Influence of silver on the catalytic properties of the cryptomelane and Ag-hollandite types manganese oxides OMS-2 in the low-temperature CO oxidation

- OMS-2 and Ag-OMS-2 were synthesized by microwave-reflux and hydrothermal methods.
- Ag doping of OMS-2s was performed by UV irradiation and KBH4 reduction methods.
- Silver doping enhanced CO oxidation activity of OMS-2.
- Oxygen vacancies are beneficial to achieve interaction between silver and OMS-2.
- The CO oxidation mechanism was proposed for silver doped OMS-2 catalysts.