Water-Mediated ElectroHydrogenation of CO2 at Near-Equilibrium Potential by Carbon Nanotubes/Cerium Dioxide Nanohybrids
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Water-Mediated ElectroHydrogenation of CO2 at Near-Equilibrium Potential by Carbon Nanotubes/Cerium Dioxide NanohybridsAutor(es)
Fecha
2020-08-19Cita bibliográfica
ACS Appl. Energy Mater. 2020, 3, 9, 8509–8518
Resumen
[Abstract]: The combination of multiwalled carbon nanotubes (MWCNTs) with undoped CeO2 na-noparticles (NPs) is effective for the direct electrocatalytic reduction of CO2 to formic acid (FA) at acidic pH (0.1 M HNO3), at overpotential as low as η = −0.02 V (vs RHE) with Faradic efficiency (FE) up to 65%. Exsitu and operando evidence identifies nons-toichiometric Ce4+/3+O2–x reduced sites as essential for the selective CO2 reduction reac-tion (CO2RR). The MWCNT-mediated electrochemical reduction of the CeO2 NPs of-fers a definite advantage with respect to the generally adopted thermochemical cycles (800–1500 °C) or deep hydrogenation pretreatments, thus presenting an interesting perspective for the engineering of CeO2 electrocatalysts.
Palabras clave
Carbon nanotubes
Cerium oxide
Carbon dioxide reduction
Electrocatalytic hydrogenation
Metal oxide electrocatalysts
Cerium oxide
Carbon dioxide reduction
Electrocatalytic hydrogenation
Metal oxide electrocatalysts
Versión del editor
Derechos
Copyright © 2020 American Chemical Society. This is an open access article published under an ACS AuthorChoice License (https://pubs.acs.org/page/policy/authorchoice_termsofuse.html), which permits copying and redistribution of the article or any adaptations for non-commercial purposes.
ISSN
2574-0962 (eISSN)