Laha, Sourav and Lee, Yonghyuk and Podjaski, Filip and Weber, Daniel and Duppel, Viola and Schoop, Leslie M. and Pielnhofer, Florian and Scheurer, Christoph and Mueller, Kathrin and Starke, Ulrich and Reuter, Karsten and Lotsch, Bettina V. (2019) Ruthenium Oxide Nanosheets for Enhanced Oxygen Evolution Catalysis in Acidic Medium. ADVANCED ENERGY MATERIALS, 9 (15): 1803795. ISSN 1614-6832, 1614-6840
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The fabrication of highly active and robust hexagonal ruthenium oxide nanosheets for the electrocatalytic oxygen evolution reaction (OER) in an acidic environment is reported. The ruthenate nanosheets exhibit the best OER activity of all solution-processed acid medium electrocatalysts reported to date, reaching 10 mA cm(-2) at an overpotential of only approximate to 255 mV. The nanosheets also demonstrate robustness under harsh oxidizing conditions. Theoretical calculations give insights into the OER mechanism and reveal that the edges are the origin of the high OER activity of the nanosheets. Moreover, the post OER analyses indicate, apart from coarsening, no observable change in the morphology of the nanosheets or oxidation states of ruthenium during the electrocatalytic process. Therefore, the present investigation suggests that ruthenate nanosheets are a promising acid medium OER catalyst with application potential in proton exchange membrane electrolyzers and beyond.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | WATER OXIDATION; HIGHLY EFFICIENT; IRIDIUM OXIDE; ELECTROCATALYSIS; MECHANISM; RU; IR; NANOPARTICLES; ELECTROLYSIS; EXFOLIATION; DFT calculations; electrocatalysis; exfoliation; nanosheets; OER mechanism; oxygen evolution reaction; water splitting |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Anorganische Chemie Chemistry and Pharmacy > Institut für Anorganische Chemie > Chair Prof. Dr. Arno Pfitzner |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 14 Apr 2020 05:44 |
| Last Modified: | 14 Apr 2020 05:44 |
| URI: | https://pred.uni-regensburg.de/id/eprint/27155 |
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