Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 55, Issue 35, Pages 10381-10385Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201601935
Keywords
birnessite; electrochemistry; nickel intercalation; oxygen evolution reaction; water splitting
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Funding
- Center for the Computational Design of Functional Layered Materials, an Energy Frontier Research Center - U.S. Department of Energy, Office of Science, Basic Energy Sciences [DE-SC0012575]
- NSF [1428149]
- NIH NIGMS COBRE program [P30-GM110758]
- Division Of Chemistry
- Direct For Mathematical & Physical Scien [1428149] Funding Source: National Science Foundation
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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 (eta) of 400 mV for OER at an anodic current of 10 mA cm(-2). This eta is significantly lower than the eta values for birnessite (eta approximate to 700 mV) and the active OER catalyst beta-Ni(OH)(2) (eta approximate to 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.
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