太陽光駆動CO2変換のための電荷貯蔵触媒システムを開発（Researchers Develop Charge-Reservoir Catalyst System for Sunlight-Driven CO2 Conversion）

2026-02-12 中国科学院(CAS)

＜関連情報＞

• https://english.cas.cn/newsroom/research-news/202602/t20260224_1151121.shtml
• https://www.nature.com/articles/s41467-026-68991-3

生物に着想を得た電荷貯蔵庫は、タングステンの価数振動を介してH2Oによる効率的なCO2光還元を可能にする Bioinspired charge reservoir enables efficient CO2 photoreduction with H2O via tungsten valence oscillation

Yu Huang,Xianjin Shi,Hongna Zhang,Junji Cao & Shuncheng Lee
Nature Communications  Published:31 January 2026
DOI:https://doi.org/10.1038/s41467-026-68991-3  An unedited version of this manuscript

Abstract

Solar-driven conversion of CO₂ and H₂O into chemicals is a promising strategy, while achieving simultaneous and efficient CO₂ reduction and H₂O oxidation remains challenging. Here, inspired by the role of plastoquinone in temporarily storing electrons during natural photosynthesis, we design a silver-modified tungsten trioxide (Ag/WO₃) that functions as a charge reservoir through reversible W⁶⁺/W⁵⁺ transitions under irradiation. When coupled with various active components, Ag/WO₃ significantly enhances their CO₂ conversion performance, indicating the universality of this strategy. Specifically, coupling Ag/WO₃ with cobalt phthalocyanine (CoPc), the CoPc/Ag/WO₃ catalyst achieves a CO production rate of ~1.5 mmol g_CoPc⁻¹ h⁻¹, representing a 100-fold enhancement over pure CoPc. Mechanistic studies reveal that electrons stored in Ag/WO₃ efficiently scavenge photogenerated holes from CoPc, thereby maintaining a high electron density at CO₂ reduction sites of CoPc. This work establishes a bioinspired charge reservoir strategy for efficient CO₂ photoreduction, providing a universal approach to solar fuel production.