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A Facile Route to Fabricate Effective Pt/IrO2 Bifunctional Catalyst for Unitized Regenerative Fuel Cell

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Abstract

In order to fabricate effective bifunctional oxygen catalyst, IrO2 nanoparticles have been synthesized by hydrothermal method, and Pt/IrO2 bifunctional catalyst is then prepared by a microwave-assisted polyol process. X-ray diffraction and transmission electron microscopy are employed to characterize the catalysts, which reveal that Pt with a particle size of 2–3 nm is deposited on IrO2 surface. Electrochemical tests indicate that Pt/IrO2 bifunctional catalyst possesses much higher catalytic activity and durability towards both oxygen reduction reaction and oxygen evolution reaction than pure Pt or pure IrO2. Kinetic analysis shows that the oxygen reduction reaction on Pt/IrO2 catalyst mainly follows four-electron pathway.

Graphical Abstract

Ultrafine Pt particles (2–3 nm) are supported on the surface of amorphous IrO2 to form Pt/IrO2 bifunctional catalyst that possesses higher catalytic activities towards both OER and ORR.

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Acknowledgments

This work was financially supported by the National Natural Science Foundation of China (Grant No. 21276058, 21106024, and 21173062).

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Authors and Affiliations

  1. School of Fundamental Sciences, Jining Medical University, No. 16, He-Hua Street, Jining, 272000, Shandong, China

    Fan-Dong Kong, Jing Liu & Ai-Xia Ling

  2. School of Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, China

    Fan-Dong Kong, Sheng Zhang & Ge-Ping Yin

Authors
  1. Fan-Dong Kong
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  2. Sheng Zhang
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  3. Ge-Ping Yin
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  4. Jing Liu
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  5. Ai-Xia Ling
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Correspondence to Ge-Ping Yin.

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Kong, FD., Zhang, S., Yin, GP. et al. A Facile Route to Fabricate Effective Pt/IrO2 Bifunctional Catalyst for Unitized Regenerative Fuel Cell. Catal Lett 144, 242–247 (2014). https://doi.org/10.1007/s10562-013-1150-z

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  • DOI: https://doi.org/10.1007/s10562-013-1150-z

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