Theoretical Investigation of the Activity of Cobalt Oxides for the Electrochemical Oxidation of Water
Joint Center for Artificial Photosynthesis · University of California, Berkeley · +3 more institutions
Abstract
The presence of layered cobalt oxides has been identified experimentally in Co-based anodes under oxygen-evolving conditions. In this work, we report the results of theoretical investigations of the relative stability of layered and spinel bulk phases of Co oxides, as well as the stability of selected surfaces as a function of applied potential and pH. We then study the oxygen evolution reaction (OER) on these surfaces and obtain activity trends at experimentally relevant electro-chemical conditions. Our calculated volume Pourbaix diagram shows that β-CoOOH is the active phase where the OER occurs in alkaline media. We calculate relative surface stabilities and adsorbate coverages of the most stable low-index…
Citation impact
- FWCI
- 21.64
- Percentile
- 100%
- References
- 58
Authors
5- MBMichal BajdichCorresponding
Joint Center for Artificial Photosynthesis, University of California, Berkeley, Lawrence Berkeley National Laboratory
- MGMónica García‐Mota
Stanford University, Interface (United States)
- AVAleksandra Vojvodić
Stanford University, Interface (United States)
- JKJens K. Nørskov
Interface (United States), Stanford University
- ATAlexis T. Bell
Lawrence Berkeley National Laboratory, Joint Center for Artificial Photosynthesis, University of California, Berkeley
Topics & keywords
- Overpotential
- Chemistry
- Oxygen evolution
- Pourbaix diagram
- Cobalt
- Electrochemistry
- Oxygen
- Spinel
- Clean water and sanitation