Strong Activity Changes Observable during the First Pretreatment Cycles of Trimetallic PtNiMo/C Catalysts
Abstract Pt‐based alloy catalysts supported on carbon are commonly characterized for oxygen reduction reaction (ORR) activity using the rotating disk electrode technique (RDE). Within this study, we show exemplarily for PtNiMo/C catalysts that the applied pretreatment influences strongly the determi...
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| Format: | Article |
| Language: | English |
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Wiley-VCH
2023-08-01
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| Series: | ChemElectroChem |
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| Online Access: | https://doi.org/10.1002/celc.202300109 |
| _version_ | 1797741058203844608 |
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| author | Bilal Danisman Prof. Dr. Gui‐Rong Zhang Adrian F. Baumunk Juntao Yang Dr. Olaf Brummel Philipp Darge Prof. Dr. Karl J. J. Mayrhofer Prof. Dr. Jörg Libuda Prof. Dr. Marc Ledendecker Prof. Dr.‐Ing. Bastian J. M. Etzold |
| author_facet | Bilal Danisman Prof. Dr. Gui‐Rong Zhang Adrian F. Baumunk Juntao Yang Dr. Olaf Brummel Philipp Darge Prof. Dr. Karl J. J. Mayrhofer Prof. Dr. Jörg Libuda Prof. Dr. Marc Ledendecker Prof. Dr.‐Ing. Bastian J. M. Etzold |
| author_sort | Bilal Danisman |
| collection | DOAJ |
| description | Abstract Pt‐based alloy catalysts supported on carbon are commonly characterized for oxygen reduction reaction (ORR) activity using the rotating disk electrode technique (RDE). Within this study, we show exemplarily for PtNiMo/C catalysts that the applied pretreatment influences strongly the determined activity. The classically employed descriptor of unchanged cyclic voltammetry response is insufficient to portrait completed surface restructuring, and gives an incorrect impression that stable activity can be determined. This might be one of the reasons for the strongly deviating activities reported in literature. Following the changes in activity during pretreatment also with in‐situ FTIR and online dissolution measurements gives insights to an up to now largely overseen high activity of the trimetallic catalysts. A maximum activity of 0.57 mA cmPt−2 at 0.95 VRHE is reached quickly during the first six cycles and decreases slowly subsequently. The maximum activity and change of activity over the cycle number is affected by the scan rate and electrolyte refreshing, while the gas atmosphere plays only a minor role. This exemplary study might be important for Pt alloy catalysts in general. |
| first_indexed | 2024-03-12T14:21:24Z |
| format | Article |
| id | doaj.art-60c7c589052942c18c6643f44e629d53 |
| institution | Directory Open Access Journal |
| issn | 2196-0216 |
| language | English |
| last_indexed | 2024-03-12T14:21:24Z |
| publishDate | 2023-08-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | ChemElectroChem |
| spelling | doaj.art-60c7c589052942c18c6643f44e629d532023-08-19T01:36:40ZengWiley-VCHChemElectroChem2196-02162023-08-011016n/an/a10.1002/celc.202300109Strong Activity Changes Observable during the First Pretreatment Cycles of Trimetallic PtNiMo/C CatalystsBilal Danisman0Prof. Dr. Gui‐Rong Zhang1Adrian F. Baumunk2Juntao Yang3Dr. Olaf Brummel4Philipp Darge5Prof. Dr. Karl J. J. Mayrhofer6Prof. Dr. Jörg Libuda7Prof. Dr. Marc Ledendecker8Prof. Dr.‐Ing. Bastian J. M. Etzold9Department of Chemistry Ernst-Berl-Institute for Technical and Macromolecular Chemistry Technical University of Darmstadt 64287 Darmstadt GermanyDepartment of Chemistry Ernst-Berl-Institute for Technical and Macromolecular Chemistry Technical University of Darmstadt 64287 Darmstadt GermanyDepartment of Chemistry Ernst-Berl-Institute for Technical and Macromolecular Chemistry Technical University of Darmstadt 64287 Darmstadt GermanyErlangen Center for Interface Research and Catalysis FAU Erlangen-Nürnberg Egerlandstr. 