Journal
SUSTAINABLE ENERGY & FUELS
Volume 4, Issue 5, Pages 2462-2468Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0se00007h
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Funding
- United Funding of China [U1931116]
- Fundamental Research Funds for the Central Universities [2682019CX68]
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Here we report IrO2 with dendrite-like nanostructures (DLNs) as a catalyst for the oxygen evolution reaction (OER) in acidic solution. The IrO2 DLNs are prepared by the molten salt method and have self-standing three dimensional structures. IrO2 with DLNs has a high mass activity determined to be 19-fold that of commercial IrO2. Combining a wide array of ex situ characterization methods, we demonstrate that the sublayer Ir cations and lattice O participate in the OER. The Ir corrosion and O/OH- adsorption during the OER can lead to IrO2 surface reconstruction, from a compressed one to a stretched one.
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