at Google ScholarTitle data
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.
Vol. 17
(2024)
Issue 5
.
- pp. 2046-2058.
ISSN 1754-5706
DOI: https://doi.org/10.1039/d3ee02809g
Abstract in another language
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.
Further data
| Item Type: | Article in a journal |
|---|---|
| Refereed: | Yes |
| Additional notes: | WOS:001161880900001 |
| 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 09:33 |
| Last Modified: | 04 Jul 2025 11:31 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/93663 |