at Google ScholarTitle data
Schneider, Peter M. ; Kollmannsberger, Kathrin L. ; Cesari, Cristiana ; Khare, Rachit ; Boniface, Maxime ; Roldán Cuenya, Beatriz ; Lunkenbein, Thomas ; Elsner, Martin ; Zacchini, Stefano ; Bandarenka, Aliaksandr S. ; Warnan, Julien ; Fischer, Roland A.:
Engineering ORR Electrocatalysts from Co₈Pt₄ Carbonyl Clusters via ZIF-8 Templating.
In: ChemElectroChem.
Vol. 11
(2024)
Issue 5
.
- e202300476.
ISSN 2196-0216
DOI: https://doi.org/10.1002/celc.202300476
Abstract in another language
To reduce the costs of proton exchange membrane fuel cells, the amount of Pt necessary to drive efficient oxygen reduction reaction (ORR) should be minimized. Particle nanostructuring, (nano-)alloying, and metal-doping can yield higher activities per Pt mass through tailoring catalysts owning a high number of active sites and precise electronic properties. In this work, the atom-precise [NBnMe3]2[Co8Pt4C2(CO)(24)] (Co8Pt4) cluster is encapsulated and activated in a zeolitic imidazolate framework (ZIF)-8, which unlocks the access to defined, bare Pt-Co nanoclusters, Co8 +/- xPt4 +/- yNC@ZIF-8, for the fabrication of highly active ORR catalysts. Upon controlled C-interfacing and ZIF-8-digestion, Co-doped Pt NPs (Pt27Co1) with a homogenous and narrow size distribution of (1.1 +/- 0.4) nm are produced on Vulcan (R) carbon. Restructuring of the Pt27Co1/C catalyst throughout the ORR measurement was monitored via high-angle annular dark field-scanning transmission electron microscopy and X-ray photoelectron spectroscopy. The measured ORR mass activity of (0.42 +/- 0.07) A mgPt(-1) and the specific activity of (0.67 +/- 0.06) mA cm(ECSA)(-2) compare favourably with the catalyst obtained by direct C-interfacing the pristine Co8Pt4 cluster and with state-of-the-art Pt/C reference catalysts. Our results demonstrate the potential of ZIF-8-mediated Pt-Co NP synthesis toward devising ORR catalysts with high Pt-mass activity.
Further data
| Item Type: | Article in a journal |
|---|---|
| Refereed: | Yes |
| Additional notes: | WOS:001158847100001 |
| Institutions of the University: | Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry Faculties Faculties > Faculty of Biology, Chemistry and Earth Sciences Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Operando-Analytics of Electrochemical Energy Storage > Chair Operando-Analytics of Electrochemical Energy Storage - Univ.-Prof. Dr. Thomas Lunkenbein Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Operando-Analytics of Electrochemical Energy Storage |
| Result of work at the UBT: | No |
| DDC Subjects: | 500 Science > 540 Chemistry |
| Date Deposited: | 12 Jun 2025 09:27 |
| Last Modified: | 04 Jul 2025 11:31 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/93662 |