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Grain size effect of IrO2 nanocatalysts for the oxygen evolution reaction

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Wuhan University Journal of Natural Sciences

Abstract

Combined with air annealing, rutile-structured IrO2 nanoparticles with various sizes were prepared using colloidal method. The nanoparticles were used as the electrocatalysts for the oxygen evolution reaction (OER) in acidic media, and their grain size effect was studied. The results show that with the increase in annealing temperature, the grain size of the catalyst increases, and the voltammetric charges (the electroactive areas) and apparent activity for the OER decrease. The relationship between the intrinsic activity and the annealing temperature exhibits a volcano-type curve and the catalyst annealed at 550 °C achieved the best result.

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Authors and Affiliations

  1. College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, Hubei, China

    Wei Hu

  2. Hubei Key Laboratory of Electrochemical Power Sources, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, Hubei, China

    Wei Hu & Shengli Chen

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  1. Wei Hu
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  2. Shengli Chen
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Correspondence to Shengli Chen.

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Foundation item: Supported by the National Natural Science Foundation of China (21073137) and National Basic Research Program of China (2012CB932800)

Biography: HU Wei, female, Lecturer, Ph. D., research direction: electrochemistry.

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Hu, W., Chen, S. Grain size effect of IrO2 nanocatalysts for the oxygen evolution reaction. Wuhan Univ. J. Nat. Sci. 18, 289–294 (2013). https://doi.org/10.1007/s11859-013-0930-z

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  • DOI: https://doi.org/10.1007/s11859-013-0930-z

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