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Selective electrochemical reduction of carbon dioxide to ethanol via a relay catalytic platform
Efficient electroreduction of carbon dioxide (CO(2)) to ethanol is of great importance, but remains a challenge because it involves the transfer of multiple proton–electron pairs and carbon–carbon coupling. Herein, we report a CoO-anchored N-doped carbon material composed of mesoporous carbon (MC) a...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society of Chemistry
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8159220/ https://www.ncbi.nlm.nih.gov/pubmed/34122967 http://dx.doi.org/10.1039/d0sc01133a |
Sumario: | Efficient electroreduction of carbon dioxide (CO(2)) to ethanol is of great importance, but remains a challenge because it involves the transfer of multiple proton–electron pairs and carbon–carbon coupling. Herein, we report a CoO-anchored N-doped carbon material composed of mesoporous carbon (MC) and carbon nanotubes (CNT) as a catalyst for CO(2) electroreduction. The faradaic efficiencies of ethanol and current density reached 60.1% and 5.1 mA cm(−2), respectively. Moreover, the selectivity for ethanol products was extremely high among the products produced from CO(2). A proposed mechanism is discussed in which the MC–CNT/Co catalyst provides a relay catalytic platform, where CoO catalyzes the formation of CO* intermediates which spill over to MC–CNT for carbon–carbon coupling to form ethanol. The high selectivity for ethanol is attributed mainly to the highly selective carbon–carbon coupling active sites on MC–CNT. |
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