Electrochemical Sensor with Bimetallic Pt-Ag Nanoparticle as Catalyst for the Measurement of Dissolved Formaldehyde

• Main Authors: Chen, Y. (Author), Cheng, Y. (Author), Shi, J. (Author), Su, L. (Author), Wang, X. (Author), Xinxin, L. (Author), Xu, P. (Author), Zhang, S. (Author), Zhang, Y. (Author)
• Format: Article
• Language: English
• Published: IOP Publishing Ltd 2022
• Subjects: ]+ catalyst; Amperometric; Bimetallics; Binary alloys; Catalyst activity; Core shell nanoparticles; Core-shell nanoparticles; Core-shell nanostructures; Cost effectiveness; Electrocatalysts; Electrochemical sensors; Food samples; Formaldehyde; Formaldehyde sensor; Human health; Measurements of; Nanocatalysts; On-site tests; Platinum; Platinum alloys; Shells (structures); Silver nanoparticles
• Online Access: View Fulltext in Publisher

 Formaldehyde (FA) in food is harmful to human health, an effective detecting tool is highly desired especially for the on-site test. Herein, an amperometric aqueous FA sensor was fabricated by applying Pt Ag core-shell nanoparticles as electrocatalyst. The well-characterized core-shell nanostructure exhibits high electro-catalytical activity for the detection of FA molecules in solution due to the synergistic effect of bimetallic Pt-Ag nanostructure. The proposed sensor exhibits high FA sensing performance, with a linear detection range from 1 to 100 μM and a limit of detection (LOD) down to 1.0 μM on the optimized conditions. Interferents coexisting in food samples were efficiently minimized by good selectivity. The Pt Ag nanostructure-based FA sensor keeps catalytical activity for at least 30 d and shows good batch reproducibility. The proposed sensor was applied for the detection of FA in the food samples and satisfactory results were obtained, showing potential for the fast, simple, disposable, and cost-effective FA detecting method for food safety. © 2022 Electrochemical Society Inc.. All rights reserved.