Modification of an oxyhalide solid-solution photocatalyst with an efficient O2-evolving cocatalyst and electron mediator for two-step photoexcitation overall water splitting

The decoration of high-crystallinity Bi 4 TaO 8 Cl 0.9 Br 0.1 solid solution with CoO x cocatalyst and reduced graphene oxide promoted O 2 generation and electron transfer, thus boosting active two-step excitation water splitting under visible light.