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Data Acquisition Protocols and Reporting Standards for Studies of the Electrochemical Reduction of Carbon Dioxide

Clark, Ezra L. and Resasco, Joaquin and Landers, Alan and Lin, John and Chung, Linh-Thao and Walton, Amber and Hahn, Christopher and Jaramillo, Thomas F. and Bell, Alexis T. (2018) Data Acquisition Protocols and Reporting Standards for Studies of the Electrochemical Reduction of Carbon Dioxide. ACS Catalysis, 8 (7). pp. 6560-6570. ISSN 2155-5435. doi:10.1021/acscatal.8b01340.

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Objective evaluation of the performance of electrocatalysts for CO_2 reduction has been complicated by a lack of standardized methods for measuring and reporting activity data. In this perspective, we advocate that standardizing these practices can aid in advancing research efforts toward the development of efficient and selective CO_2 reduction electrocatalysts. Using information taken from experimental studies, we identify variables that influence the measured activity of CO_2 reduction electrocatalysts and propose procedures to account for these variables in order to improve the accuracy and reproducibility of reported data. We recommend that catalysts be measured under conditions which do not introduce artifacts from impurities, from either the electrolyte or counter electrode, and advocate the acquisition of data measured in the absence of mass transport effects. Furthermore, measured rates of electrochemical reactions should be normalized to both the geometric electrode area as well as the electrochemically active surface area to facilitate the comparison of reported catalysts with those previously known. We demonstrate that, when these factors are accounted for, the CO_2 reduction activities of Ag and Cu measured in different laboratories exhibit little difference. Adoption of the recommendations presented in this perspective would greatly facilitate the identification of superior catalysts for CO_2 reduction arising solely from changes in their composition and pretreatment.

Item Type:Article
Related URLs:
URLURL TypeDescription Information
Hahn, Christopher0000-0002-2772-6341
Jaramillo, Thomas F.0000-0001-9900-0622
Bell, Alexis T.0000-0002-5738-4645
Additional Information:© 2018 American Chemical Society. Received: April 5, 2018; Revised: May 30, 2018; Published: June 1, 2018. This material is based upon work performed by the Joint Center for Artificial Photosynthesis, a DOE Energy Innovation Hub, supported through the Office of Science of the U.S. Department of Energy under Award Number DE-SC0004993. E.L.C. and J.R. were supported by the National Science Foundation (NSF). Author Contributions: E.L.C. and J.R. contributed equally. The authors declare no competing financial interest.
Funding AgencyGrant Number
Joint Center for Artificial Photosynthesis (JCAP)UNSPECIFIED
Department of Energy (DOE)DE-SC0004993
Subject Keywords:Electrocatalysis, CO2 reduction, experimental protocols, catalyst benchmarking, mass transfer effects, surface contamination, surface area normalization, intrinsic activity metrics
Issue or Number:7
Record Number:CaltechAUTHORS:20180604-132638553
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Official Citation:Standards and Protocols for Data Acquisition and Reporting for Studies of the Electrochemical Reduction of Carbon Dioxide. Ezra L. Clark, Joaquin Resasco, Alan Landers, John Lin, Linh-Thao Chung, Amber Walton, Christopher Hahn, Thomas F. Jaramillo, and Alexis T. Bell. ACS Catalysis 2018 8 (7), 6560-6570. DOI: 10.1021/acscatal.8b01340
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:86790
Deposited By: Tony Diaz
Deposited On:04 Jun 2018 20:58
Last Modified:15 Nov 2021 20:42

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