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A Non-enzymatic Hydrogen Peroxide Sensor with Enhanced Sensitivity Based on Pt Nanoparticles
Azka Awais1, Muhammad Arsalan1, Qinglin Sheng2,3
1College of Chemistry & Materials Science/Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education/Shaanxi Provincial Key Laboratory of Electroanalytical Chemistry, Northwest University, Xi'an Shaanxi, 710069, China.
A novel ternary platinum, nickel, and cobalt nanoparticle (PtNiCo-NPs) sensor demonstrates highly sensitive and specific electrochemical detection of hydrogen peroxide (H₂O₂). This advanced nanomaterial offers excellent stability and reproducibility for H₂O₂ sensing applications.
Area of Science:
- Electrochemistry
- Nanomaterials Science
- Analytical Chemistry
Background:
- Hydrogen peroxide (H₂O₂) is a crucial analyte in various biological and chemical processes.
- Development of sensitive and selective electrochemical sensors is vital for accurate H₂O₂ detection.
- Platinum-based nanomaterials are promising for electrocatalytic applications.
Purpose of the Study:
- To investigate a non-enzymatic electrochemical sensing platform for H₂O₂ using ternary platinum-based nanoparticles.
- To characterize the synthesized PtNiCo-NPs and evaluate their performance for H₂O₂ sensing.
- To demonstrate the specificity, stability, and reproducibility of the developed sensor.
Main Methods:
- Synthesis and characterization of ternary platinum, nickel, and cobalt nanoparticles (PtNiCo-NPs) using techniques like XRD, TEM, HRTEM, EDS, and XPS.
- Fabrication of the sensor by drop-casting PtNiCo-NPs onto a fluorine-doped tin oxide (FTO) electrode.
- Electrochemical evaluation using amperometry and cyclic voltammetry for H₂O₂ detection.
Main Results:
- PtNiCo-NPs exhibited superior electrochemical performance compared to mono- and bimetallic counterparts.
- The sensor achieved a wide linear range (5 μM to 16.5 mM), a low detection limit (0.37 μM), and high sensitivity (1374.4 μA mM⁻¹ cm⁻²).
- The PtNiCo-NP sensor demonstrated high specificity, with no interference from common agents, and showed excellent stability and reproducibility in real samples.
Conclusions:
- Ternary PtNiCo-NPs offer a promising new nanomaterial for highly effective non-enzymatic electrochemical H₂O₂ sensing.
- The developed sensor exhibits excellent performance metrics, including sensitivity, selectivity, and stability.
- This work provides a novel approach for fabricating advanced ternary nanomaterials for H₂O₂ detection.
