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

• Published in: Sensors and actuators. B, Chemical Chemical, 2023-12, Vol.396 (C), p.134512, Article 134512
• Main Authors: Mandavkar, Rutuja, Lin, Shusen, Habib, Md Ahasan, Burse, Shalmali, Joni, Mehedi Hasan, Kunwar, Sundar, Najar, Adel, Aravindh, S. Assa, Jeong, Jae-Hun, Lee, Jihoon
• Format: Article
• Language: English
• Subjects: 3D porous platform; Au MNP decoration; Au/CuO/Pt hybrid electrode; H2O2 sensor; Porous CuO dendrites; Pt NPs
• ISSN: 0925-4005; 1873-3077
• DOI: 10.1016/j.snb.2023.134512

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. [Display omitted] •Demonstration of 3D porous Au/CuO/Pt hybrid architecture to overcome the limitations of non-enzymatic H2O2 sensing.•Demonstration of a record high sensitivity of 25,836 µA mM−1 cm−2 and LOD of 1.8 nM.•Demonstration of excellent selectivity against interfering molecules.•Demonstration of outstanding stability and a wide linear range of 0.5 µM – 10 mM.•Demonstration of on-chip biosensor kit on a single chip including the WE, RE and CE.