Comparison of the performance for oxidation of formaldehyde on nano-Co3O4, 2D-Co3O4, and 3D-Co3O4 catalysts

- Mesoporous Co3O4 and nano-Co3O4 were prepared by the hard template method and precipitation method.
- 3D-Co3O4 has the clear special pore structure, large surface area and surface active species.
- 3D-Co3O4 shows the best catalytic activity due to abundant surface oxygen species and active Co3+ species.
- 3D-Co3O4 has excellent reaction stability after continuously reacting for 160 h.