Photocatalytic H₂O₂ evolution has received extensive attention as an environmentally friendly method, which is a dynamic process of formation and decomposition. At present, researches mainly focus on the H₂O₂ formation, while the decomposition of H₂O₂ is rarely studied. In addition, platinum as a cocatalyst plays an important role in enhancing the photocatalytic activity, but the effects of platinum valence state on the activity, especially towards H₂O₂ formation and decomposition, has not been studied in detail to the best of our knowledge. In this work, platinum with different valence state were deposited onto boron containing metal organic frameworks (UiO-67-B), and the roles of Pt(0), Pt(II) and Pt(IV) in the photocatalytic H₂O₂ process were explored in detail. Both the experimental results and theoretical calculations indicate that the presence of Pt(II) plays an important role not only in promoting the H₂O₂ formation but also in inhibiting the H₂O₂ decomposition.

光催化H ₂ O ₂释放作为一种环境友好的方法受到了广泛关注，它是一个形成和分解的动态过程。目前的研究主要集中在H ₂ O ₂的形成，而对H ₂ O ₂的分解研究很少。此外，铂作为助催化剂在提高光催化活性方面起着重要作用，但铂价态对活性的影响，尤其是对H ₂ O _2的活性形成和分解，据我们所知还没有被详细研究过。在这项工作中，将不同价态的铂沉积到含硼金属有机骨架（UiO-67-B）上，以及 Pt(0)、Pt(II) 和 Pt(IV) 在光催化 H ₂ O ₂中的作用过程进行了详细探讨。实验结果和理论计算均表明Pt(II)的存在不仅对促进H ₂ O ₂的形成而且对抑制H ₂ O ₂的分解起着重要作用。