（11月17日）Photocatalytic CO2 Reduction Using Metal Complexes As Key Players

报告时间：2025年11月17日上午10:00-11:00

报告地点：福州大学阳光科技大厦二楼会议室

报 告 人：Osamu Ishitani（日本东京工业大学/广岛大学）

主持人：安保正一 教授

组织单位：光催化重点实验室

联系人：林珍珍

联系方式：13675091109

报告摘要:

We should develop artificial systems which can convert CO2 to useful and energy-rich compounds by using solar energy because of solving the global worming problem and shortage of energy and carbon resources. We have been tackling this target by using transition-metal complexes as key players. In this presentation, I mainly talk about two projects, i.e., (1) supramolecular photocatalysts with both functions as photosensitizer and catalysts and (2) photocatalytic CO2 reduction coupled to water oxidation.

(1) Highly efficient supramolecular photocatalysts for CO2 reduction

Since CO2 is the most oxidized state of carbon, one-electron reduction of CO2 is an extraordinarily high endergonic reaction. From the viewpoints of low-energy light, i.e., visible light, application, the multi-electron reduction of CO2 via chemical reactions promises to be a more valuable process. This is a main reason why both a photosensitizer and a catalyst are required to promote efficient photocatalytic CO2 reduction. We have tried to optimize their properties for the photocatalytic reactions. We have also developed so-called supramolecular photocatalyts that have both the photosensitizer and the catalyst units. This bonding in the supramolecular photocatalysts can accelerate electron transfer between the two units, which improves the performance of the photocatalytic system, especially on the surface of photofunctional solid materials as described below.

(2) Dye-sensitized molecular photocathodes for photocatalytic CO2 reduction with water as a reductant

The molecular photocatalytic systems have a weakness, i.e., weak oxidation power in the excited state. For practical application, water should be used as an electron donor. For overcoming this problem, we have developed a hybrid system consisting of the supramolecular photocatalyst and semiconductor electrodes. The hybrid photoelectrochemical cell consisting of this hybrid photocathode and n-type semiconductor photoanode induced visible-light-driven CO2 reduction with water as a reductant to generate CO and O2 or H2O2.

报告人简介：

Osamu Ishitani教授1987年博士毕业于大阪大学，1988在Advanced Institute of Science & Technology (先进科学技术研究所)担任研究员，2006年成为东京工业大学教授，2022年至今作为特聘教授受聘于广岛大学。曾任日本光化学学会会长和日本化学会副会长，荣获日本光化学会奖、亚太光化学会奖以等。Osamu Ishitani教授从事人工光合作用的研究已超过30年。他的团队的主要研究内容包括光催化 CO2 还原、过渡金属配合物的光化学性质、光功能金属配合物以及由金属配合物和半导体材料组成的混合光催化剂等。迄今，已在J. Am. Chem. Soc.、Angew. Chem., Int. Ed.、Acc. Chem. Res.等国际期刊上发表学术论文240余篇，引用超过1.6万次。