▎ 摘　　要

Aluminum-doped strontium titanate SrTiO3(Al), has been demonstrated as the suitable photocatalyst for overall water splitting. Noble metals, such as RhCrOx, are widely applied to accelerate the photocatalytic hydrogen evolution. Herein, Ni single atoms anchored on nitrogen-doped graphene (Ni SA-NG) are adopted to replace noble metal as hydrogen (H-2) evolution cocatalysts for SrTiO3(Al)/CoOx photocatalyst. The prepared Ni SA-NG/SrTiO3(Al)/CoOx photocatalyst exhibits remarkable activity for photocatalytic overall water splitting with the H-2 evolution rate of 498 mu mol g(-1) h(-1) and oxygen (O-2) evolution rate of 230 mu mol g(-1) h(-1), respectively. Ni SA-NG not only improves the efficiency of photogenerated charge transfer and separation through the Ti-O-C bonds acting as the electron transfer freeway, but also provides highly active sites to accelerate the surface H-2 evolution rate. This research provides a valuable method to construct SrTiO3-based photocatalyst without noble metal cocatalysts. (C) 2021 Elsevier Ltd. All rights reserved.