Han, Lihao and Zhou, Wuzong 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. doi:10.1021/acsenergylett.8b00164. https://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).
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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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Issue or Number: | 4 | ||||||||||||
DOI: | 10.1021/acsenergylett.8b00164 | ||||||||||||
Record Number: | CaltechAUTHORS:20180314-101126488 | ||||||||||||
Persistent URL: | https://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: | 15 Nov 2021 20:27 |
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