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Nickel Confined in the Interlayer Region of Birnessite: an Active Electrocatalyst for Water Oxidation.
- Source :
-
Angewandte Chemie . 8/22/2016, Vol. 128 Issue 35, p10537-10541. 5p. - Publication Year :
- 2016
-
Abstract
- We report a synthetic method to enhance the electrocatalytic activity of birnessite for the oxygen evolution reaction (OER) by intercalating Ni2+ ions into the interlayer region. Electrocatalytic studies showed that nickel (7.7 atomic %)-intercalated birnessite exhibits an overpotential ( η) of 400 mV for OER at an anodic current of 10 mA cm−2. This η is significantly lower than the η values for birnessite ( η≈700 mV) and the active OER catalyst β-Ni(OH)2 ( η≈550 mV). Molecular dynamics simulations suggest that a competition among the interactions between the nickel cation, water, and birnessite promote redox chemistry in the spatially confined interlayer region. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00448249
- Volume :
- 128
- Issue :
- 35
- Database :
- Academic Search Index
- Journal :
- Angewandte Chemie
- Publication Type :
- Academic Journal
- Accession number :
- 117484637
- Full Text :
- https://doi.org/10.1002/ange.201601935