A facile strategy to prepare single-atom catalysts anchored on TiO2 with multiple oxygen vacancies for photocatalytic hydrogen evolution

IF 6.5 1区化学 Q2 CHEMISTRY, PHYSICAL Journal of Catalysis Pub Date : 2025-03-27 DOI:10.1016/j.jcat.2025.116105

Cailing Wu , Mingming Sun , Xinyang Gao , Qifei Huang , Zhaojun Min , Yanxing Zhang , Jianji Wang

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Abstract

Single atom catalysts (SACs) supported on metal oxide are usually prepared at high temperature, high pressure, and complex process. Herein, a new strategy is developed to prepare SACs anchored on vacancy-rich TiO₂ using Ti₂O₃ as the support precursor under mild conditions, where Ti³⁺ on Ti₂O₃ surface acts as “traps” to capture and then reduce metal ions through electron transfer without using reducing agents. This approach is universally applicable for different single metal atoms supported on diverse phases of TiO₂ (anatase, rutile, metastable and mixed counterpart). The as-obtained Pt₁/TiO₂ with controllable Pt loading and multiple oxygen vacancies (Ov) exhibits excellent activity in photocatalytic H₂ evolution. At optimal conditions, the H₂ evolution rate is up to 95,180 μmol g⁻¹ h⁻¹, which is the highest for TiO₂ supported SACs reported.

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一种简单的方法制备锚定在具有多个氧空位的TiO2上的单原子催化剂，用于光催化析氢

金属氧化物负载单原子催化剂的制备通常需要高温、高压和复杂的工艺。本文提出了一种新的策略，在温和的条件下，以Ti2O3作为支撑前驱体，在富含空位的TiO2上制备SACs，其中Ti2O3表面的Ti3+作为“陷阱”，通过电子转移捕获金属离子，然后在不使用还原剂的情况下通过电子转移还原金属离子。该方法普遍适用于不同相TiO2（锐钛矿、金红石、亚稳和混合对应物）上负载的不同单金属原子。得到的Pt1/TiO2具有可控的Pt负载和多个氧空位（Ov），在光催化析氢中表现出优异的活性。在最佳条件下，H2的析出速率可达95,180 μmol g−1 h−1，是目前所报道的TiO2负载sac中最高的。

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来源期刊

Journal of Catalysis 工程技术-工程：化工

CiteScore

12.30

自引率

5.50%

发文量

447

审稿时长

31 days

期刊介绍： The Journal of Catalysis publishes scholarly articles on both heterogeneous and homogeneous catalysis, covering a wide range of chemical transformations. These include various types of catalysis, such as those mediated by photons, plasmons, and electrons. The focus of the studies is to understand the relationship between catalytic function and the underlying chemical properties of surfaces and metal complexes. The articles in the journal offer innovative concepts and explore the synthesis and kinetics of inorganic solids and homogeneous complexes. Furthermore, they discuss spectroscopic techniques for characterizing catalysts, investigate the interaction of probes and reacting species with catalysts, and employ theoretical methods. The research presented in the journal should have direct relevance to the field of catalytic processes, addressing either fundamental aspects or applications of catalysis.