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<p>As industrial demand for electricity grows, the high energy cost of electrifying chemical production is of further-increased concern: the most efficient oxygen-evolution-coupled ethylene electrosynthesis system requires &gt;130 GJ<sub>electricity</sub> per ton of C<sub>2</sub>H<sub>4</sub> and is limited to &lt;10-hour stability when powered using intermittent electricity. Here we pursued ethylene electroproduction employing a more energetic feedstock—syngas—available from thermo-gasification, to reduce electricity consumption of the whole ethylene production process, and we constructed an all-gas-fed system to avoid caustic electrolyte. We identified a key challenge in such a system: when no alkali anolyte was present, known solid-state electrolytes were ineffective in activating the CO-to-ethylene transformation. We therefore explored a suite of candidate ionomers and evaluated codesign for high ion-exchange capacity united with optimized cation binding. We identify polyacrylate as an efficient host that enables C<sub>2</sub>H<sub>4</sub> production at 1.2 V and 100 mA cm<sup>−</sup><sup>2</sup> (49 GJ<sub>electricity</sub> per ton of C<sub>2</sub>H<sub>4</sub>) in the solid-state system that operates stably for over 80 hours and after 30 on/off cycles when powered using intermittent electricity.</p>

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A cation-functionalized layer for ethylene electrosynthesis via CO reduction paired with H2 oxidation in a pure-water-fed solid-state electrolyser

  • 期刊论文

  • 发表日期：

    2026年2月17日

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  • Bosi Peng,
  • Zeyan Liu,
  • Xiangyu Ma,
  • Weiyan Ni,
  • Aamir Hassan Shah,
  • Charles B. Musgrave III,
  • Hyundo Park,
  • Jin Huang,
  • Aditya Menon,
  • Mercouri G. Kanatzidis,
  • Ke Xie,
  • Edward H. Sargent

摘要

As industrial demand for electricity grows, the high energy cost of electrifying chemical production is of further-increased concern: the most efficient oxygen-evolution-coupled ethylene electrosynthesis system requires >130 GJelectricity per ton of C2H4 and is limited to <10-hour stability when powered using intermittent electricity. Here we pursued ethylene electroproduction employing a more energetic feedstock—syngas—available from thermo-gasification, to reduce electricity consumption of the whole ethylene production process, and we constructed an all-gas-fed system to avoid caustic electrolyte. We identified a key challenge in such a system: when no alkali anolyte was present, known solid-state electrolytes were ineffective in activating the CO-to-ethylene transformation. We therefore explored a suite of candidate ionomers and evaluated codesign for high ion-exchange capacity united with optimized cation binding. We identify polyacrylate as an efficient host that enables C2H4 production at 1.2 V and 100 mA cm−2 (49 GJelectricity per ton of C2H4) in the solid-state system that operates stably for over 80 hours and after 30 on/off cycles when powered using intermittent electricity.