Efficient oxygen evolution on mesoporous IrO:X nanosheets

Bo Jiang, Jeonghun Kim, Yanna Guo, Kevin C.W. Wu, Saad M. Alshehri, Tansir Ahamad, Norah Alhokbany, Joel Henzie*, Yusuke Yamachi

*この研究の対応する著者

研究成果: Article査読

17 被引用数 (Scopus)

抄録

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 ∼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.

本文言語English
ページ(範囲)3697-3702
ページ数6
ジャーナルCatalysis Science and Technology
9
14
DOI
出版ステータスPublished - 2019
外部発表はい

ASJC Scopus subject areas

  • 触媒

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