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Size‐Dependent and Self‐Catalytic Gold@Prussian Blue Nanoparticles for the Electrochemical Detection of Hydrogen Peroxide
Author(s) -
Zhang Minwei,
Zhang Wenrui,
Engelbrekt Christian,
Hou Chengyi,
Zhu Nan,
Chi Qijin
Publication year - 2020
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.202000988
Subject(s) - prussian blue , electrocatalyst , nanomaterials , nanotechnology , nanoparticle , hydrogen peroxide , catalysis , electrochemistry , colloidal gold , biosensor , materials science , chemical engineering , chemistry , electrode , organic chemistry , engineering
Prussian blue (PB) nanoparticle (NP)‐based nanomaterials have become a subject of intense interest, because of their intriguing physical and chemical properties that differ from their bulk counterparts, leading to novel applications in electrocatalysis. However, the size effect of PB NPs on the electrocatalytic performance is still ambiguous and hinders further applications for the study of biomimetic sensors. In this work, a new approach to synthesize core‐shell Au@PB NPs is presented, using gold nanoparticles as catalysts for the fabrication of size‐controllable, highly stable, water‐soluble, biologically compatible and highly electrochemically active PB NPs. As a result, all sizes of Au@PB NPs display high electrochemical activity towards peroxidase biomimicry. Furthermore, the size effect of PB‐based electrocatalysis has been investigated, showing the best performance for 18 nm Au@PB NPs. This insight could be used for the design and application of PB‐based nanomaterials in biosensors.