A silver-manganese dual co-catalyst for selective reduction of carbon dioxide into carbon monoxide over a potassium hexatitanate photocatalyst with water.

A Ag-Mn dual co-catalyst deposited on a K2Ti6O13 photocatalyst significantly enhances the photocatalytic CO2 reduction into CO with an extremely high selectivity of 98% by using H2O as an electron donor, owing to the properties of Ag and MnOx species for promoting CO and O2 formation, respectively.