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Simultaneous determination of hydroquinone and catechol using a glassy carbon electrode modified with Au@Pd loaded on reduced graphene oxide

Abstract

Au@Pd core-shell nanoplates were synthesized successfully through the heterogeneous, epitaxial growth of Au on Pd nanoplates. The Pd nanoplates were prepared by reducing H2PdCl4 with PVP, then served as seeds for the nucleation of Au atoms formed by reducing HAuCl4 with citric acid. Characterization of the as-prepared Au-Pd nanoplates by scanning electron microscopy reveals that Au shell was formed around the Pd nanoplate. In order to avoid the agglomeration, the Au@Pd nanoplates were loaded on the reduced graphene to give Au@Pd/rGO nanohybrid which exhibited excellent electrocatalytic activity toward the redox of hydroquinone (HQ) and catechol (CC) simultaneously. The linear detection ranges were 0.01-400.00 μM for HQ and 0.10-400.00 μM for CC, with the detection limits of 0.01 μM for HQ and 0.10 μM for CC. Because of the excellent performance of lower detection, wider linear range and better selectivity, the prepared Au@Pd/rGO nanohybrid with more potential applications has an expectation in the electrochemical sensing field.

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Publication details

The article was received on 24 Nov 2017, accepted on 02 Feb 2018 and first published on 02 Feb 2018


Article type: Paper
DOI: 10.1039/C7AY02718D
Citation: Anal. Methods, 2018, Accepted Manuscript
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    Simultaneous determination of hydroquinone and catechol using a glassy carbon electrode modified with Au@Pd loaded on reduced graphene oxide

    H. Wang, S. Zhang, S. Li and J. Qu, Anal. Methods, 2018, Accepted Manuscript , DOI: 10.1039/C7AY02718D

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