Synergetic effect in bimetallic Au-Ag/TiO2 catalysts for CO oxidation: New insights from in situ characterization

- Better understanding of the chemical phenomena occurring during Au-Ag/TiO2 preparation.
- The highest activity and stability for bimetallic Au-Ag/TiO2 activated under H2 at 550 °C.
- Increasing proportion of silver in the bimetallic particles surface during activation under H2.
- Bimetallic particles gradually form as the reduction temperature increases.
- Optimum T of activation because a competition between positive and negative effects.