title: Preparation and characterization of three dimensional graphene foam supported platinum-ruthenium bimetallic nanocatalysts for hydrogen peroxide based electrochemical biosensors.
abstract: The large surface, the excellent dispersion and the high degrees of sensitivity of bimetallic nanocatalysts were the attractive features of this investigation. Graphene foam (GF) was a three dimensional (3D) porous architecture consisting of extremely large surface and high conductive pathways. In this study, 3D GF was used incorporating platinum-ruthenium (PtRu) bimetallic nanoparticles as an electrochemical nanocatalyst for the detection of hydrogen peroxide (H2O2). PtRu/3D GF nanocatalyst exhibited a remarkable performance toward electrochemical oxidation of H2O2 without any additional mediator showing a high sensitivity (1023.1 µA mM(-1)cm(-2)) and a low detection limit (0.04 µM) for H2O2. Amperometric results demonstrated that GF provided a promising platform for the development of electrochemical sensors in biosensing and PtRu/3D GF nanocatalyst possessed the excellent catalytic activity toward the H2O2 detection. A small particle size and a high degree of the dispersion in obtaining of large active surface area were important for the nanocatalyst for the best H2O2 detection in biosensing. Moreover, potential interference by ascorbic acid and uric acid appeared to be negligible.
authors.affiliation: Department of Chemical Engineering, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH 44106, USA. Electronic address: cxk215@case.edu.
authors.forename: Chih-Chien
authors.initials: CC
authors.lastname: Kung
authors.forename: Po-Yuan
authors.initials: PY
authors.lastname: Lin
authors.forename: Frederick John
authors.initials: FJ
authors.lastname: Buse
authors.forename: Yuhua
authors.initials: Y
authors.lastname: Xue
authors.forename: Xiong
authors.initials: X
authors.lastname: Yu
authors.forename: Liming
authors.initials: L
authors.lastname: Dai
authors.forename: Chung-Chiun
authors.initials: CC
authors.lastname: Liu
mesh_terms: D015374:Biosensing Techniques / Q000379:methods*; D002384:Catalysis; D004563:Electrochemistry; D006108:Graphite / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000302:isolation & purification*; D053768:Metal Nanoparticles / Q000737:chemistry; D010084:Oxidation-Reduction; D010984:Platinum / Q000737:chemistry; D012428:Ruthenium / Q000737:chemistry
chemical_list: D010984:Platinum; D006108:Graphite; D012428:Ruthenium; D006861:Hydrogen Peroxide
keywords: 3D graphene foam (GF); Carbon supported materials; H(2)O(2) detection; Nanocatalysts; PtRu bimetallic nanoparticles