Elucidation of the Oxygen Reduction Volcano in Alkaline Media using a Copper-Platinum(111) Alloy

Kim Degn Jensen, Jakub Tymoczko, Jan Rossmeisl, Aliaksandr S. Bandarenka, Ib Chorkendorff, Maria Escudero Escribano, Ifan E. L. Stephens*

*Corresponding author for this work

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Abstract

The relationship between the binding of the reaction intermediates and oxygen reduction activity in alkaline media was experimentally explored. By introducing Cu into the 2nd surface layer of a Pt(111) single crystal, the surface reactivity was tuned. In both 0.1 m NaOH and 0.1 m KOH, the optimal catalyst should exhibit OH binding circa 0.1 eV weaker than Pt(111), via a Sabatier volcano; this observation suggests that the reaction is mediated via the same surface bound intermediates as in acid, in contrast to previous reports. In 0.1 m KOH, the alloy catalyst at the peak of the volcano exhibits a maximum activity of 101±8 mA cm2 at 0.9 V vs. a reversible hydrogen electrode (RHE). This activity constitutes a circa 60‐fold increase over Pt(111) in 0.1 m HClO4.
Original languageEnglish
JournalAngewandte Chemie
Volume130
Issue number11
Pages (from-to)2850-2855
Number of pages6
ISSN0044-8249
DOIs
Publication statusPublished - 2018

Keywords

  • Electroanalysis
  • Oxygen reduction
  • Platinum
  • Sabatier principle
  • Surface chemistry

Cite this

Jensen, K. D., Tymoczko, J., Rossmeisl, J., Bandarenka, A. S., Chorkendorff, I., Escribano, M. E., & Stephens, I. E. L. (2018). Elucidation of the Oxygen Reduction Volcano in Alkaline Media using a Copper-Platinum(111) Alloy. Angewandte Chemie, 130(11), 2850-2855. https://doi.org/10.1002/ange.201711858
Jensen, Kim Degn ; Tymoczko, Jakub ; Rossmeisl, Jan ; Bandarenka, Aliaksandr S. ; Chorkendorff, Ib ; Escribano, Maria Escudero ; Stephens, Ifan E. L. / Elucidation of the Oxygen Reduction Volcano in Alkaline Media using a Copper-Platinum(111) Alloy. In: Angewandte Chemie. 2018 ; Vol. 130, No. 11. pp. 2850-2855.
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title = "Elucidation of the Oxygen Reduction Volcano in Alkaline Media using a Copper-Platinum(111) Alloy",
abstract = "The relationship between the binding of the reaction intermediates and oxygen reduction activity in alkaline media was experimentally explored. By introducing Cu into the 2nd surface layer of a Pt(111) single crystal, the surface reactivity was tuned. In both 0.1 m NaOH and 0.1 m KOH, the optimal catalyst should exhibit OH binding circa 0.1 eV weaker than Pt(111), via a Sabatier volcano; this observation suggests that the reaction is mediated via the same surface bound intermediates as in acid, in contrast to previous reports. In 0.1 m KOH, the alloy catalyst at the peak of the volcano exhibits a maximum activity of 101±8 mA cm2 at 0.9 V vs. a reversible hydrogen electrode (RHE). This activity constitutes a circa 60‐fold increase over Pt(111) in 0.1 m HClO4.",
keywords = "Electroanalysis, Oxygen reduction, Platinum, Sabatier principle, Surface chemistry",
author = "Jensen, {Kim Degn} and Jakub Tymoczko and Jan Rossmeisl and Bandarenka, {Aliaksandr S.} and Ib Chorkendorff and Escribano, {Maria Escudero} and Stephens, {Ifan E. L.}",
year = "2018",
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Jensen, KD, Tymoczko, J, Rossmeisl, J, Bandarenka, AS, Chorkendorff, I, Escribano, ME & Stephens, IEL 2018, 'Elucidation of the Oxygen Reduction Volcano in Alkaline Media using a Copper-Platinum(111) Alloy', Angewandte Chemie, vol. 130, no. 11, pp. 2850-2855. https://doi.org/10.1002/ange.201711858

Elucidation of the Oxygen Reduction Volcano in Alkaline Media using a Copper-Platinum(111) Alloy. / Jensen, Kim Degn; Tymoczko, Jakub; Rossmeisl, Jan; Bandarenka, Aliaksandr S.; Chorkendorff, Ib; Escribano, Maria Escudero; Stephens, Ifan E. L.

In: Angewandte Chemie, Vol. 130, No. 11, 2018, p. 2850-2855.

Research output: Contribution to journalJournal articleResearchpeer-review

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T1 - Elucidation of the Oxygen Reduction Volcano in Alkaline Media using a Copper-Platinum(111) Alloy

AU - Jensen, Kim Degn

AU - Tymoczko, Jakub

AU - Rossmeisl, Jan

AU - Bandarenka, Aliaksandr S.

AU - Chorkendorff, Ib

AU - Escribano, Maria Escudero

AU - Stephens, Ifan E. L.

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AB - The relationship between the binding of the reaction intermediates and oxygen reduction activity in alkaline media was experimentally explored. By introducing Cu into the 2nd surface layer of a Pt(111) single crystal, the surface reactivity was tuned. In both 0.1 m NaOH and 0.1 m KOH, the optimal catalyst should exhibit OH binding circa 0.1 eV weaker than Pt(111), via a Sabatier volcano; this observation suggests that the reaction is mediated via the same surface bound intermediates as in acid, in contrast to previous reports. In 0.1 m KOH, the alloy catalyst at the peak of the volcano exhibits a maximum activity of 101±8 mA cm2 at 0.9 V vs. a reversible hydrogen electrode (RHE). This activity constitutes a circa 60‐fold increase over Pt(111) in 0.1 m HClO4.

KW - Electroanalysis

KW - Oxygen reduction

KW - Platinum

KW - Sabatier principle

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