光催化
分解水
钛酸锶
材料科学
贵金属
催化作用
石墨烯
光催化分解水
析氧
无机化学
金属
光化学
纳米技术
物理化学
化学
薄膜
电化学
生物化学
电极
冶金
作者
Yuxiang Liu,Xuejun Xu,Sufan Zheng,Shangchun Lv,Hewen Li,Zhichun Si,Xiaodong Wu,Rui Ran,Duan Weng,Feiyu Kang
出处
期刊:Carbon
[Elsevier]
日期:2021-10-01
卷期号:183: 763-773
被引量:22
标识
DOI:10.1016/j.carbon.2021.07.064
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 (H2) 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 H2 evolution rate of 498 μmol g−1 h−1 and oxygen (O2) evolution rate of 230 μmol 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 H2 evolution rate. This research provides a valuable method to construct SrTiO3-based photocatalyst without noble metal cocatalysts.
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