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Tailoring gas-phase CO 2 electroreduction selectivity to hydrocarbons at Cu nanoparticles
Open accessAbstract
Copper-based surfaces appear as the most active catalysts for CO 2 electroreduction to hydrocarbons, even though formation rates and efficiencies still need to be improved. The aim of the present work is to evaluate the continuous gas-phase CO 2 electroreduction to hydrocarbons (i.e. ethylene and methane) at copper nanoparticulated-based surfaces, paying attention to particle size influence (ranging from 25–80 nm) on reaction productivity, selectivity, and Faraday efficiency (FE) for CO 2 conversion. The effect of the current density and the presence of a microporous layer within the working electrode are then evaluated. Copper-based gas diffusion electrodes are prepared by airbrushing the catalytic ink onto carbon supports, which are then coupled to a cation exchange membrane (Nafion) in a membrane electrode assembly. The results show that the use of smaller copper nanoparticles (25 nm) leads to a higher ethylene production (1148 μ mol m −2 s −1 ) with a remarkable high FE (92.8%), at the same time, diminishing the competitive hydrogen evolution reaction in terms of FE. This work demonstrates the importance of nanoparticle size on reaction selectivity, which may be of help to design enhanced electrocatalytic materials for CO 2 valorization to hydrocarbons.
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“BPMs solve the problem of pH gradient development in monopolar membrane systems, which can result in voltage fluctuations and instability over time, by maintaining a constant pH in each side of the cell.[170]”
From Electrochemical CO 2 Reduction into Chemical Feedstocks: From Mechanistic Electrocatalysis Models to System Design (2019) · cites this paper as [170]
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Metadata
- Authors
- Merino-Garcia, I., Albo, J., & Irabien, A.
- Affiliations
- Universidad de Cantabria (ES)
- Venue
- Nanotechnology
- Publisher
- IOP Publishing
- Published
- 2017-11-29
- Volume
- 29
- Issue
- 1
- Pages
- 014001
- ISSN
- 0957-4484 (ISSN-L)
- 1361-6528
- OpenAlex
- W2767391993
- Cited by
- 129
- References
- 66
- Citations by year
- 2026: 3 · 2025: 14 · 2024: 18 · 2023: 17 · 2022: 18 · 2021: 17 · 2020: 15 · 2019: 17 · 2018: 10
- FWCI
- 3.07
- Type
- journal article
- Language
- en
- Open access
- green
- hdl.handle.net
- Licence
- Locations
- Nanotechnology (publishedVersion)
- PubMed (publishedVersion)
- LA Referencia (Red Federada de Repositorios Institucionales de Publicaciones Científicas) (submittedVersion)
- UCrea (University of Cantabria) (submittedVersion, cc-by)
- Funders
- Secretaría de Estado de Investigación, Desarrollo e Innovación (BES-2014-070081)
- Topics
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › CO2 Reduction Techniques and Catalysts
- Physical Sciences › Chemical Engineering › Catalysis › Catalysts for Methane Reforming
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
- Keywords
- electrochemical CO2 reduction, copper nanoparticles, ethylene production, methane production, particle size effects, reaction selectivity, Faradaic efficiency, hydrogen evolution suppression, gas diffusion electrode, membrane electrode assembly, microporous layer, current density, CO2 utilization
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