Kinetic Isotope Effect as a Tool To Investigate the Oxygen Reduction Reaction on Pt-based Electrocatalysts - Part II : Effect of Platinum Dispersion
© 2020 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim..
We investigated the oxygen reduction reaction (ORR) mechanism on Pt nanoparticles (NPs) dispersed on several carbon blacks with various physicochemical properties (i. e. specific surface ranging from 80 to 900 m2 g-1 , different graphitization degree, etc.). Using the kinetic isotope effect (KIE) along with various electrochemical characterizations, we determined that the rate determining step (RDS) of the ORR is a proton-independent step when the density of Pt NPs on the surface of the carbon support is high. Upon decrease of the density of Pt NPs on the surface, the RDS of the ORR starts involving a proton, as denoted by an increase of the KIE >1. This underlined the critical role played by the carbon support in the oxygen reduction reaction electrocatalysis by Pt supported on high surface area carbon.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2020 |
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| Erschienen: |
2020 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:21 |
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| Enthalten in: |
Chemphyschem : a European journal of chemical physics and physical chemistry - 21(2020), 12 vom: 16. Juni, Seite 1331-1339 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Rezaei Talarposhti, Morteza [VerfasserIn] |
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| Links: |
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| Themen: |
Carbon support |
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| Anmerkungen: |
Date Revised 17.06.2020 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
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| doi: |
10.1002/cphc.201901092 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM309219043 |
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| 500 | |a published: Print-Electronic | ||
| 500 | |a Citation Status PubMed-not-MEDLINE | ||
| 520 | |a © 2020 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. | ||
| 520 | |a We investigated the oxygen reduction reaction (ORR) mechanism on Pt nanoparticles (NPs) dispersed on several carbon blacks with various physicochemical properties (i. e. specific surface ranging from 80 to 900 m2 g-1 , different graphitization degree, etc.). Using the kinetic isotope effect (KIE) along with various electrochemical characterizations, we determined that the rate determining step (RDS) of the ORR is a proton-independent step when the density of Pt NPs on the surface of the carbon support is high. Upon decrease of the density of Pt NPs on the surface, the RDS of the ORR starts involving a proton, as denoted by an increase of the KIE >1. This underlined the critical role played by the carbon support in the oxygen reduction reaction electrocatalysis by Pt supported on high surface area carbon | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Pt-based catalyst | |
| 650 | 4 | |a carbon support | |
| 650 | 4 | |a electrochemistry | |
| 650 | 4 | |a kinetic isotope effect | |
| 650 | 4 | |a oxygen reduction reaction | |
| 700 | 1 | |a Asset, Tristan |e verfasserin |4 aut | |
| 700 | 1 | |a Garcia, Samuel T |e verfasserin |4 aut | |
| 700 | 1 | |a Chen, Yechuan |e verfasserin |4 aut | |
| 700 | 1 | |a Herrera, Sergio |e verfasserin |4 aut | |
| 700 | 1 | |a Dai, Sheng |e verfasserin |4 aut | |
| 700 | 1 | |a Peterson, Eric J |e verfasserin |4 aut | |
| 700 | 1 | |a Artyushkova, Kateryna |e verfasserin |4 aut | |
| 700 | 1 | |a Zenyuk, Iryna |e verfasserin |4 aut | |
| 700 | 1 | |a Atanassov, Plamen |e verfasserin |4 aut | |
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