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Haase, Felix T. ; Ortega, Eduardo ; Saddeler, Sascha ; Schmidt, Franz-Philipp ; Cruz, Daniel ; Scholten, Fabian ; Rüscher, Martina ; Martini, Andrea ; Jeon, Hyo Sang ; Herzog, Antonia ; Hejral, Uta ; Davis, Earl M. ; Timoshenko, Janis ; Knop-Gericke, Axel ; Lunkenbein, Thomas ; Schulz, Stephan ; Bergmann, Arno ; Roldán Cuenya, Beatriz:
Role of Fe decoration on the oxygen evolving state of Co₃O₄ nanocatalysts.
In: Energy & Environmental Science.
Bd. 17
(2024)
Heft 5
.
- S. 2046-2058.
ISSN 1754-5706
DOI: https://doi.org/10.1039/d3ee02809g
Abstract
The production of green hydrogen through alkaline water electrolysis is the key technology for the future carbon-neutral industry. Nanocrystalline Co3O4 catalysts are highly promising electrocatalysts for the oxygen evolution reaction and their activity strongly benefits from Fe surface decoration. However, limited knowledge of decisive catalyst motifs at the atomic level during oxygen evolution prevents their knowledge-driven optimization. Here, we employ a variety of operando spectroscopic methods to unveil how Fe decoration increases the catalytic activity of Co3O4 nanocatalysts as well as steer the (near-surface) active state formation. Our study shows a link of the termination-dependent Fe decoration to the activity enhancement and a significantly stronger Co3O4 near-surface (structural) adaptation under the reaction conditions. The near-surface Fe- and Co-O species accumulate an oxidative charge and undergo a reversible bond contraction during the catalytic process. Moreover, our work demonstrates the importance of low coordination surface sites on the Co3O4 host to ensure an efficient Fe-induced activity enhancement, providing another puzzle piece to facilitate optimized catalyst design.
Weitere Angaben
| Publikationsform: | Artikel in einer Zeitschrift |
|---|---|
| Begutachteter Beitrag: | Ja |
| Zusätzliche Informationen: | WOS:001161880900001 |
| Institutionen der Universität: | Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie |
| Titel an der UBT entstanden: | Nein |
| Themengebiete aus DDC: | 500 Naturwissenschaften und Mathematik > 540 Chemie |
| Eingestellt am: | 12 Jun 2025 09:33 |
| Letzte Änderung: | 12 Jun 2025 09:33 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/93663 |