Operando Topography and Mechanical Property Mapping of CO 2 Reduction Gas-Diffusion Electrodes Operating at High Current Densities

Nesbitt, Nathan T.; Smith, Wilson A.

doi:10.1149/1945-7111/abf183

Title: Operando Topography and Mechanical Property Mapping of CO ₂ Reduction Gas-Diffusion Electrodes Operating at High Current Densities

Abstract

Electrochemical atomic force microscopy (EC-AFM) enables measurement of electrode topography and mechanical properties during electrochemical reactions. However, for aqueous-based reactions that make gas products, such as CO ₂ reduction and water splitting into CO/H ₂ , current densities below 1 mA cm ⁻² have been necessary to prevent formation of bubbles at the electrode; such bubbles can stick to the AFM probe and prevent further AFM imaging. Here, we demonstrate a novel cell design with a gas-diffusion electrode (GDE) to exhaust the gas products, thereby enabling high current density EC-AFM measurements at 1, 10, and 100 mA cm ⁻² that are not disturbed by bubble formation at the electrode surface. These experiments revealed a stable morphological structure of Cu catalysts deposited on GDEs during high current density operation. Systematic spatially resolved maps of deformation and adhesion showed no signs of a gas-liquid interface between catalyst particles of the GDE.

Authors:

;

Publication Date:: Wed Apr 07 00:00:00 EDT 2021

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

Sponsoring Org.:: USDOE Laboratory Directed Research and Development (LDRD) Program; European Research Council (ERC)

OSTI Identifier:: 1835441

Alternate Identifier(s):: OSTI ID: 1782713

Report Number(s):: NREL/JA-5900-78258
Journal ID: ISSN 0013-4651

Grant/Contract Number:: AC36-08GO28308; 759743-WUTANG

Resource Type:: Published Article

Journal Name:: Journal of the Electrochemical Society

Additional Journal Information:: Journal Name: Journal of the Electrochemical Society Journal Volume: 168 Journal Issue: 4; Journal ID: ISSN 0013-4651

Publisher:: The Electrochemical Society

Country of Publication:: United States

Language:: English

Subject:: 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; electrochemical; atomic force microscopy; gas diffusion electrode; CO2 reduction; high current density; electrolysis

Citation Formats


                    Nesbitt, Nathan T., and Smith, Wilson A. Operando Topography and Mechanical Property Mapping of CO 2 Reduction Gas-Diffusion Electrodes Operating at High Current Densities.  United States: N. p., 2021. 
Web.  doi:10.1149/1945-7111/abf183.

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                    Nesbitt, Nathan T., & Smith, Wilson A. Operando Topography and Mechanical Property Mapping of CO 2 Reduction Gas-Diffusion Electrodes Operating at High Current Densities.  United States.  https://doi.org/10.1149/1945-7111/abf183

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                    Nesbitt, Nathan T., and Smith, Wilson A. Wed .  
"Operando Topography and Mechanical Property Mapping of CO 2 Reduction Gas-Diffusion Electrodes Operating at High Current Densities".  United States.  https://doi.org/10.1149/1945-7111/abf183.

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@article{osti_1835441,

  title        = {Operando Topography and Mechanical Property Mapping of CO 2 Reduction Gas-Diffusion Electrodes Operating at High Current Densities},

  author       = {Nesbitt, Nathan T. and Smith, Wilson A.},

  abstractNote = {Electrochemical atomic force microscopy (EC-AFM) enables measurement of electrode topography and mechanical properties during electrochemical reactions. However, for aqueous-based reactions that make gas products, such as CO 2 reduction and water splitting into CO/H 2 , current densities below 1 mA cm −2 have been necessary to prevent formation of bubbles at the electrode; such bubbles can stick to the AFM probe and prevent further AFM imaging. Here, we demonstrate a novel cell design with a gas-diffusion electrode (GDE) to exhaust the gas products, thereby enabling high current density EC-AFM measurements at 1, 10, and 100 mA cm −2 that are not disturbed by bubble formation at the electrode surface. These experiments revealed a stable morphological structure of Cu catalysts deposited on GDEs during high current density operation. Systematic spatially resolved maps of deformation and adhesion showed no signs of a gas-liquid interface between catalyst particles of the GDE.},

  doi          = {10.1149/1945-7111/abf183},

  journal      = {Journal of the Electrochemical Society},

  number       = 4,

  volume       = 168,

  place        = {United States},

  year         = {Wed Apr 07 00:00:00 EDT 2021},

  month        = {Wed Apr 07 00:00:00 EDT 2021}

}

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Title: Operando Topography and Mechanical Property Mapping of CO 2 Reduction Gas-Diffusion Electrodes Operating at High Current Densities

Abstract

Citation Formats

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Title: Operando Topography and Mechanical Property Mapping of CO ₂ Reduction Gas-Diffusion Electrodes Operating at High Current Densities

The effect of PeakForce tapping mode AFM imaging on the apparent shape of surface nanobubbles
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Potential-Sensing Electrochemical AFM Shows CoPi as a Hole Collector and Oxygen Evolution Catalyst on BiVO ₄ Water-Splitting Photoanodes
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Effect of contact deformations on the adhesion of particles
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journal, June 2020

Dynamic Changes in the Structure, Chemical State and Catalytic Selectivity of Cu Nanocubes during CO ₂ Electroreduction: Size and Support Effects
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