Abstract
Here, we successfully prepared Ba2Bi3Ta2O11Cl via a simple one-step molten salt method and adjusted its crystal morphology and structure, based on which the O2-evolving activity was significantly improved. In addition, W doping promotes the charge separation efficiency, lowers the energy barrier for water oxidation reaction, and thus improves the activity. Finally, the optimized W-doped sample after molten salt treatment shows the best O2 production activity (55 μmol h-1) without loading any cocatalyst, which is 6 times higher than that of pristine Ba2Bi3Ta2O11Cl and 2 times higher than that of the undoped Ba2Bi3Ta2O11Cl treated with molten salt, respectively.
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