Enhanced Electrocatalytic CO₂ Reduction to C₂₊ Products by Adjusting the Local Reaction Environment with Polymer Binders Article Swipe

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Thi Ha My Pham , Jie Zhang , Mo Li , Tzu‐Hsien Shen , Youngdon Ko , Vasiliki Tileli , Wen Luo , Andreas Züttel ·

YOU? · · 2022 · Open Access · · DOI: https://doi.org/10.1002/aenm.202103663

The activity and selectivity of the electrochemical CO 2 reduction reaction (CO 2 RR) are often hindered by the limited access of CO 2 to the catalyst surface and overtaken by the competing hydrogen evolution reaction. Herein, it is revealed that polymers used as catalyst binders can effectively modulate the accessibility of CO 2 relative to H 2 O at the vicinity of the catalyst and thus the performance of CO 2 RR. Three polymers with different hydrophilicities (i.e., polyacrylic acid (PAA), Nafion, and fluorinated ethylene propylene (FEP)) are selected as binders for Cu catalysts. At a thickness of only ≈1.2 nm, these binders strongly affect the activity and selectivity toward multi‐carbon (C 2+ ) products. The FEP coated catalyst exhibits a C 2+ partial current density of over 600 mA cm −2 with ≈77% faradaic efficiency at −0.76 V versus RHE. This high performance is attributed to the hydrophobic (aerophilic) properties of FEP, which reduces the local concentration of H 2 O and enhances that of the reactant (i.e., CO 2 ) and the reaction intermediates (i.e., CO). These findings suggest that tuning the hydrophobicity of electrocatalysts with polymer binders can be a promising way to regulate the performance of electrochemical reactions involving gas–solid–liquid interfaces.

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Catalysis Materials science Selectivity Polymer Electrochemistry Faraday efficiency Polyacrylic acid Chemical engineering Electrocatalyst Nafion Inorganic chemistry Electrode Organic chemistry Physical chemistry Chemistry Composite material Engineering

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Type: article
Language: en
Landing Page: https://doi.org/10.1002/aenm.202103663
PDF: https://onlinelibrary.wiley.com/doi/pdfdirect/10.1002/aenm.202103663
OA Status: hybrid
Cited By: 163
References: 48
Related Works: 10
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DOI: https://doi.org/10.1002/aenm.202103663

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Title: Enhanced Electrocatalytic CO₂ Reduction to C₂₊ Products by Adjusting the Local Reaction Environment with Polymer Binders

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Type: article

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Language: en

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Publication year: 2022

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Publication date: 2022-01-05

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Authors: Thi Ha My Pham, Jie Zhang, Mo Li, Tzu‐Hsien Shen, Youngdon Ko, Vasiliki Tileli, Wen Luo, Andreas Züttel

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Landing page: https://doi.org/10.1002/aenm.202103663

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Concepts: Catalysis, Materials science, Selectivity, Polymer, Electrochemistry, Faraday efficiency, Polyacrylic acid, Chemical engineering, Electrocatalyst, Nafion, Inorganic chemistry, Electrode, Organic chemistry, Physical chemistry, Chemistry, Composite material, Engineering

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Cited by: 163

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Enhanced Electrocatalytic CO2 Reduction to C2+ Products by Adjusting the Local Reaction Environment with Polymer Binders Article Swipe

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Enhanced Electrocatalytic CO₂ Reduction to C₂₊ Products by Adjusting the Local Reaction Environment with Polymer Binders Article Swipe