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Galvanic deposition and electrocatalytic oxygen reduction of standing Pt/AgCl-coated Ag nanosheets

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Abstract

A standing Pt/AgCl-coated Ag nanosheet array is prepared using galvanic displacement during which an Ag nanosheet is used as a sacrificial substrate. The results demonstrate that a polycrystalline layer composed of Pt and AgCl is directly deposited onto a standing Ag nanosheet composed essentially of (111) planes. When displacement time is lengthened, the nanosheet thickness and the amount of Pt deposited are found to be time-dependent properties. Furthermore, this nanosheet array is successfully applied as a catalyst for catalyzing base oxygen reduction reaction (ORR) in a 1 M NaOH electrolyte. The mass activity at 0.9 V (vs. RHE) for Pt/AgCl-coated Ag nanosheet array is 1.285 × 10−2 mAμg−1, higher than 3.53 × 10−3 mAμg−1 by Pt/C. After 1000 cycle tests, the array catalyst can remain 81 % in activity.

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Acknowledgments

The authors would like to thank the Ministry of Science and Technology, Taiwan, for supporting this research financially under contract no. NSC 101-2628-E-151-001-MY2 and Mr. Shyne-Yen Yao at National Chen-Kung University and Mr. Mr. Hsien-Tsan Lin of Regional Instruments Center at National Sun Yat-Sen University for their help in TEM experiments.

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  1. Department of Chemical and Materials Engineering, National Kaohsiung University of Applied Sciences, Kaohsiung, 807, Taiwan

    Chia-Chen Yang, Ho-Rei Chen & Chien-Liang Lee

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  1. Chia-Chen Yang
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  2. Ho-Rei Chen
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Correspondence to Chien-Liang Lee.

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Yang, CC., Chen, HR. & Lee, CL. Galvanic deposition and electrocatalytic oxygen reduction of standing Pt/AgCl-coated Ag nanosheets. J Solid State Electrochem 19, 663–670 (2015). https://doi.org/10.1007/s10008-014-2648-z

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  • DOI: https://doi.org/10.1007/s10008-014-2648-z

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