过氧化氢生产与利用的新进展

过氧化氢既可用作环境友好的绿色氧化剂,也可用作燃料电池中的太阳能燃料,因而受到越来越多的关注.本文综述了太阳能驱动分子氧氧化水制备过氧化氢及其作为绿色氧化剂和燃料的研究进展.利用太阳能将水的e^-和4e^-氧化与分子氧的e^-还原相结合,使光催化生产过氧化氢成为可能;本文讨论了与e^-和4e^-水氧化选择性及e^-和4e^-氧还原选择性相关的催化反应控制.由于光催化e^-氧化水和e^-还原分子氧的过程都产生过氧化氢,因此该组合的催化效率较高.太阳能光驱动水氧化及分子氧还原生产过氧化氢与过氧化氢催化氧化底物相结合,在该过程中分子氧用作最环保的氧化剂.

Recent progress in production and usage of hydrogen peroxide

Hydrogen peroxide has attracted increasing interest as an environmentally benign and green oxi-dant that can also be used as a solar fuel in fuel cells. This review focuses on recent progress in pro-duction of hydrogen peroxide by solar-light-driven oxidation of water by dioxygen and its usage as a green oxidant and fuel. The photocatalytic production of hydrogen peroxide is made possible by combining the 2e– and 4e– oxidation of water with the 2e– reduction of dioxygen using solar energy. The catalytic control of the selectivity of the 2e– vs. 4e– oxidation of water is discussed together with the selectivity of the 2e– vs. 4e– reduction of dioxygen. The combination of the photocatalytic 2e–oxidation of water and the 2e– reduction of dioxygen provides the best efficiency because both pro-cesses afford hydrogen peroxide. The solar-light-driven hydrogen peroxide production by oxidation of water and by reduction of dioxygen is combined with the catalytic oxidation of substrates with hydrogen peroxides, in which dioxygen is used as the greenest oxidant.