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Issue 27, 2017
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Nanoporous IrO2 catalyst with enhanced activity and durability for water oxidation owing to its micro/mesoporous structure

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Abstract

Herein, we report a nanoporous IrO2 catalyst with a surface area of 363.3 m2 g−1, the highest ever reported. The IrO2 catalysts were prepared by a facile ammonia-induced pore-forming method, and efficiently scaled up to several kilograms. Bimodal micro/mesopores were created at once without using a template. For the IrO2 (1 : 100)-450 °C (H2IrCl6 : NH3·H2O of 1 : 100) catalyst, the overpotential to attain a current density of 10 mA cm−2 for water oxidation was only 282 mV, and furthermore, its excellent durability was confirmed by accelerated durability tests. Moreover, the overall voltage to achieve a current density of 1000 mA cm−2 in a water electrolysis cell was only 1.649 V, making IrO2 (1 : 100)-450 °C a highly attractive catalyst for water electrolysis applications.

Graphical abstract: Nanoporous IrO2 catalyst with enhanced activity and durability for water oxidation owing to its micro/mesoporous structure

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Publication details

The article was received on 24 Apr 2017, accepted on 08 Jun 2017 and first published on 13 Jun 2017


Article type: Communication
DOI: 10.1039/C7NR02899G
Citation: Nanoscale, 2017,9, 9291-9298
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    Nanoporous IrO2 catalyst with enhanced activity and durability for water oxidation owing to its micro/mesoporous structure

    G. Li, S. Li, M. Xiao, J. Ge, C. Liu and W. Xing, Nanoscale, 2017, 9, 9291
    DOI: 10.1039/C7NR02899G

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