The generation of hydrogen peroxide (H₂O₂) from water and dioxygen by sunlight-driven heterogeneous photocatalysis is a promising method for the artificial photosynthesis of a liquid solar fuel. We previously found that resorcinol–formaldehyde (RF) resin powders prepared by high-temperature hydrothermal synthesis act as highly active semiconductor photocatalysts for H₂O₂ generation. Herein, we report that RF resin powders doped with poly(3-hexylthiophene-2,5-diyl) (RF/P3HT) exhibit enhanced photocatalytic activities. The highly dispersed P3HT within the resin particles created charge transfer complexes with the conduction band of the resin via electron donation, facilitating efficient transfer of the photogenerated conduction band electrons through P3HT. This enhanced charge separation promoted efficient water oxidation and O₂ reduction. The solar-to-chemical conversion efficiency for H₂O₂ generation on the RF/P3HT resin in water under simulated sunlight irradiation with atmospheric pressure of O₂ was ∼1.0%, which is the highest efficiency reported for powder catalysts in artificial photosynthesis.

中文翻译：

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用于太阳能到过氧化氢能量转换的聚噻吩掺杂的间苯二酚-甲醛树脂光催化剂

通过阳光驱动的多相光催化从水和分子氧中产生过氧化氢 (H ₂ O ₂ ) 是一种很有前途的液体太阳能燃料人工光合作用方法。我们之前发现，通过高温水热合成制备的间苯二酚-甲醛 (RF) 树脂粉末可作为 H ₂ O _{2 的}高活性半导体光催化剂一代。在此，我们报告了掺杂聚（3-己基噻吩-2,5-二基）（RF/P3HT）的 RF 树脂粉末表现出增强的光催化活性。树脂颗粒内高度分散的 P3HT 通过电子捐赠与树脂的导带产生电荷转移复合物，促进光生导带电子通过 P3HT 的有效转移。这种增强的电荷分离促进了有效的水氧化和 O ₂还原。在模拟阳光照射下，O ₂大气压下，RF/P3HT 树脂在水中生成H ₂ O ₂的太阳能到化学转化效率为~ 1.0%，这是人工光合作用中粉末催化剂的最高效率。