Fabrication of Pt-MWNT/Nafion Electrodes by Low-Temperature Decal Transfer Technique for Amperometric Hydrogen Detection

• DOI: 10.5229/jkes.2014.17.1.18
• Publication Date: 2014-04-04T01:59:36Z
• Authors: Muhammad Rashid; Tae-Sun Jun; Yong Shin Kim
• Keywords: Nafion; Amperometry; Nanoporous

A Pt nanoparticle-decorated multiwall carbon nanotube (Pt-MWNT) electrode was prepared on Nafion by a hot-pressing at relatively low temperature. This exhibited an intricate entangled, nanoporous structure as result of gathering highly anisotropic Pt-MWNTs. Individual nanoparticles were confirmed to have polycrystalline face-centered cubic with average crystal size around 3.5 nm. From the cyclic voltammograms for hydrogen redox reactions, Pt-MWNT found similar electrochemical behavior Pt, and specific surface area <TEX>$2170cm^2mg^{-1}$</TEX>. Upon exposure analyte, Pt-MWNT/Nafion demon-strated very high sensitivity <TEX>$3.60{\mu}A\;ppm^{-1}$</TEX> excellent linear response over concentration range 100-1000 ppm. Moreover, this also evaluated in terms recovery times, reproducibility, long-term stability. Obtained results revealed good sensing performance detection.