Three-dimensional porous hollow fibre copper electrodes for efficient and high-rate electrochemical carbon dioxide reduction

Recep Kas, Khalid Khazzal Hummadi (), Ruud Kortlever, Patrick de Wit, Alexander Milbrat, Mieke W. J. Luiten-Olieman, Nieck E. Benes, Marc T. M. Koper and Guido Mul ()
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Recep Kas: PhotoCatalytic Synthesis Group, Faculty of Science and Technology, MESA+ Institute for Nanotechnology, University of Twente
Khalid Khazzal Hummadi: PhotoCatalytic Synthesis Group, Faculty of Science and Technology, MESA+ Institute for Nanotechnology, University of Twente
Ruud Kortlever: Leiden Institute of Chemistry, Leiden University
Patrick de Wit: Inorganic Membranes Group, Faculty of Science and Technology, MESA+ Institute for Nanotechnology, University of Twente
Alexander Milbrat: PhotoCatalytic Synthesis Group, Faculty of Science and Technology, MESA+ Institute for Nanotechnology, University of Twente
Mieke W. J. Luiten-Olieman: Inorganic Membranes Group, Faculty of Science and Technology, MESA+ Institute for Nanotechnology, University of Twente
Nieck E. Benes: Inorganic Membranes Group, Faculty of Science and Technology, MESA+ Institute for Nanotechnology, University of Twente
Marc T. M. Koper: Leiden Institute of Chemistry, Leiden University
Guido Mul: PhotoCatalytic Synthesis Group, Faculty of Science and Technology, MESA+ Institute for Nanotechnology, University of Twente

Nature Communications, 2016, vol. 7, issue 1, 1-7

Abstract: Abstract Aqueous-phase electrochemical reduction of carbon dioxide requires an active, earth-abundant electrocatalyst, as well as highly efficient mass transport. Here we report the design of a porous hollow fibre copper electrode with a compact three-dimensional geometry, which provides a large area, three-phase boundary for gas–liquid reactions. The performance of the copper electrode is significantly enhanced; at overpotentials between 200 and 400 mV, faradaic efficiencies for carbon dioxide reduction up to 85% are obtained. Moreover, the carbon monoxide formation rate is at least one order of magnitude larger when compared with state-of-the-art nanocrystalline copper electrodes. Copper hollow fibre electrodes can be prepared via a facile method that is compatible with existing large-scale production processes. The results of this study may inspire the development of new types of microtubular electrodes for electrochemical processes in which at least one gas-phase reactant is involved, such as in fuel cell technology.

Date: 2016
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DOI: 10.1038/ncomms10748

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