Highly selective CO2 electrolysis in aqueous media by a water-soluble cobalt dimethyl-bipyridine complex

Tomiko M. Suzuki; Kengo Nagatsuka; Takamasa Nonaka; Yuichi Yamaguchi; Naonari Sakamoto; Takeshi Uyama; Keita Sekizawa; Akihiko Kudo; Takeshi Morikawa

doi:10.1039/D3CC03940D

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Highly selective CO₂ electrolysis in aqueous media by a water-soluble cobalt dimethyl-bipyridine complex†

Tomiko M. Suzuki,

*^a Kengo Nagatsuka,^b Takamasa Nonaka,

^a Yuichi Yamaguchi,

^bc Naonari Sakamoto,

^a Takeshi Uyama,

^a Keita Sekizawa,

^a Akihiko Kudo*^bc and Takeshi Morikawa

*^a

Author affiliations

* Corresponding authors

^a Toyota Central R&D Labs., Inc., 41-1 Yokomichi, Nagakute, Aichi 480-1192, Japan
E-mail: tomiko@mosk.tytlabs.co.jp, morikawa@mosk.tytlabs.co.jp

^b Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
E-mail: a-kudo@rs.tus.ac.jp

^c Carbon Value Research Center, Research Institute for Science & Technology, Tokyo University of Science, 2641 Yamazaki, Noda-shi, Chiba 278-8510, Japan

Abstract

A water-soluble Co complex with dimethyl-bipyridine ligands reduced CO₂ to CO electrochemically with almost 100% selectivity at −0.80 V vs. NHE in an aqueous medium (pH 6.8) without an organic solvent. The reaction overpotential was 270 mV. A possible CO formation mechanism was discussed based on experiments and calculations.

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Article information

DOI: https://doi.org/10.1039/D3CC03940D
Article type: Communication
Submitted: 15 Aug 2023
Accepted: 19 Sep 2023
First published: 20 Sep 2023
This article is Open Access

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Chem. Commun., 2023,59, 12318-12321

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Highly selective CO₂ electrolysis in aqueous media by a water-soluble cobalt dimethyl-bipyridine complex

T. M. Suzuki, K. Nagatsuka, T. Nonaka, Y. Yamaguchi, N. Sakamoto, T. Uyama, K. Sekizawa, A. Kudo and T. Morikawa, Chem. Commun., 2023, 59, 12318 DOI: 10.1039/D3CC03940D

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