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High Rate Electrochemical Reduction of Carbon Monoxide to Ethylene using Cu-Nanoparticle-Based Gas Diffusion Electrodes

Han, Lihao and Zhou, Wu and Xiang, Chengxiang (2018) High Rate Electrochemical Reduction of Carbon Monoxide to Ethylene using Cu-Nanoparticle-Based Gas Diffusion Electrodes. ACS Energy Letters, 3 (4). pp. 855-860. ISSN 2380-8195. http://resolver.caltech.edu/CaltechAUTHORS:20180314-101126488

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Abstract

Gas diffusion electrodes (GDEs) with high electrochemically active surface areas (ECSAs) and triple-phase boundaries for efficient gas, electron, and ion transport offer a unique opportunity for high-rate electrochemical CO reduction (COR) in relative to traditional aqueous configurations. Cu-nanoparticle-based GDEs were fabricated by applying a mixture of carbon powders, copper acetate aqueous solution, and Teflon onto a Cu gauze substrate. The catalyst-coated substrate was air-dried, mechanically pressed, and subsequently annealed under forming gas to produce GDEs. Two distinctive types of GDE configurations, a flow-through configuration and a flow-by configuration, were constructed, characterized, and tested to quantitatively evaluate the effects of reactant gas transport on the activity and the selectivity of the GDE materials for COR. In the flow-through configuration, a high partial current density of 50.8 mA cm^(–2) for COR to C_2H_4 was achieved at −0.85 V vs RHE in 10 M KOH at −15 °C, while in the flow-by configuration with the same catalyst materials the partial current density for C_2H_4 generation was limited to <1 mA cm^(–2).


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1021/acsenergylett.8b00164DOIArticle
https://pubs.acs.org/doi/10.1021/acsenergylett.8b00164PublisherArticle
https://pubs.acs.org/doi/suppl/10.1021/acsenergylett.8b00164PublisherSupporting Information
ORCID:
AuthorORCID
Han, Lihao0000-0002-0452-3381
Additional Information:© 2018 American Chemical Society. Received: January 31, 2018; Accepted: March 13, 2018; Published: March 13, 2018. This material is based on 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. The authors also acknowledge experimental assistance from Xinghao Zhou, Dr. Hsiang-Yun Chen, Dr. Yungchieh Lai, and Dr. Bruce S. Brunschwig. The authors declare no competing financial interest.
Group:JCAP
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Funding AgencyGrant Number
Department of Energy (DOE)DE-SC0004993
Record Number:CaltechAUTHORS:20180314-101126488
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20180314-101126488
Official Citation:High-Rate Electrochemical Reduction of Carbon Monoxide to Ethylene Using Cu-Nanoparticle-Based Gas Diffusion Electrodes. Lihao Han, Wu Zhou, and Chengxiang Xiang. ACS Energy Letters 2018 3 (4), 855-860. DOI: 10.1021/acsenergylett.8b00164
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:85303
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:15 Mar 2018 03:32
Last Modified:25 Apr 2018 21:42

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