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Title: A Robust, Scalable Platform for the Electrochemical Conversion of CO2 to Formate: Identifying Pathways to Higher Energy Efficiencies

Abstract

This work demonstrated a robust, scalable cell architecture for electroreduction of CO2 (CO2R). An up to 90% faradaic efficiency for the conversion of CO2R to formate at 500 mA/cm2 was realized at a 25 cm2 gas diffusion electrode (GDE) with a carbon-supported SnO2 electrocatalyst. Furthermore, a 1.27 mm thick catholyte was used between the bipolar membrane and cathode GDE, which could be further reduced to tens of micrometers upon refinement. The deconvolution of the potential drop from each individual component/process guides the pathways to higher energy efficiencies of CO2R at this platform. Significant changes in the agglomerate size and aspect ratio on the electrode before and after an 11 h test were revealed by nano-CT, suggesting reduced CO2 accessibility from electrode degradation. The versatility of this CO2R testing platform enables the ability to assess materials, components, and interactions at scales more in line with future devices.

Authors:
 [1]; ORCiD logo [1];  [1];  [2]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [1]; ORCiD logo [1]
  1. National Renewable Energy Lab. (NREL), Golden, CO (United States)
  2. Argonne National Lab. (ANL), Lemont, IL (United States)
  3. National Renewable Energy Lab. (NREL), Golden, CO (United States); Univ. of Colorado, Boulder, CO (United States)
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1659870
Report Number(s):
NREL/JA-5900-76373
Journal ID: ISSN 2380-8195; MainId:6939;UUID:d2954d8f-c167-ea11-9c31-ac162d87dfe5;MainAdminID:13539
Grant/Contract Number:  
AC36-08GO28308; AC02-06CH11357
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
ACS Energy Letters
Additional Journal Information:
Journal Volume: 5; Journal Issue: 6; Journal ID: ISSN 2380-8195
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
30 DIRECT ENERGY CONVERSION; cell architecture; electrochemical conversion; electroreduction

Citation Formats

Chen, Yingying, Vise, Ashlee, Klein, W. Ellis, Cetinbas, Firat C., Myers, Deborah J., Smith, Wilson A., Deutsch, Todd G., and Neyerlin, K. C. A Robust, Scalable Platform for the Electrochemical Conversion of CO2 to Formate: Identifying Pathways to Higher Energy Efficiencies. United States: N. p., 2020. Web. doi:10.1021/acsenergylett.0c00860.
Chen, Yingying, Vise, Ashlee, Klein, W. Ellis, Cetinbas, Firat C., Myers, Deborah J., Smith, Wilson A., Deutsch, Todd G., & Neyerlin, K. C. A Robust, Scalable Platform for the Electrochemical Conversion of CO2 to Formate: Identifying Pathways to Higher Energy Efficiencies. United States. https://doi.org/10.1021/acsenergylett.0c00860
Chen, Yingying, Vise, Ashlee, Klein, W. Ellis, Cetinbas, Firat C., Myers, Deborah J., Smith, Wilson A., Deutsch, Todd G., and Neyerlin, K. C. 2020. "A Robust, Scalable Platform for the Electrochemical Conversion of CO2 to Formate: Identifying Pathways to Higher Energy Efficiencies". United States. https://doi.org/10.1021/acsenergylett.0c00860. https://www.osti.gov/servlets/purl/1659870.
@article{osti_1659870,
title = {A Robust, Scalable Platform for the Electrochemical Conversion of CO2 to Formate: Identifying Pathways to Higher Energy Efficiencies},
author = {Chen, Yingying and Vise, Ashlee and Klein, W. Ellis and Cetinbas, Firat C. and Myers, Deborah J. and Smith, Wilson A. and Deutsch, Todd G. and Neyerlin, K. C.},
abstractNote = {This work demonstrated a robust, scalable cell architecture for electroreduction of CO2 (CO2R). An up to 90% faradaic efficiency for the conversion of CO2R to formate at 500 mA/cm2 was realized at a 25 cm2 gas diffusion electrode (GDE) with a carbon-supported SnO2 electrocatalyst. Furthermore, a 1.27 mm thick catholyte was used between the bipolar membrane and cathode GDE, which could be further reduced to tens of micrometers upon refinement. The deconvolution of the potential drop from each individual component/process guides the pathways to higher energy efficiencies of CO2R at this platform. Significant changes in the agglomerate size and aspect ratio on the electrode before and after an 11 h test were revealed by nano-CT, suggesting reduced CO2 accessibility from electrode degradation. The versatility of this CO2R testing platform enables the ability to assess materials, components, and interactions at scales more in line with future devices.},
doi = {10.1021/acsenergylett.0c00860},
url = {https://www.osti.gov/biblio/1659870}, journal = {ACS Energy Letters},
issn = {2380-8195},
number = 6,
volume = 5,
place = {United States},
year = {2020},
month = {5}
}

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