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<p>Next-generation techniques for sustainable carboxylate production generate carboxylate salts as the primary outcome. To circumvent the costly conversion of carboxylate salts to acids, we demonstrate the aqueous (non-)Kolbe electrolysis process as an alternative strategy to generate downstream value-added chemicals. Upon revealing the irreversible oxidation-induced charge transfer inhibition on the graphite anode, we propose an anion intercalation strategy to mitigate the stability problem induced by the ever-increasing overpotential. In acetate decarboxylation, we observe a high Faradaic efficiency of ~95% for non-Kolbe products (methanol and methyl acetate) at wide current densities ranging from 0.05 to 1 A cm<sup>−2</sup> and long-term stability at current densities of 0.15 and 0.6 A cm<sup>−2</sup> for 130 and 35 h, respectively. We also extended this strategy for the upgrading of long-chain carboxylates such as propionate, butyrate, and succinate. Our work provides valuable guidance for carboxylate upgrading and extendable strategy for overcoming passivation challenges in catalysis.</p>

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Anion intercalation enables efficient and stable carboxylate upgrading via aqueous non-Kolbe electrolysis

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年4月19日

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  • Xinyan Zhang,
  • Laihao Luo,
  • Chunxiao Liu,
  • Weiqing Xue,
  • Yuan Ji,
  • Donghao Zhao,
  • Pengbo Liu,
  • Xinran Feng,
  • Jun Luo,
  • Qiu Jiang,
  • Tingting Zheng,
  • Xu Li,
  • Chuan Xia,
  • Jie Zeng

摘要

Next-generation techniques for sustainable carboxylate production generate carboxylate salts as the primary outcome. To circumvent the costly conversion of carboxylate salts to acids, we demonstrate the aqueous (non-)Kolbe electrolysis process as an alternative strategy to generate downstream value-added chemicals. Upon revealing the irreversible oxidation-induced charge transfer inhibition on the graphite anode, we propose an anion intercalation strategy to mitigate the stability problem induced by the ever-increasing overpotential. In acetate decarboxylation, we observe a high Faradaic efficiency of ~95% for non-Kolbe products (methanol and methyl acetate) at wide current densities ranging from 0.05 to 1 A cm−2 and long-term stability at current densities of 0.15 and 0.6 A cm−2 for 130 and 35 h, respectively. We also extended this strategy for the upgrading of long-chain carboxylates such as propionate, butyrate, and succinate. Our work provides valuable guidance for carboxylate upgrading and extendable strategy for overcoming passivation challenges in catalysis.