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Influence of Cations on HCOOH and CO Formation during CO(2) Reduction on a Pd(ML)Pt(111) Electrode

[Image: see text] Understanding the role of cations in the electrochemical CO(2) reduction (CO(2)RR) process is of fundamental importance for practical application. In this work, we investigate how cations influence HCOOH and CO formation on Pd(ML)Pt(111) in pH 3 electrolytes. While only (a small am...

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Autores principales: Ye, Chunmiao, Dattila, Federico, Chen, Xiaoting, López, Núria, Koper, Marc T. M.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2023
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10510319/
https://www.ncbi.nlm.nih.gov/pubmed/37651736
http://dx.doi.org/10.1021/jacs.3c03786
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author Ye, Chunmiao
Dattila, Federico
Chen, Xiaoting
López, Núria
Koper, Marc T. M.
author_facet Ye, Chunmiao
Dattila, Federico
Chen, Xiaoting
López, Núria
Koper, Marc T. M.
author_sort Ye, Chunmiao
collection PubMed
description [Image: see text] Understanding the role of cations in the electrochemical CO(2) reduction (CO(2)RR) process is of fundamental importance for practical application. In this work, we investigate how cations influence HCOOH and CO formation on Pd(ML)Pt(111) in pH 3 electrolytes. While only (a small amount of adsorbed) CO forms on Pd(ML)Pt(111) in the absence of metal cations, the onset potential of HCOOH and CO decreases with increasing cation concentrations. The cation effect is stronger on HCOOH formation than that on CO formation on Pd(ML)Pt(111). Density functional theory simulations indicate that cations facilitate both hydride formation and CO(2) activation by polarizing the electronic density at the surface and stabilizing *CO(2)(–). Although the upshift of the metal work function caused by high coverage of adsorbates limits hydride formation, the cation-induced electric field counterbalances this effect in the case of *H species, sustaining HCOOH production at mild negative potentials. Instead, at the high *CO coverages observed at very negative potentials, surface hydrides do not form, preventing the HCOOH route both in the absence and presence of cations. Our results open the way for a consistent evaluation of cationic electrolyte effects on both activity and selectivity in CO(2)RR on Pd–Pt catalysts.
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spelling pubmed-105103192023-09-21 Influence of Cations on HCOOH and CO Formation during CO(2) Reduction on a Pd(ML)Pt(111) Electrode Ye, Chunmiao Dattila, Federico Chen, Xiaoting López, Núria Koper, Marc T. M. J Am Chem Soc [Image: see text] Understanding the role of cations in the electrochemical CO(2) reduction (CO(2)RR) process is of fundamental importance for practical application. In this work, we investigate how cations influence HCOOH and CO formation on Pd(ML)Pt(111) in pH 3 electrolytes. While only (a small amount of adsorbed) CO forms on Pd(ML)Pt(111) in the absence of metal cations, the onset potential of HCOOH and CO decreases with increasing cation concentrations. The cation effect is stronger on HCOOH formation than that on CO formation on Pd(ML)Pt(111). Density functional theory simulations indicate that cations facilitate both hydride formation and CO(2) activation by polarizing the electronic density at the surface and stabilizing *CO(2)(–). Although the upshift of the metal work function caused by high coverage of adsorbates limits hydride formation, the cation-induced electric field counterbalances this effect in the case of *H species, sustaining HCOOH production at mild negative potentials. Instead, at the high *CO coverages observed at very negative potentials, surface hydrides do not form, preventing the HCOOH route both in the absence and presence of cations. Our results open the way for a consistent evaluation of cationic electrolyte effects on both activity and selectivity in CO(2)RR on Pd–Pt catalysts. American Chemical Society 2023-08-31 /pmc/articles/PMC10510319/ /pubmed/37651736 http://dx.doi.org/10.1021/jacs.3c03786 Text en © 2023 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by/4.0/Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Ye, Chunmiao
Dattila, Federico
Chen, Xiaoting
López, Núria
Koper, Marc T. M.
Influence of Cations on HCOOH and CO Formation during CO(2) Reduction on a Pd(ML)Pt(111) Electrode
title Influence of Cations on HCOOH and CO Formation during CO(2) Reduction on a Pd(ML)Pt(111) Electrode
title_full Influence of Cations on HCOOH and CO Formation during CO(2) Reduction on a Pd(ML)Pt(111) Electrode
title_fullStr Influence of Cations on HCOOH and CO Formation during CO(2) Reduction on a Pd(ML)Pt(111) Electrode
title_full_unstemmed Influence of Cations on HCOOH and CO Formation during CO(2) Reduction on a Pd(ML)Pt(111) Electrode
title_short Influence of Cations on HCOOH and CO Formation during CO(2) Reduction on a Pd(ML)Pt(111) Electrode
title_sort influence of cations on hcooh and co formation during co(2) reduction on a pd(ml)pt(111) electrode
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10510319/
https://www.ncbi.nlm.nih.gov/pubmed/37651736
http://dx.doi.org/10.1021/jacs.3c03786
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