2026-04-24 東北大学
図1. 光触媒によるOWSの概念図。
＜関連情報＞
- https://www.tohoku.ac.jp/japanese/2026/04/press20260424-03-water.html
- https://www.tohoku.ac.jp/japanese/newimg/pressimg/tohokuuniv-press20250424_03web_water.pdf
- https://www.nature.com/articles/s41557-026-02133-6
二次元金属有機構造体は、光触媒による水分解反応全体において、オールインワンの助触媒として機能する Two-dimensional metal–organic frameworks offer all-in-one cocatalysts for photocatalytic overall water splitting
Jingyan Guan,Hajime Suzuki,Kazuhide Kamiya,Takashi Harada,Rintaro Adachi,Osamu Tomita,Hirofumi Kurokawa,Daisuke Unabara,Koji Yonekura,Naoya Fukui,Hiroaki Maeda,Kunihisa Sugimoto,Yuichi Yamaguchi,Akinori Saeki,Akira Yamakata,Akihiko Kudo,Ryu Abe & Ryota Sakamoto
Nature Chemistry Published:23 April 2026
DOI:https://doi.org/10.1038/s41557-026-02133-6
Abstract
Photocatalytic overall water splitting holds great promise for sustainable hydrogen production. For overall water splitting performed by one-step excitation, both the hydrogen evolution and oxygen evolution reactions are hindered kinetically; hence, it is necessary to employ site-selective modification of photocatalysts with hydrogen-evolving and oxygen-evolving cocatalysts. However, critical challenges remain, including the need for cumbersome, multi-step photodeposition processes and durable blocking layers to inhibit the reverse reactions. Here we find a conductive, two-dimensional metal–organic framework to serve as a simple, multifunctional cocatalyst. We loaded this framework on SrTiO3:Al, an overall water-splitting photocatalyst, using a one-step self-assembly method. The framework cocatalyst promoted steady photocatalysis with an apparent quantum efficiency of 31.5% at 350 nm, free from the reverse reaction even without blocking layers. We proposed the operational principles for the cocatalyst activity using spectroscopic, electrochemical and theoretical analyses. This two-dimensional metal–organic framework offers an all-in-one approach for designing efficient and practical one-step excitation overall water-splitting systems.
