催化学报 ›› 2026, Vol. 91: 252-262.DOI: 10.1016/S1872-2067(26)65206-0

• 论文 • 上一篇    下一篇

空间相邻氧化还原位点与自旋极化在ZnIn2S4中的协同作用促进H2O2光合成

李志奇a, 关晨a, 许凯强b,*(), 夏伟c, Dilshod D. Nematovd, 向全军a,*()   

  1. a 电子科技大学电子薄膜与集成器件国家重点实验室, 四川成都 611731, 中国
    b 上海应用技术大学化学与环境工程学院, 上海 201418, 中国
    c 茅台学院资源与环境系, 贵州仁怀 564507, 中国
    d 塔吉克斯坦国家科学院物理技术研究所, 杜尚别, 塔吉克斯坦
  • 收稿日期:2026-01-12 接受日期:2026-01-30 出版日期:2026-12-18 发布日期:2026-10-13
  • 通讯作者: *电子信箱: xiangqj@uestc.edu.cn (向全军),
    xukaiqiang24@sit.edu.cn (许凯强).
  • 基金资助:
    国家自然科学基金(22479020);国家自然科学基金(W2512051);国家自然科学基金(22272019);四川省科技计划(2026NSFSC0079);重庆市科学技术局(CSTB2022NSCQ-MSX0246)

Synergy of spatially adjacent redox sites and spin polarization in ZnIn2S4 for boosted H2O2 photosynthesis

Zhiqi Lia, Chen Guana, Kaiqiang Xub,*(), Wei Xiac, Dilshod D. Nematovd, Quanjun Xianga,*()   

  1. a State Key Laboratory of Electronic Thin Film and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 611731, Sichuan, China
    b School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, China
    c Department of Resources and Environment, Moutai Institute, Renhuai 564507, Guizhou, China
    d S. U. Umarov Physical-Technical Institute of NAST, 734042 Dushanbe, Tajikistan
  • Received:2026-01-12 Accepted:2026-01-30 Online:2026-12-18 Published:2026-10-13
  • About author:First author contact:

    Zhiqi Li conceived the idea, designed the experiments, and wrote the original draft. Chen Guan has completed the tasks of writing, reviewing, and editing. Wei Xia reviewed the manuscript. Kaiqiang Xu and Dilshod D. Nematov reviewed and revised the manuscript. Quanjun Xiang supervised the work, reviewed and revised the manuscript.

  • Supported by:
    National Natural Science Foundation of China(22479020);National Natural Science Foundation of China(W2512051);National Natural Science Foundation of China(22272019);Sichuan Science and Technology Program(2026NSFSC0079);Chongqing Science and Technology Bureau(CSTB2022NSCQ-MSX0246)

摘要:

过氧化氢(H2O2)是一种多功能化学品, 广泛应用于消毒、化工及环境修复领域. 近年来, 通过光催化将H2O和O2转化为H2O2的反应被视为替代传统方法的环保策略. 此前, 大量研究致力于探讨光催化剂表面光诱导电子向O2的转移机制. 然而, 过氧化氢光催化研究的最新进展日益凸显质子耦合电子转移(PCET)在提升催化效率中的关键作用. PCET对于驱动两电子氧还原路径生成H2O2至关重要. 然而, 在光催化H2O2生产过程中, 如何耦合相邻的水氧化反应与氧还原反应位点以放大PCET效应, 仍是一个巨大挑战.
解决这一挑战需要克服空间相邻氧化还原位点难以避免的载流子复合问题. 本文成功将钴和硫空位引入ZnIn2S4光催化剂中. 其中, 钴的引入诱导了自旋极化, 显著抑制了电荷载流子的复合; 而硫空位则在金属位点创造了不饱和配位环境, 促进了反应物的吸附, 从而形成了空间相邻的氧化还原位点. 我们提出一种策略, 通过同时掺入钴掺杂剂和硫空位, 在ZnIn2S4中实现自旋极化与空间相邻氧化还原位点的耦合. 硫空位的引入导致不饱和位点的生成, 钴位点通过积累电子活化O2发生氧还原反应, 而相邻的硫空位捕获光生空穴驱动水氧化反应. 钴位点与硫空位在空间上的邻近排列, 在动力学层面实现了高效质子转移, 从而促进PCET过程. 此外, 钴掺杂诱导的显著电子自旋极化有效抑制了载流子复合. 扩展X-射线吸收精细结构与密度泛函理论模拟结果揭示了Co-Vs双位点的形成. 原位傅里叶变换红外光谱和拉曼光谱证实了PCET过程得到促进. 最终, 该催化剂实现了215.4 μmol g-1 h-1的H2O2产率, 相较于纯ZnIn2S4 (59.6 μmol g-1 h-1)提高了3.6倍.
综上, 本工作提出一种协同调控空间相邻氧化还原位点与电子自旋极化的策略, 通过这种协同展示了质子转移与载流子分离的双促进作用, 阐明了反应机制, 为实现高效光催化合成H2O2提供了有效途径, 为后续相关反应的开发和应用提供参考.

关键词: 自旋极化, 质子耦合电子转移, 空间相邻的氧化还原位点, ZnIn2S4, 光催化H2O2生成

Abstract:

Proton-coupled electron transfer (PCET) is essential for driving the two-electron oxygen reduction pathway toward H2O2 production. However, the coupled integration of the adjacent water oxidation reaction and oxygen reduction reaction sites to amplify PCET presents a considerable challenge in the photocatalytic H2O2 production. Addressing this challenge requires overcoming the inevitable carrier recombination problem at spatially adjacent redox sites. In this work, we incorporated Co and sulfur vacancies into ZnIn2S4 as a photocatalyst, in which the incorporation of Co induced spin polarization, significantly inhibiting the recombination of charge carriers. While the sulfur vacancies created an unsaturated coordination environment at the metal sites to promote the adsorption of reactants, forming the spatially adjacent redox sites. Extended X-ray absorption fine structure results and density functional theory simulations revealed the formation of Co-Vs dual sites. In-situ Fourier transform infrared and Raman spectroscopy confirmed the promoted PCET. This resulted in a 3.6-fold increase (215.4 μmol g-1 h-1) in H2O2 yield compared to pure ZIS (59.6 μmol g-1 h-1). This work exhibited a strategy for constructing spatially synergistic sites and manipulating the electronic spin polarization, providing an effective approach to enhance photocatalytic H2O2 production.

Key words: Spin polarization, Proton-coupled electron transfer, Spatially adjacent redox sites, ZnIn2S4, Photocatalytic H2O2 production