| Autor: |
Yuanyuan Tian, Shuo Wang, Ever Velasco, Yueping Yang, Lujie Cao, Linjuan Zhang, Xing Li, Yichao Lin, Qiuju Zhang, Liang Chen |
| Jazyk: |
angličtina |
| Rok vydání: |
2020 |
| Předmět: |
|
| Zdroj: |
iScience, Vol 23, Iss 1, Pp - (2020) |
| Druh dokumentu: |
article |
| ISSN: |
2589-0042 |
| DOI: |
10.1016/j.isci.2019.100756 |
| Popis: |
Summary: Active and highly stable electrocatalysts for oxygen evolution reaction (OER) in acidic media are currently in high demand as a cleaner alternative to the combustion of fossil fuels. Herein, we report a Co-doped nanorod-like RuO2 electrocatalyst with an abundance of oxygen vacancies achieved through the facile, one-step annealing of a Ru-exchanged ZIF-67 derivative. The compound exhibits ultra-high OER performance in acidic media, with a low overpotential of 169 mV at 10 mA cm−2 while maintaining excellent activity, even when exposed to a 50-h galvanostatic stability test at a constant current of 10 mA cm−2. The dramatic enhancement in OER performance is mainly attributed to the abundance of oxygen vacancies and modulated electronic structure of the Co-doped RuO2 that rely on a vacancy-related lattice oxygen oxidation mechanism (LOM) rather than adsorbate evolution reaction mechanism (AEM), as revealed and supported by experimental characterizations as well as density functional theory (DFT) calculations. : Catalysis; Electrochemical Energy Production; Nanomaterials Subject Areas: Catalysis, Electrochemical Energy Production, Nanomaterials |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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