Premium
Open Pore Architecture of an Ordered Mesoporous IrO 2 Thin Film for Highly Efficient Electrocatalytic Water Oxidation
Author(s) -
Chandra Debraj,
Abe Naoto,
Takama Daisuke,
Saito Kenji,
Yui Tatsuto,
Yagi Masayuki
Publication year - 2015
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201402911
Subject(s) - mesoporous material , materials science , calcination , chemical engineering , anode , copolymer , electrocatalyst , mesoporous silica , porosity , coating , thin film , nanotechnology , catalysis , electrochemistry , electrode , chemistry , organic chemistry , polymer , composite material , engineering
We report the first accessible channel‐like open pore architecture of ordered 2D hexagonal mesoporous IrO 2 films and its utilization as an efficient anode for electrocatalytic water oxidation. A well‐ordered mesostructure of circa 7 nm pores were obtained by a facile one‐pot soft‐templating strategy, employing a [Ir(OH) 6 ] 2− precursor stabilized by a triblock copolymer “Pluronic F127” as a pore‐directing template. A mesoporous IrO 2 film calcined at 400 °C (∼70 nm thick) affords a high surface area of 512 m 2 cm −3 and 2 times higher O 2 evolution during the electrocatalytic water oxidation relative to an untemplated IrO 2 coating film.