The effect of catholyte and catalyst layer binders on CO2 electroreduction selectivity

Chen, Yingying; Wrubel, Jacob A.; Vise, Ashlee E.; Intia, Fry; Harshberger, Samantha; Klein, Ellis; Smith, Wilson A.; Ma, Zhiwen; Deutsch, Todd G.; Neyerlin, Kenneth C.

doi:10.1016/j.checat.2022.01.011

Title: The effect of catholyte and catalyst layer binders on CO₂ electroreduction selectivity

Journal Article · 08 February 2022 · Chem Catalysis

DOI: https://doi.org/10.1016/j.checat.2022.01.011 · OSTI ID:1860233

^[1];

^[1]; Intia, Fry ^[1]; Harshberger, Samantha ^[2]; Klein, Ellis ^[1]; Smith, Wilson A. ^[3];

^[1];

^[1]; Neyerlin, Kenneth C. ^[1]

National Renewable Energy Lab. (NREL), Golden, CO (United States)
Fort Range Community College, Westminster, CO (United States)
National Renewable Energy Lab. (NREL), Golden, CO (United States); Univ. of Colorado, Boulder, CO (United States)

Electrochemical reduction of carbon dioxide (CO₂) is an attractive technology for converting CO₂ to value-added chemicals by using renewably generated electricity. This work combines both experimental and theoretical analyses to investigate the role of different catalysts (Ag/Vu and SnO₂/Vu), binder materials, and catholyte compositions on the selectivity of a CO₂ electrolysis cell to the two-electron CO₂ reduction products CO and formate. As a complementary effort, a 2D multi-physics transport model was developed to elucidate the fundamental processes and species concentrations in the cathode components. It was shown that the selectivity of CO₂ reduction to CO can change significantly when different catholyte compositions and binder materials are used, whereas the selectivity of CO₂ to formate is relatively stable across the conditions studied. These insights can be used to inform decisions regarding the electrode development and system design in CO₂ electrolyzers and ultimately contribute to scaling energy-efficient electrochemical CO₂-reduction systems.

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Research Organization:: National Renewable Energy Laboratory (NREL), Golden, CO (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Hydrogen and Fuel Cell Technologies Office (EE-3F)

Grant/Contract Number:: AC36-08GO28308

OSTI ID:: 1860233

Report Number(s):: NREL/JA-5700-79956; MainId:40163; UUID:de8a839a-db76-4c83-b599-2329e3674c80; MainAdminID:63315

Journal Information:: Chem Catalysis, Journal Name: Chem Catalysis Journal Issue: 2 Vol. 2; ISSN 2667-1093

Publisher:: Cell PressCopyright Statement

Country of Publication:: United States

Language:: English

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Title: The effect of catholyte and catalyst layer binders on CO2 electroreduction selectivity

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Title: The effect of catholyte and catalyst layer binders on CO₂ electroreduction selectivity