Electrode reconstruction strategy for oxygen evolution reaction: maintaining Fe-CoOOH phase with intermediate-spin state during electrolysis
Seoul National University · Korea Institute of Science and Technology · +5 more institutions
Abstract
Abstract Computational calculations and experimental studies reveal that the CoOOH phase and the intermediate-spin (IS) state are the key factors for realizing efficient Co-based electrocatalysts for the oxygen evolution reaction (OER). However, according to thermodynamics, general cobalt oxide converts to the CoO 2 phase under OER condition, retarding the OER kinetics. Herein, we demonstrate a simple and scalable strategy to fabricate electrodes with maintaining Fe-CoOOH phase and an IS state under the OER. The changes of phase and spin states were uncovered by combining in-situ /operando X-ray based absorption spectroscopy and Raman spectroscopy. Electrochemical reconstruction of chalcogenide treated Co foam…
Citation impact
- FWCI
- 20.50
- Percentile
- 100%
- References
- 52
Authors
6- WHWoong Hee Lee
Seoul National University, Korea Institute of Science and Technology
- MHMan Ho Han
Korea University, Korea Institute of Science and Technology
- YKYoung‐Jin Ko
Korea Institute of Science and Technology
- BKByoung Koun Min
Korea University, Korea University, Korea Institute of Science and Technology
- KHKeun Hwa ChaeCorresponding
Advanced Analysis Center, Korea Institute of Science and Technology
Topics & keywords
- Oxygen evolution
- Chalcogenide
- Materials science
- Electrolysis
- Electrode
- Electrochemistry
- Raman spectroscopy
- Spin states
- Clean water and sanitation