A nitrogen-doped carbon catalyst for electrochemical CO2 conversion to CO with high selectivity and current density

Jhong, Huei Ru Molly and Tornow, Claire E. and Smid, Bretislav and Gewirth, Andrew A. and Lyth, Stephen M. and Kenis, Paul J.A. (2017) A nitrogen-doped carbon catalyst for electrochemical CO2 conversion to CO with high selectivity and current density. ChemSusChem, 10 (6). pp. 1094-1099. ISSN 1864-564X (https://doi.org/10.1002/cssc.201600843)

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Abstract

We report characterization of a non-precious metal-free catalyst for the electrochemical reduction of CO2 to CO; namely, a pyrolyzed carbon nitride and multiwall carbon nanotube composite. This catalyst exhibits a high selectivity for production of CO over H2 (approximately 98 % CO and 2 % H2), as well as high activity in an electrochemical flow cell. The CO partial current density at intermediate cathode potentials (V=−1.46 V vs. Ag/AgCl) is up to 3.5× higher than state-of-the-art Ag nanoparticle-based catalysts, and the maximum current density is 90 mA cm−2. The mass activity and energy efficiency (up to 48 %) were also higher than the Ag nanoparticle reference. Moving away from precious metal catalysts without sacrificing activity or selectivity may significantly enhance the prospects of electrochemical CO2 reduction as an approach to reduce atmospheric CO2 emissions or as a method for load-leveling in relation to the use of intermittent renewable energy sources.

  • Item type:Article
    ID code:85388
    Dates:
    Date
    Event
    22 March 2017
    Published
    28 October 2016
    Published Online
    23 September 2016
    Accepted
    24 June 2016
    Submitted
    Notes:Funding Information: We gratefully acknowledge financial support from the Department of Energy (DE-FG02005ER46260), the Department of Energy through an STTR grant to Dioxide Materials and UIUC (DE-SC0004453), and the National Science Foundation (CTS 05-47617). The International Institute of Carbon Neutral Energy Research (WPI-I2CNER), sponsored by the World Premier International Research Center Initiative (WPI), MEXT, Japan. The authors are grateful for support from the Progress 100 program of Kyushu University, supported by MEXT, Japan. We also acknowledge Yohan Kim for assistance in electrochemical testing, Richard Haasch, from the Frederick Seitz Materials Research Laboratory Central Facilities for assistance with XPS, Scott Robinson from the Beckman Institute for assistance with SEM imaging, and Steven R Caliari, Sumit Verma, and Byoungsu Kim for stimulating discussions. Publisher Copyright: © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim H.-R. M. Jhong, C. E. Tornow, B. Smid, A. A. Gewirth, S. M. Lyth, P. J. A. Kenis, ChemSusChem 2017, 10, 1094. https://doi.org/10.1002/cssc.201600843
    Subjects:Science > Chemistry
    Department:Faculty of Engineering > Chemical and Process Engineering
    Depositing user: Pure Administrator
    Date deposited:04 May 2023 10:02
    Last modified:25 Apr 2024 01:33
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/85388
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