海洋炭素リサイクルシステムでCO₂を有用化学物質に変換（Artificial Ocean Carbon Recycling System Converts Seawater CO2 into Valuable Chemicals）

2025-10-13 中国科学院（CAS）

＜関連情報＞

• https://english.cas.cn/newsroom/research_news/chem/202510/t20251014_1089401.shtml
• https://www.nature.com/articles/s41929-025-01416-4

海洋炭素源をバイオプラスチックモノマーに効率的かつスケーラブルにアップサイクルする Efficient and scalable upcycling of oceanic carbon sources into bioplastic monomers

Chengbo Li,Mingming Guo,Bo Yang,Yuan Ji,Jing Zhang,Liujiang Zhou,Chunxiao Liu,Haoyuan Wang,Jiawei Li,Weiqing Xue,Xinyan Zhang,Hongliang Zeng,Yanjiang Wang,Donghao Zhao,Kexin Zhong,Shanshan Pi,Minzhe Hei,Xu Li,Qiu Jiang,Tingting Zheng,Xiang Gao & Chuan Xia
Nature Catalysis  Published:06 October 2025
DOI:https://doi.org/10.1038/s41929-025-01416-4

Abstract

Renewable electricity-driven capture and conversion of oceanic dissolved inorganic carbon into value-added chemicals offers a sustainable route towards negative carbon emissions and a circular carbon economy. Here we present an artificial ocean carbon recycling system that captures and converts oceanic carbon sources into biochemicals through a decoupled electro-biocatalytic hybrid process. The system captures CO₂ from natural seawater under very dilute yet realistic dissolved inorganic carbon conditions (2.16 mM) with high capture efficiency (>70%), low energy consumption (3 kWh kgCO₂⁻¹) and long stability (536 h). Techno-economic analysis revealed a competitive cost of capture (US$229.9 tCO₂⁻¹). Using a highly efficient and stable bismuth-based electrocatalyst, CO₂ was further converted into pure formic acid (800 mA cm⁻² at −1.37 V) and subsequently transformed by engineered Vibrio natriegens into succinic acid (1.37 g l⁻¹). Therefore, our electro-bioconversion system represents a solution to sustainable biochemical synthesis using the ocean carbon sink as a resource.