Intermediate-Temperature Electrocatalytic CO <sub>2</sub> Reduction with a Coordination Polymer Glass Electrolyte
Electrocatalytic CO<sub>2</sub> reduction at intermediate temperatures (100-150 °C) has been expected to have many advantages from reaction kinetics and product selectivity viewpoints, but the reaction attempt has been strictly hindered because of the difficulties of membrane-electrode assembly (MEA) fabrication and the limited selection of electrolyte consisting of proton (H<sup>+</sup>)-conductive materials. In this study, we fabricated an MEA for the electrocatalytic reduction of gaseous CO<sub>2</sub> at the intermediate temperatures. Cyclic voltammetry of ferrocene in a H-cell separated by a membrane of [Zn(HPO<sub>4</sub>)(H<sub>2</sub>PO<sub>4</sub>)<sub>2</sub>](ImH<sub>2</sub>)<sub>2</sub> glass (<b>1g</b>, Im = imidazolate) confirmed their H<sup>+</sup>-exchange ability and stability in <i>N</i>-methyl-2-pyrrolidone at 120 °C. We prepared an MEA with <b>1g</b> and confirmed higher catalytic activity and reactant selectivity at 120 °C than at 30 and 80 °C and observed over 99% product selectivity to carbon monoxide (CO) at 80 and 120 °C.
Authors
- Hiroyasu Tabe (ORCID: https://orcid.org/0000-0003-2028-7371)
- Satoshi Horike (ORCID: https://orcid.org/0000-0001-8530-6364)
- Thanakorn Tiyawarakul (ORCID: https://orcid.org/0000-0003-2681-4769)
- Kanokwan Kongpatpanich (ORCID: https://orcid.org/0000-0002-4353-7057)
- Kazuki Urai
- Minoru Isobe (ORCID: https://orcid.org/0000-0002-5244-3300)
- Yuji Namiki
- Karnjana Atthawilai
Institutions
- Kyoto University (JP)
- Pola Chemical Industries (Japan) (JP)
- Division of Materials Science and Engineering (AU)
- Vidyasirimedhi Institute of Science and Technology (TH)
Publication Details
- Journal
- The Journal of Physical Chemistry Letters
- Published
- 2025-12-05
- DOI
- https://doi.org/10.1021/acs.jpclett.5c03283
- Citations
- 1
- Primary Topic
- CO2 Reduction Techniques and Catalysts
- Type
- article
- Field-Weighted Citation Impact
- 0.36