk-shell Co3O4 catalysts, the hollow Co3O4 exhibited excellent catalytic performance with onset at temperature of 60 °C and completed CO conversion at 140 °C. The fabricated hollow Co3O4 catalysts could obtain completely conversion of CO under 140 °C for 20 h, suggesting remarkable cycling stability. The enhanced catalytic activity and cycling stability are ascribed to the special properties of porous Co3O4 catalysts. Our work offers a facile approach to facilitate the development of catalysts with controllable interiors and extend their practical applicability.