Nitrogen modified titanium dioxide (N-TiO2) promotes carbon monoxide oxidation over copper catalysts

Abstract

Copper supported on nitrogen modified titanium dioxide (Cu–N-TiO₂) was studied for the oxidation reaction of carbon monoxide. The interstitial nitrogen is identified as the dominant nitrogen species, which facilitates copper dispersion on the surface. Therefore, the reaction rate is improved comparatively to that of Cu–TiO₂. Cu⁺ is beneficial to the carbon monoxide oxidation reaction. Importantly, the value of ([Cu⁺]/[O]_sur) is positively proportional to the reaction rates.