at Google ScholarTitle data
Schmidt, Franz-Philipp ; Götsch, Thomas ; Najafishirtari, Sharif ; Behrens, Malte ; Pratsch, Christoph ; Kenmoe, Stephane ; Douma, Dick Hartmann ; Girgsdies, Frank ; Allan, Jasmin ; Knop-Gericke, Axel ; Lunkenbein, Thomas:
Subnanometer Tracking of the Oxidation State on Co₃O₄ Nanoparticles by Identical Location Imaging and Spectroscopy.
In: ACS Applied Materials & Interfaces.
Vol. 17
(2025)
Issue 6
.
- pp. 9419-9430.
ISSN 1944-8252
DOI: https://doi.org/10.1021/acsami.4c20690
Abstract in another language
Understanding a catalytic reaction requires tools that elucidate the structure of the catalyst surface and subsurface, ideally at atomic resolution and under reaction conditions. Operando electron microscopy meets this requirement in some cases, but fails in others where the required reaction conditions cannot be reached or lead to an unwanted influence of the electron beam on the reactant and catalyst. We introduce ILIAS (identical location imaging and spectroscopy) in combination with a quasi in situ approach to disentangle the effect of heat and gas on the surface of nanoparticles from the effect of the electron beam. With this approach we allow high temperatures and pressures in any gaseous environment on the one hand, and atomic resolution imaging and spectroscopy on the other. As a proof of concept, we resolve the structural evolution of a Co3O4 spinel catalyst using ILIAS and track the oxidation state across the surface before and after heating in a reductive or oxidative environment. We then titrate the surface of the catalyst using CO as a probe molecule to remove highly active oxygen species formed during the thermal treatment, providing unprecedented insight into the interplay between pretreatment and surface reactivity of Co3O4 nanoparticles.
Further data
| Item Type: | Article in a journal |
|---|---|
| Refereed: | Yes |
| Additional notes: | WOS:001414502500001 |
| 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 |
| Result of work at the UBT: | No |
| DDC Subjects: | 500 Science > 540 Chemistry |
| Date Deposited: | 12 Jun 2025 07:22 |
| Last Modified: | 04 Jul 2025 11:31 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/93650 |