In this work, we report a W single atoms modified g-C₃N₄ porous unltrathin nanosheets (W_SA-CN-PUNS) catalyst for photocatalytic H₂ evolution, which is synthesized by simply calcining the polyprrole-polyoxometalate/g-C₃N₄ composite in air. DFT calculation and experimental results reveal that the W_SA-CN-PUNS catalyst has a reduced band-gap, dopant-related defect levels and inhibited charge recombination. As a result, the W_SA-CN-PUNS shows an activity of 3.02 mmol h⁻¹ g⁻¹ toward H₂ production under visible light, which is 9.7 times higher than that of pristine g-C₃N₄. Meanwhile, for eliminating the waste of sacrifice agent, we demonstrate an alternative approach by coupling the photocatalytic H₂ evolution with benzyl alcohol oxidation, and the H₂/benzaldehyde production rates are 298.7/305.1 μmol h⁻¹ g⁻¹, respectively. This work not only provides a new strategy for designing high-efficiency single W atom dispersed hybrid catalyst, but also demonstrates the great potential of its practical applications in photocatalytic H₂ evolution.

在这项工作中，我们报告了一种W单原子修饰的gC ₃ N ₄多孔Unltrathin纳米片（W _SA -CN-PUNS）催化剂，用于光催化H _2的演化，该催化剂是通过简单地在以下条件下煅烧聚吡咯-多金属氧酸盐/ gC ₃ N ₄复合材料而合成的。空气。DFT计算和实验结果表明，W _SA -CN-PUNS催化剂具有降低的带隙，掺杂剂相关的缺陷水平和抑制的电荷重组。其结果是，在W _SA -CN-双关语表示的3.02毫摩尔h的活性^-1克^-1朝向ħ ₂在可见光下的产量是原始gC ₃ N _4的9.7倍。同时，为了消除牺牲剂的浪费，我们证明了通过将光催化的H ₂释放与苯甲醇氧化偶联的替代方法，并且H ₂ /苯甲醛的生产率分别为298.7 / 305.1μmolh ^-1 g ^-1。这项工作不仅为设计高效的单W原子分散杂化催化剂提供了新的策略，而且证明了其在光催化H ₂释放中的实际应用的巨大潜力。