TY - GEN
T1 - Highly dispersed Pt nanoparticles decorated carbon nanocomposite (Pt 20/C 80) for sensitive nonenzymatic glucose determination and formic acid oxidation
AU - Singh, Baljit
AU - Dempsey, Eithne
PY - 2011
Y1 - 2011
N2 - A Pt 20/C 80 nanocomposite was synthesized by maintaining Pt content at 20% on an activated carbon support (80%), resulting in excellent Pt nanoparticles dispersion and catalytic performance towards direct electro-oxidation of glucose and formic acid. The compositional, structural and morphological characterization of Pt 20/C 80 were examined using transmission electron microscopy (TEM), thermogravimetric analysis (TGA/DTG), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). Cyclic voltammetry was employed in order to confirm the both, typical metallic electrochemical response and formic acid oxidation studies. Hydrodynamic amperometry was employed for direct glucose determination. The aim of the study was to improve the sensitivity and catalytic response by effective Pt surface utilisation and dispersion on carbon supporting matrix. Pt 20/C 80 resulted in excellent sensitivity (21.4 μAmM -1cm -2 at E app = 0.4 V vs Ag/AgCl) towards glucose sensing, over the range 0-10 mM in neutral conditions (pH 7.4). Results demonstrated the effective utility of precious Pt and strong capability for nonenzymatic glucose detection, while eliminating the pH, temperature sensitivity and lifetime issues associated with enzyme based glucose systems. The composite material was also tested for formic acid oxidation (0.5 M H 2SO 4 + 0.5 M HCOOH) and studies revealed its strong potential for direct formic acid fuel cell applications.
AB - A Pt 20/C 80 nanocomposite was synthesized by maintaining Pt content at 20% on an activated carbon support (80%), resulting in excellent Pt nanoparticles dispersion and catalytic performance towards direct electro-oxidation of glucose and formic acid. The compositional, structural and morphological characterization of Pt 20/C 80 were examined using transmission electron microscopy (TEM), thermogravimetric analysis (TGA/DTG), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). Cyclic voltammetry was employed in order to confirm the both, typical metallic electrochemical response and formic acid oxidation studies. Hydrodynamic amperometry was employed for direct glucose determination. The aim of the study was to improve the sensitivity and catalytic response by effective Pt surface utilisation and dispersion on carbon supporting matrix. Pt 20/C 80 resulted in excellent sensitivity (21.4 μAmM -1cm -2 at E app = 0.4 V vs Ag/AgCl) towards glucose sensing, over the range 0-10 mM in neutral conditions (pH 7.4). Results demonstrated the effective utility of precious Pt and strong capability for nonenzymatic glucose detection, while eliminating the pH, temperature sensitivity and lifetime issues associated with enzyme based glucose systems. The composite material was also tested for formic acid oxidation (0.5 M H 2SO 4 + 0.5 M HCOOH) and studies revealed its strong potential for direct formic acid fuel cell applications.
UR - http://www.scopus.com/inward/record.url?scp=84856865976&partnerID=8YFLogxK
U2 - 10.1109/ICSENS.2011.6126989
DO - 10.1109/ICSENS.2011.6126989
M3 - Conference contribution
AN - SCOPUS:84856865976
SN - 9781424492886
T3 - Proceedings of IEEE Sensors
SP - 711
EP - 715
BT - IEEE Sensors 2011 Conference, SENSORS 2011
T2 - 10th IEEE SENSORS Conference 2011, SENSORS 2011
Y2 - 28 October 2011 through 31 October 2011
ER -