Scholarlink

<p>The electrochemical reduction of CO<sub>2</sub> to oxalate has emerged as a promising pathway for both carbon utilization and negative-emission strategies, as it couples renewable electricity with the production of a high-value platform chemical. In this work, we investigated the electroreduction of CO<sub>2</sub> in a novel designed-flow reactor employing stainless steel cathode in an acetonitrile medium. The reactor design was evaluated by varying electrode spacing (0.5, 1, and 2&#xa0;mm) and scaling electrode area (from 10 mm<sup>2</sup> to 656&#xa0;mm²), aiming to enhance mass transport and reduce ohmic losses. Faradaic efficiencies up to 72% and current densities above 130&#xa0;mA cm<sup>−2</sup> were achieved, which surpass previously reported results for flow systems. Notably, scaling up to 656&#xa0;mm² electrodes maintained competitive efficiency while significantly improving oxalate production rates. These results demonstrate one of the few successful demonstrations of CO<sub>2</sub>-to-oxalate conversion in a continuous-flow configuration, highlighting the potential of reactor engineering approaches for advancing scalable and environmentally benign CO<sub>2</sub> electroreduction technologies.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Scalable electrochemical CO2 reduction to oxalate in a continuous flow reactor

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年3月25日

查看全文
  • Dawany Dionisio,
  • Beethoven Narváez-Romo,
  • Lucas N. B. S. Ribeiro,
  • Emílio C. N. Silva,
  • Julio R. Meneghini,
  • Thiago Lopes

摘要

The electrochemical reduction of CO2 to oxalate has emerged as a promising pathway for both carbon utilization and negative-emission strategies, as it couples renewable electricity with the production of a high-value platform chemical. In this work, we investigated the electroreduction of CO2 in a novel designed-flow reactor employing stainless steel cathode in an acetonitrile medium. The reactor design was evaluated by varying electrode spacing (0.5, 1, and 2 mm) and scaling electrode area (from 10 mm2 to 656 mm²), aiming to enhance mass transport and reduce ohmic losses. Faradaic efficiencies up to 72% and current densities above 130 mA cm−2 were achieved, which surpass previously reported results for flow systems. Notably, scaling up to 656 mm² electrodes maintained competitive efficiency while significantly improving oxalate production rates. These results demonstrate one of the few successful demonstrations of CO2-to-oxalate conversion in a continuous-flow configuration, highlighting the potential of reactor engineering approaches for advancing scalable and environmentally benign CO2 electroreduction technologies.