Fabrication of Ag nanoparticles decorated on the NiAl-oxide@PPy for non-enzymatic H2O2 sensing

• Published in: Ionics 2023-09, Vol.29 (9), p.3759-3767
• Main Authors: Yan, Wei, Zeng, Hong-Yan, Zhang, Kai, Zou, Kai-Min
• Format: Article
• Language: English
• Subjects: Chemistry; Chemistry and Materials Science; Condensed Matter Physics; Electrochemistry; Energy Storage; Hydrogen peroxide; Intermetallic compounds; Nanoparticles; Nickel aluminides; Nickel base alloys; Nickel compounds; Optical and Electronic Materials; Original Paper; Renewable and Green Energy; Reproducibility; Sensitivity; Structural analysis
• ISSN: 0947-7047; 1862-0760
• DOI: 10.1007/s11581-023-05138-0

The NiAlO@PPy-Ag sensing material was designed and prepared via in-situ oxidative polymerization of pyrrole monomer on the NiAl-oxide (NiAlO), and then anchoring Ag nanoparticles (NPs) on the surface of the NiAlO@PPy carrier. It was determined that the NiAlO particles were encased by PPy chains and Ag NPs were homogeneously distributed on the NiAlO@PPy based on various structural characterization. Subsequently, the NiAlO@PPy-Ag was directly fabricated into a non-enzymatic sensor for the detection of H 2 O 2 , which sensor showed a high sensitivity and selectivity toward H 2 O 2 with a low detection limit of 0.03 μmol∙L −1 and high sensitivity of 346.50 μA∙mmol −1 ∙cm −2 , and excellent repeatability and reproducibility. The results demonstrated that the NiAlO@PPy-Ag was a promising electrocatalytic material for H 2 O 2 detection in the biological, clinical and environmental fields. Graphical abstract