Journal
NATURE COMMUNICATIONS
Volume 11, Issue 1, Pages -Publisher
NATURE PORTFOLIO
DOI: 10.1038/s41467-020-15231-x
Keywords
-
Categories
Funding
- Diamond Light Source [SP14239]
- European Research Council (ERC) [670116-ARPEMA]
- National Natural Science Foundation of China [21972172]
- ANR MIDWAY [ANR-17-CE05-0008]
- Velux Foundations through the research center V-Sustain [9455]
- French National Research Agency through the Labex STORE-EX project [ANR-10LABX-76-01]
Ask authors/readers for more resources
The production of hydrogen at a large scale by the environmentally-friendly electrolysis process is currently hampered by the slow kinetics of the oxygen evolution reaction (OER). We report a solid electrocatalyst alpha-Li2IrO3 which upon oxidation/delithiation chemically reacts with water to form a hydrated birnessite phase, the OER activity of which is five times greater than its non-reacted counterpart. This reaction enlists a bulk redox process during which hydrated potassium ions from the alkaline electrolyte are inserted into the structure while water is oxidized and oxygen evolved. This singular charge balance process for which the electrocatalyst is solid but the reaction is homogeneous in nature allows stabilizing the surface of the catalyst while ensuring stable OER performances, thus breaking the activity/stability tradeoff normally encountered for OER catalysts.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available