A Cu hollow fiber with coaxially grown Bi nanosheet arrays as an integrated gas-penetrable electrode enables high current density and durable formate electrosynthesis

Meng, Zhe; Wang, Fang; Zhang, Zhengguo; Min, Shixiong

doi:10.1039/d3nr05982k

Nanoscale

2024

DOI: 10.1039/d3nr05982k

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A Cu hollow fiber with coaxially grown Bi nanosheet arrays as an integrated gas-penetrable electrode enables high current density and durable formate electrosynthesis

Zhe Meng,

Fang Wang,

Zhengguo Zhang

et al.

Abstract: While high-current-density formate (HCOO-) electrosynthesis from CO2 reduction is achieved in a flow cell assembly, the inevitable flooding and salt precipitation of traditional gas-diffusion electrodes (GDEs) severely limit the overall...

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Advances and Challenges of Carbon‐Free Gas‐Diffusion Electrodes (GDEs) for Electrochemical CO₂ Reduction

Rabiee,

Ma,

Yang

et al. 2024

Adv Funct Materials

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Electrochemical CO2 reduction reaction (CO2RR) coupled with renewable electricity holds promises for efficient mitigation of carbon emission impacts on the environment and turning CO2 into valuable chemicals. One important task in CO2RR development is the design and fabrication of efficient electrodes for stable operation in the long term. Gas‐diffusion electrodes (GDEs) have been employed to continuously feed CO2 to the electrolyzers. Despite significant advances in GDE design and tailoring GDE properties, the present GDEs often suffer from the critical issue of flooding due to the electrowetting of carbon‐based substrates, which hinders the transition to industrial application. To address flooding, GDEs with intrinsically hydrophobic polymeric substrates have been recently fabricated and have shown promising performances. Herein, the advances and challenges associated with carbon‐free GDEs are reviewed for CO2RR. This review first briefly outlines GDE and electrolyzers basics. Through critical discussion around the shortcomings of conventional carbon‐based GDEs, the most recent efforts to resolve flooding are summarized. Subsequently, the advances, advantages, and challenges of carbon‐free GDEs are elaborated. Finally, priorities for future studies are suggested, with the aim to support the advancement and scale‐up of carbon‐free GDEs and extend them to other electrochemical systems where gas and the electrolyte are in contact.

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Advances and Challenges of Carbon‐Free Gas‐Diffusion Electrodes (GDEs) for Electrochemical CO₂ Reduction

Rabiee,

Ma,

Yang

et al. 2024

Adv Funct Materials

View full text Add to dashboard Cite

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Ultra-thin bismuth nanosheets on copper foam enabling high-efficiency electrocatalytic nitrogen reduction for ammonia synthesis

Tu,

Li,

Pan

et al. 2024

Journal of Power Sources

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Microenvironment Regulation, Promoting CO₂ Conversion to Mono- and Multicarbon Products over Cu-Based Catalysts

Liu,

Sun,

Peng

et al. 2024

Ind. Eng. Chem. Res.

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This Review summarizes recent advancements in regulating microenvironments for enhancing CO 2 conversion, particularly focusing on copper-based catalysts, which are crucial for transforming CO 2 to valuable chemicals and fuels. We discuss strategies for microenvironment regulation, including single-atom catalyst design, particle size/facets/morphology control, confinement effects, and interfacial engineering. These approaches influence the efficiency and selectivity of CO 2 conversion by optimizing active site density, controlling reactant/intermediate concentrations, and promoting charge-transfer processes. We highlight the importance of enhancing mass transfer, optimizing electrolyte properties, and modifying electrode structures in improving the CO 2 conversion. Despite significant progress, challenges remain in electrocatalytically achieving high current densities for multicarbon products, and developing effective strategies to quantify the contribution of the microenvironment to catalytic performance. Future research will focus on developing advanced characterization techniques, exploring novel materials and synthesis methods, utilizing machine learning and theoretical modeling for catalyst design and optimization.

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A Cu hollow fiber with coaxially grown Bi nanosheet arrays as an integrated gas-penetrable electrode enables high current density and durable formate electrosynthesis

Abstract: While high-current-density formate (HCOO-) electrosynthesis from CO2 reduction is achieved in a flow cell assembly, the inevitable flooding and salt precipitation of traditional gas-diffusion electrodes (GDEs) severely limit the overall...

Cited by 5 publications

References 46 publications

Advances and Challenges of Carbon‐Free Gas‐Diffusion Electrodes (GDEs) for Electrochemical CO₂ Reduction

Advances and Challenges of Carbon‐Free Gas‐Diffusion Electrodes (GDEs) for Electrochemical CO₂ Reduction

Ultra-thin bismuth nanosheets on copper foam enabling high-efficiency electrocatalytic nitrogen reduction for ammonia synthesis

Microenvironment Regulation, Promoting CO₂ Conversion to Mono- and Multicarbon Products over Cu-Based Catalysts

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A Cu hollow fiber with coaxially grown Bi nanosheet arrays as an integrated gas-penetrable electrode enables high current density and durable formate electrosynthesis

Abstract: While high-current-density formate (HCOO-) electrosynthesis from CO2 reduction is achieved in a flow cell assembly, the inevitable flooding and salt precipitation of traditional gas-diffusion electrodes (GDEs) severely limit the overall...

Cited by 5 publications

References 46 publications

Advances and Challenges of Carbon‐Free Gas‐Diffusion Electrodes (GDEs) for Electrochemical CO2 Reduction

Advances and Challenges of Carbon‐Free Gas‐Diffusion Electrodes (GDEs) for Electrochemical CO2 Reduction

Ultra-thin bismuth nanosheets on copper foam enabling high-efficiency electrocatalytic nitrogen reduction for ammonia synthesis

Microenvironment Regulation, Promoting CO2 Conversion to Mono- and Multicarbon Products over Cu-Based Catalysts

Contact Info

Product

Resources

About

Advances and Challenges of Carbon‐Free Gas‐Diffusion Electrodes (GDEs) for Electrochemical CO₂ Reduction

Advances and Challenges of Carbon‐Free Gas‐Diffusion Electrodes (GDEs) for Electrochemical CO₂ Reduction

Microenvironment Regulation, Promoting CO₂ Conversion to Mono- and Multicarbon Products over Cu-Based Catalysts