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Chronoamperometric Observation and Analysis of Electrocatalytic Ability of Single Pd Nanoparticle for Hydrogen Peroxide Reduction Reaction

Department of Chemistry, Konkuk University, 120 Neungdong-ro Gwangjin-gu, Seoul 143-701, Korea
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Nanomaterials 2018, 8(11), 879; https://doi.org/10.3390/nano8110879
Received: 21 September 2018 / Revised: 18 October 2018 / Accepted: 23 October 2018 / Published: 26 October 2018
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Abstract

The current generated by the collision of a single nanoparticle (NP) of palladium (Pd) on a gold (Au) ultramicroelectrode (UME) surface was observed using an electrocatalytic amplification method. The hydrogen peroxide reduction reaction was used for the electrocatalytic reaction because the hydrogen peroxide reduction reaction has no gas-phase product, which would induce rapid signal decay. The electrocatalytic current resulting from a single Pd nanoparticle on the Au UME shows a staircase response with accompanying slow current decay. The applying potential and concentration of hydrogen peroxide were optimized for clear distinction of signal. The height of the current step and signal frequency were analyzed and compared with the theoretical expectation. The analysis of the electrocatalytic activity of single Pd NPs provides insight toward their future application. View Full-Text
Keywords: palladium; single nanoparticle; collision; electrocatalytic amplification; hydrogen peroxide palladium; single nanoparticle; collision; electrocatalytic amplification; hydrogen peroxide
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Park, J.Y.; Kim, K.J.; Son, H.; Kwon, S.J. Chronoamperometric Observation and Analysis of Electrocatalytic Ability of Single Pd Nanoparticle for Hydrogen Peroxide Reduction Reaction. Nanomaterials 2018, 8, 879.

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