3 91058 Erlangen GermanyErlangen Center for Interface Research and Catalysis FAU Erlangen-Nürnberg Egerlandstr. 3 91058 Erlangen GermanyForschungszentrum Jülich GmbH Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy (IEK-11) Cauerstr. 1 91058 Erlangen GermanyForschungszentrum Jülich GmbH Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy (IEK-11) Cauerstr. 1 91058 Erlangen GermanyErlangen Center for Interface Research and Catalysis FAU Erlangen-Nürnberg Egerlandstr. 3 91058 Erlangen GermanyDepartment of Chemistry Ernst-Berl-Institute for Technical and Macromolecular Chemistry Technical University of Darmstadt 64287 Darmstadt GermanyDepartment of Chemistry Ernst-Berl-Institute for Technical and Macromolecular Chemistry Technical University of Darmstadt 64287 Darmstadt GermanyAbstract Pt‐based alloy catalysts supported on carbon are commonly characterized for oxygen reduction reaction (ORR) activity using the rotating disk electrode technique (RDE). Within this study, we show exemplarily for PtNiMo/C catalysts that the applied pretreatment influences strongly the determined activity. The classically employed descriptor of unchanged cyclic voltammetry response is insufficient to portrait completed surface restructuring, and gives an incorrect impression that stable activity can be determined. This might be one of the reasons for the strongly deviating activities reported in literature. Following the changes in activity during pretreatment also with in‐situ FTIR and online dissolution measurements gives insights to an up to now largely overseen high activity of the trimetallic catalysts. A maximum activity of 0.57 mA cmPt−2 at 0.95 VRHE is reached quickly during the first six cycles and decreases slowly subsequently. The maximum activity and change of activity over the cycle number is affected by the scan rate and electrolyte refreshing, while the gas atmosphere plays only a minor role. This exemplary study might be important for Pt alloy catalysts in general.https://doi.org/10.1002/celc.202300109Alloyed CatalystCyclic voltammetryElectrochemistryOxygen ReductionPretreatmentRotating Disk Electrode |
| spellingShingle | Bilal Danisman Prof. Dr. Gui‐Rong Zhang Adrian F. Baumunk Juntao Yang Dr. Olaf Brummel Philipp Darge Prof. Dr. Karl J. J. Mayrhofer Prof. Dr. Jörg Libuda Prof. Dr. Marc Ledendecker Prof. Dr.‐Ing. Bastian J. M. Etzold Strong Activity Changes Observable during the First Pretreatment Cycles of Trimetallic PtNiMo/C Catalysts ChemElectroChem Alloyed Catalyst Cyclic voltammetry Electrochemistry Oxygen Reduction Pretreatment Rotating Disk Electrode |
| title | Strong Activity Changes Observable during the First Pretreatment Cycles of Trimetallic PtNiMo/C Catalysts |
| title_full | Strong Activity Changes Observable during the First Pretreatment Cycles of Trimetallic PtNiMo/C Catalysts |
| title_fullStr | Strong Activity Changes Observable during the First Pretreatment Cycles of Trimetallic PtNiMo/C Catalysts |
| title_full_unstemmed | Strong Activity Changes Observable during the First Pretreatment Cycles of Trimetallic PtNiMo/C Catalysts |
| title_short | Strong Activity Changes Observable during the First Pretreatment Cycles of Trimetallic PtNiMo/C Catalysts |
| title_sort | strong activity changes observable during the first pretreatment cycles of trimetallic ptnimo c catalysts |
| topic | Alloyed Catalyst Cyclic voltammetry Electrochemistry Oxygen Reduction Pretreatment Rotating Disk Electrode |
| url | https://doi.org/10.1002/celc.202300109 |
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