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Nanoporous IrO2 catalyst with enhanced activity and durability for water oxidation through advancing the micro/meso-pore structure

Abstract

Herein, we report a nanoporous IrO2 catalyst with the highest surface area ever reported at 363.3 m2 g-1. The IrO2 catalysts are prepared through a facile and efficiently scaled up (up to kilograms) ammonia-induced pore-forming method. Bimodal micro/meso-pores are created all at once without the presence of template. The overpotential to attain current density at 10 mA cm-2 for water oxidation is only 282 mV and the excellent durability is confirmed by the accelerated durability test for the IrO2 (1:100)-450 °C (nH2IrCl6 : nNH3·H2O = 1:100) catalyst. Moreover, the overall voltage to achieve current density at 1000 mA cm-2 in a water electrolysis cell is only 1.649 V for IrO2 (1:100)-450 °C, thus making it highly attractive for application in water electrolysis.

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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, Accepted Manuscript
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    Nanoporous IrO2 catalyst with enhanced activity and durability for water oxidation through advancing the micro/meso-pore structure

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

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