Graphene–Pt nanocomposite for nonenzymatic detection of hydrogen peroxide with enhanced sensitivity

• Published in: Electrochemistry communications Vol. 13; no. 10; pp. 1131 - 1134
• Main Authors: Xu, Fugang, Sun, Yujing, Zhang, Yue, Shi, Yan, Wen, Zhiwei, Li, Zhuang
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 01.10.2011; Amsterdam Elsevier; New York, NY
• Subjects: Analytical chemistry; Chemistry; Electrochemical methods; Exact sciences and technology; Graphene; Hydrogen peroxide; Nanocomposite; Nonenzymatic sensor; Platinum nanoparticle; Nonenzymatic sensor; Nanocomposite; Hydrogen peroxide; Graphene; Platinum nanoparticle; Nanoparticle; Transition metal; Nanostructure; Composite material; Electrochemical detector; Surface structure; Electrocatalysis; Sensitivity; Energy-dispersive X-ray spectrometry; Transmission electron microscopy; Platinum; Morphology; Detection
• ISSN: 1388-2481; 1873-1902
• DOI: 10.1016/j.elecom.2011.07.017

A sensitive hydrogen peroxide (H 2O 2) sensor was fabricated based on graphene–Pt (GN–Pt) nanocomposite. The GN–Pt was synthesized by photochemical reduction of K 2PtCl 4 on GNs, and characterized by atomic force microscope (AFM), transmission electron microscope (TEM), and energy-dispersive X-ray spectroscopy (EDS). Electrochemical investigations indicated that the GN–Pt exhibited a high peak current and low overpotential towards the reduction of H 2O 2. The GN–Pt modified glass carbon electrode displayed a wide linear range (2–710 μM), low limit of detection (0.5 μM) and good selectivity for detection of H 2O 2 with a much higher sensitivity than that of Pt nanoparticles or graphene modified electrode. ► Graphene-Pt composite with high coverage of Pt nanoparticles is synthesized by a photochemical approach for the first time. ► Graphene-Pt exhibits larger peak current and lower overpotential for H 2O 2 reduction than Pt nanoparticles. ► Graphene-Pt displays much higher sensitivity and lower detection limit for H 2O 2 sensing than Pt nanoparticles or graphene.