Journal
CATALYSIS SCIENCE & TECHNOLOGY
Volume 9, Issue 14, Pages 3697-3702Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9cy00302a
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Funding
- Australian Research Council (ARC) Future Fellow [FT150100479]
- JSPS KAKENHI [19H02803, 19F19074]
- Suzuken Memorial Foundation
- International Scientific Partnership Program at King Saud University (KSU) [ISPP-024]
- Grants-in-Aid for Scientific Research [19H02803, 19F19074] Funding Source: KAKEN
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Amorphous iridium oxide (IrOx) is a 5d rare metal-based catalyst that has high activity towards the oxygen evolution reaction (OER) over a broad range of pH values. The scarcity of the elemental Ir makes large-scale applications more challenging, so increasing the material utilization efficiency is critical. We developed a sophisticated soft-templating method to synthesize mesoporous nanosheets via solution-based assembly of close-packed polymeric micelles in the presence of metal precursors and reducing agents. Heating the mesoporous nanosheets caused them to form amorphous IrOx perforated with a semi-regular arrangement of similar to 13 nm diameter holes. Mesoporous nanosheets have a unique mixture of 2D and 3D topologies that enable superior electrocatalytic activities for the OER, and good stabilities under both acidic and basic conditions.
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