Templated 2D Polymer Heterojunctions for Improved Photocatalytic Hydrogen Production

• DOI: 10.1002/adma.202300037
• Publication Date: 2023-05-11T06:16:52Z
• Authors: Catherine M. Aitc...; Soranyel Gonzalez...; Shilin Yao; Max Benkert; Zhiyuan Ding; Neil P. Young; Benjamin Willner; Floriana Moruzzi; Yuanbao Lin; Junfu Tian; Peter D. Nellist; James R. Durrant; Iain McCulloch
• Keywords: Acceptor; Knoevenagel condensation

Abstract 2D polymers have emerged as one of the most promising classes organic photocatalysts for solar fuel production due to their tunability, charge‐transport properties, and robustness. They are however difficult process so there limited studies into formation heterojunction materials incorporating these components. In this work, a novel templating approach is used combine an imine‐based donor polymer acceptor formed through Knoevenagel condensation. Heterojunction shown be highly dependent on topological match with active templated material found between three nine times more photocatalysis than its constituent Transient absorption spectroscopy reveals that improvement faster charge separation efficient extraction in heterojunction. The shows very high hydrogen evolution rate >20 mmol h −1 m −2 ascorbic acid hole scavenger but also produces presence only water cobalt‐based redox mediator. This suggests improved charge‐separation interface reduced trapping accessed could suitable Z‐scheme formation.