Ultra-sensitive H2O2 sensing with 3-D porous Au/CuO/Pt hybrid framework

Rutuja Mandavkar, Shusen Lin, Md Ahasan Habib, Shalmali Burse, Mehedi Hasan Joni, Sundar Kunwar, Adel Najar, S. Assa Aravindh, Jae Hun Jeong, Jihoon Lee

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

A 3-D porous Au/CuO/Pt hybrid platform is proposed to overcome the drawbacks of non-enzymatic H2O2 sensing. The Au/CuO/Pt hybrid sensor exhibits an extraordinary catalytic performance towards H2O2 reduction with an ultra-high sensitivity of 25,836 µA mM−1 cm−2 and a limit of detection of 1.8 nM (S/N = 3). It demonstrates an excellent anti-interference ability for NaCl, fructose, ascorbic acid, citric acid, dopamine, and glucose. The hybrid Au/CuO/Pt sensor exhibits outstanding stability for a wide range of molarity applications as well as a stable current for a long period of 30 h. These rank the proposed Au/CuO/Pt framework as one of the best-performing non-enzymatic H2O2 sensors. The rapid redox reaction is the synergistic result of superior catalytic response, large electrochemical-active surface area, high conductivity, and improved electron transfer pathways offered by the unique configuration of high porosity and metallic nano-micro-NP decoration.

Original languageEnglish
Article number134512
JournalSensors and Actuators B: Chemical
Volume396
DOIs
Publication statusPublished - Dec 1 2023

Keywords

  • 3D porous platform
  • Au MNP decoration
  • Au/CuO/Pt hybrid electrode
  • HO sensor
  • Porous CuO dendrites
  • Pt NPs

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

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