Department of Chemical and Environmental Engineering, Escuela Técnica Superior de Ingenieros Industriales, Universidad Politécnica de Madrid, 28006, Madrid, Spain.
Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (ICPEES), CNRS/University of Strasbourg, 25 rue Becquerel, Strasbourg, France.
Top Curr Chem (Cham). 2023 May 9;381(4):15. doi: 10.1007/s41061-023-00423-y.
Hydrogen peroxide is a powerful and green oxidant that allows for the oxidation of a wide span of organic and inorganic substrates in liquid media under mild reaction conditions, and forms only molecular water and oxygen as end products. Hydrogen peroxide is therefore used in a wide range of applications, for which the well-documented and established anthraquinone autoxidation process is by far the dominating production method at the industrial scale. As this method is highly energy consuming and environmentally costly, the search for more sustainable synthesis methods is of high interest. To this end, the article reviews the basis and the recent development of the photocatalytic synthesis of hydrogen peroxide. Different oxygen reduction and water oxidation mechanisms are discussed, as well as several kinetic models, and the influence of the main key reaction parameters is itemized. A large range of photocatalytic materials is reviewed, with emphasis on titania-based photocatalysts and on high-prospect graphitic carbon nitride-based systems that take advantage of advanced bulk and surface synthetic approaches. Strategies for enhancing the performances of solar-driven photocatalysts are reported, and the search for new, alternative, photocatalytic materials is detailed. Finally, the promise of in situ photocatalytic synthesis of hydrogen peroxide for water treatment and organic synthesis is described, as well as its coupling with enzymes and the direct in situ synthesis of other technical peroxides.
过氧化氢是一种强大且环保的氧化剂，能够在温和的反应条件下将液体介质中的广泛范围的有机和无机底物氧化，仅形成分子水和氧气作为最终产物。因此，过氧化氢被广泛应用于各种领域，其中，有充分文献记录的蒽醌氧化法是目前工业规模上占主导地位的生产方法。由于该方法能耗高且对环境成本高，因此寻找更可持续的合成方法具有很高的意义。为此，本文综述了光催化合成过氧化氢的基础和最新进展。讨论了不同的氧还原和水氧化机制，以及几种动力学模型，并详细列出了主要关键反应参数的影响。综述了大量的光催化材料，重点介绍了基于二氧化钛的光催化剂和具有先进体相和表面合成方法的高前景石墨相氮化碳基系统。还报道了提高太阳能驱动光催化剂性能的策略，并详细介绍了寻找新的替代光催化材料的情况。最后，描述了在水处理和有机合成中就地光催化合成过氧化氢的前景，以及与酶的耦合和其他技术过氧化物的直接就地合成。
