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<p>Geoelectrochemical reduction of CO<sub>2</sub> is proposed as a potentially significant abiotic synthesis pathway catalyzed by sulfide minerals under planetary conditions, but whether this reaction could be catalyzed by geologically abundant carbonate and phyllosilicate minerals is unknown. Here we show that adsorption of trace transition metal cations, such as Cu(II) and Zn(II), endows common Ca/Mg-carbonates and phyllosilicates with high catalytic performance for CO<sub>2</sub> reduction to form methane, formic acid, carbon monoxide, and C<sub>2</sub> organics. We also observe viable synthesis of C-N bonded compounds (mainly acetamide) when ammonia is present. During these reactions, the adsorbed metal cations are partially reduced into metallic states and become catalytic, while mineral substrates facilitate the water dissociation to supply protons for CO<sub>2</sub> hydrogenation. This facile electrochemical reduction of CO<sub>2</sub> catalyzed by carbonates and phyllosilicates could facilitate the origin of life on the primitive Earth and help explain the detection of organics on other habitable planetary bodies.</p>

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Abiotic CO2 reduction promoted by carbonate and phyllosilicate minerals on the primitive seafloor

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年4月9日

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  • Yuan Zhong,
  • Ning Zhang,
  • Daoming Huan,
  • Jingxiang Low,
  • Isabelle Daniel,
  • H. James Cleaves II,
  • Chao Zhang,
  • Yamei Li,
  • Yawen Jiang,
  • Xinyu Wang,
  • Christopher R. Glein,
  • Jiawei Li,
  • Yu Bai,
  • Yaping Li,
  • Fang Huang,
  • Liping Qin,
  • Andrew H. Knoll,
  • Jihua Hao,
  • Ran Long,
  • Yujie Xiong

摘要

Geoelectrochemical reduction of CO2 is proposed as a potentially significant abiotic synthesis pathway catalyzed by sulfide minerals under planetary conditions, but whether this reaction could be catalyzed by geologically abundant carbonate and phyllosilicate minerals is unknown. Here we show that adsorption of trace transition metal cations, such as Cu(II) and Zn(II), endows common Ca/Mg-carbonates and phyllosilicates with high catalytic performance for CO2 reduction to form methane, formic acid, carbon monoxide, and C2 organics. We also observe viable synthesis of C-N bonded compounds (mainly acetamide) when ammonia is present. During these reactions, the adsorbed metal cations are partially reduced into metallic states and become catalytic, while mineral substrates facilitate the water dissociation to supply protons for CO2 hydrogenation. This facile electrochemical reduction of CO2 catalyzed by carbonates and phyllosilicates could facilitate the origin of life on the primitive Earth and help explain the detection of organics on other habitable planetary bodies.