In‐situ UV‐irradiation activation leads to an intense visible‐light absorption of up to 700 nm in ethylene glycolate‐stabilized TiO2(B) nanosheets. It is ascribed that the creation of abundant subsurface/lattice oxygen vacancies and Ti3+ centers, along with UV‐induced breakdown of Ti−O bonds between ethylene glycolate and TiO2(B). Consequently, the enhanced and stable visible‐light‐driven photocatalytic H2 evolution is obtained on defect‐rich TiO2(B) nanosheets.

The presence of at least two different strontium tantalates with a type II junction structure for efficient photocatalytic overall water splitting.

The Cover Feature shows in‐situ UV‐irradiation activation for creating abundant subsurface/lattice oxygen vacancies and Ti3+ centers in ethylene glycolate‐stabilized TiO2(B) nanosheets. In their Communication, Ping Wang, Xianying Wang and co‐workers explain that along with UV‐induced breakdown of Ti‐O bonds between ethylene glycolate and TiO2(B) nanosheets, the obtained defect‐rich nanosheets exhibit an extended absorption band of up to 700 nm and greatly enhanced visible‐light photoactivity for H2 evolution. More information can be found in the Communication by Ping Wang, Zhouxiang Yi et al. on page 4252 in Issue 17, 2019 (DOI: 10.1002/cctc.201900713).