Artificial photosynthesis offers a promising strategy for converting solar energy into environmental-friendly H₂O₂. Herein, robust photocatalytic H₂O₂ production through dioxygen reduction is achieved, reaching a high H₂O₂ yield of 873 μmol L⁻¹ h⁻¹. The photocatalyst was prepared by in-situ chemical vapor deposition of N, S co-doped graphene on TiO₂ nanofibers. Thanks to the intimate interface with large area and Schottky junction, the H₂O₂ yield of the composite can be increased by eight times than that of pristine TiO₂. Experimental results and density functional theory calculations clarify that the strong synergistic effect between the doped N and S atoms provides abundant active sites to facilitate the electron transfer, promote the adsorption of O₂ molecules, and restrain the decomposition of formed H₂O₂ by suppressing H₂O₂ adsorption. This work not only provides a novel approach to build close contact between photocatalyst and co-catalyst, but also develops a highly efficient photocatalyst for H₂O₂ production.

人工光合作用为将太阳能转化为环境友好的 H ₂ O ₂提供了一种很有前景的策略。在此，通过分子氧还原实现了稳健的光催化H ₂ O ₂生产，达到873 μmol L ^-1 h ^-1的高H ₂ O ₂产率。该光催化剂通过在TiO ₂纳米纤维上原位化学气相沉积N、S共掺杂石墨烯制备。由于具有大面积的紧密界面和肖特基结，复合材料的 H ₂ O ₂产率可以比原始 TiO 提高 8 倍₂ . 实验结果和密度泛函理论计算表明，掺杂的N和S原子之间的强协同作用提供了丰富的活性位点，有利于电子转移，促进O ₂分子的吸附，并通过抑制形成的H ₂ O ₂的分解。 H ₂ O ₂吸附。这项工作不仅提供了一种在光催化剂和助催化剂之间建立紧密接触的新方法，而且还开发了一种用于生产H ₂ O ₂的高效光催化剂。