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<p>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 CO<sub>2</sub> from natural seawater under very dilute yet realistic dissolved inorganic carbon conditions (2.16 mM) with high capture efficiency (&gt;70%), low energy consumption (3 kWh kgCO<sub>2</sub><sup>−1</sup>) and long stability (536 h). Techno-economic analysis revealed a competitive cost of capture (US$229.9 tCO<sub>2</sub><sup>−1</sup>). Using a highly efficient and stable bismuth-based electrocatalyst, CO<sub>2</sub> was further converted into pure formic acid (800 mA cm<sup>−2</sup> at −1.37 V) and subsequently transformed by engineered <i>Vibrio natriegens</i> into succinic acid (1.37 g l<sup>−1</sup>). Therefore, our electro-bioconversion system represents a solution to sustainable biochemical synthesis using the ocean carbon sink as a resource.</p><p></p>

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Efficient and scalable upcycling of oceanic carbon sources into bioplastic monomers

  • 期刊论文

  • 发表日期：

    2025年10月6日

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  • 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

摘要

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.