Photocatalytic methane combustion is a promising strategy to eliminate at ambient condition, but efficient photocatalysts are still lacking. Herein, we report that uniform anatase TiO2 nanocrystals predominantly enclosed with the {001} facets exhibit high activity in photocatalytic catalyzing RT flow-bed reactor. The reaction rate 17.6 mmolCH4·h–1·gcatalyst–1, which about 6 and 7 times of those...