Strong activity changes observable during the first pretreatment cycles of trimetallic PtNiMo/C catalysts

Danisman, Bilal ; Zhang, Gui‐Rong ; Baumunk, Adrian F. ; Yang, Juntao ; Brummel, Olaf ; Darge, Philipp ; Mayrhofer, Karl J. J. ; Libuda, Jörg ; Ledendecker, Marc ; Etzold, Bastian J. M. (2023)
Strong activity changes observable during the first pretreatment cycles of trimetallic PtNiMo/C catalysts.
In: ChemElectroChem, 10 (16)
doi: 10.1002/celc.202300109
Artikel, Bibliographie

Dies ist die neueste Version dieses Eintrags.

Kurzbeschreibung (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.

Typ des Eintrags:

Artikel

Erschienen:

2023

Autor(en):

Danisman, Bilal ; Zhang, Gui‐Rong ; Baumunk, Adrian F. ; Yang, Juntao ; Brummel, Olaf ; Darge, Philipp ; Mayrhofer, Karl J. J. ; Libuda, Jörg ; Ledendecker, Marc ; Etzold, Bastian J. M.

Art des Eintrags:

Bibliographie

Titel:

Strong activity changes observable during the first pretreatment cycles of trimetallic PtNiMo/C catalysts

Sprache:

Englisch

Publikationsjahr:

2023

Ort:

Weinheim

Verlag:

Wiley-VCH

Titel der Zeitschrift, Zeitung oder Schriftenreihe:

ChemElectroChem

Jahrgang/Volume einer Zeitschrift:

(Heft-)Nummer:

Kollation:

11 Seiten

DOI:

10.1002/celc.202300109

Zugehörige Links:

TUprints Zweitveröffentlichung

Kurzbeschreibung (Abstract):

Alternatives oder übersetztes Abstract:

Alternatives Abstract	Sprache
An up to now unknown activity development is achieved during the pretreatment of alloyed trimetallic PtNiMo/C catalysts. In addition to the recording of steady state CVs under electrochemical cleaning cycles, insight into the unconditioned specific activity of the catalyst reveals a sharp increase during the first five to eight cycles and a further decrease at higher cycle numbers.	Englisch

Freie Schlagworte:

Alloyed Catalyst, Cyclic voltammetry, Electrochemistry, Oxygen Reduction, Pretreatment, Rotating Disk Electrode

ID-Nummer:

Artikel-ID: e202300109

Sachgruppe der Dewey Dezimalklassifikatin (DDC):

500 Naturwissenschaften und Mathematik > 540 Chemie
600 Technik, Medizin, angewandte Wissenschaften > 660 Technische Chemie

Fachbereich(e)/-gebiet(e):

07 Fachbereich Chemie
07 Fachbereich Chemie > Ernst-Berl-Institut
07 Fachbereich Chemie > Ernst-Berl-Institut > Fachgebiet Technische Chemie
07 Fachbereich Chemie > Ernst-Berl-Institut > Fachgebiet Technische Chemie > Technische Chemie I

Hinterlegungsdatum:

12 Feb 2024 07:27

Letzte Änderung:

12 Feb 2024 09:34