An All ‐In‐One Integrating Strategy for Designing Platinum(II)‐Based Supramolecular Polymers for Photocatalytic Hydrogen Evolution

A series of chalcogenoviologen-containing platinum(II)-based supramolecular polymers featuring distinctive donor –acceptor structures for efficient hydrogen evolution is designed. Incorporating the photosensitizer, electron transfer mediator and catalyst into a unified photocatalytic system can minimize the electron transfer distance between photosensitizer and active sites, reducing the possibility of elect ron–hole recombination and enhancing the photocatalytic performance. AbstractOrganic polymer photocatalysts have achieved significant progress in photocatalytic hydrogen evolution, while developing the integrated organic polymers possessing the functions of photosensitizer, electron transfer mediator, and catalyst simultaneously is urgently needed and presents a great challenge. Considering that chalcogenoviologens are able to act as photosensitizers and electron-transfer mediators, a series of chalcogenoviologen-containing platinum(II)-based supramolecular polymers is designed, which exhibited strong visible light-absorbing ability and suitable bandgap for highly efficient photocatalytic hydrogen evolution without the use of a cocatalyst. The hydrogen evolution rate (HER) increases steadily with the decrease in an optical gap of the polymer. Among these “all-in-one” polymers, Se-containing 2D porous polymer exhibited the best photocatalytic performance with a HER of 3.09 mmol g−1 h−1 under visible light (>420  nm) irradiation. Experimental and theoreti...

Source: Small - April 16, 2024 Category: Nanotechnology Authors: Yanyan Qin, Pengfei She, Yidi Wang, Wai ‐Yeung Wong Tags: Research Article Source Type: research