Electroreduction of Oxygen and Electrooxidation of Methanol at Carbon and Single Wall Carbon Nanotube Supported Platinum Electrodes

Abstract

The present research aimed at investigating the electrocatalytic properties and the electrochemical deposition of Pt nanoparticles on carbon powder, carbon nanotube and preparation of carbon and single wall carbon nanotube supported platinum electrodes. The Pt nanoparticles were synthesized by electroreduction of hexachloroplatinic acid in aqueous solution at À 200 mV. Electrocatalytic properties of the modified electrodes for oxygen reduction were investigated by cyclic voltammetry in O 2 saturated solution containing 0.1 M HClO 4 . Methanol electrooxidation at the modified surfaces in 0.5 M HCLO 4 was studied by cyclic voltammetry. The corresponding results showed that the Pt/ SWCNT/GC electrode exhibits more improved catalytical activity than the Pt/C/GC electrode.

Well-dispersed and size-tuned bimetallic PtFex nanoparticle catalysts supported on ordered mesoporous carbon for enhanced electrocatalytic activity in direct methanol fuel cells

“…24 However, the aim of the past work is to analyze the effects of Pt structures on the ORR activity and on their methanol tolerance. 3,20,[25][26][27] To our knowledge, there are very few studies concerning the electrocatalysis of PtFe x bimetallic catalysts supported on OMC for the electrooxidation of methanol and electroreduction of oxygen.…”

Pt nanoparticle modified single walled carbon nanotube network electrodes for electrocatalysis: Control of the specific surface area over three orders of magnitude

“…Previous studies investigating the electrodeposition of Pt on CNTs for electrocatalytic studies have tended to employ nanotube electrodes prepared by dropcasting onto glassy carbon [21,22] or other conducting substrates [23], which can complicate the electrochemical analysis due to the rather large background currents of the support electrode. In contrast, pristine single walled carbon nanotubes (SWNTs) grown on an insulating Si/SiO 2 support using chemical vapour deposition (CVD) have been shown to provide an excellent SWNT electrode for the deposition of Ag, Au, Pd and Pt NPs [13,20,24,25] and have also been used to examine ORR at the single NP scale [26].…”

Enhanced Electrocatalytic Performance of Anthraquinonemonosulfonate‐Doped Polypyrrole Composite: Electroanalysis for the Specific Roles of Anthraquinone Derivative and Polypyrrole Layer on Oxygen Reduction Reaction

“…Platinum [5], platinum-based alloys [6][7][8][9], other precious metals [10][11][12], carbon nanotubes [13,14] and metallorganic compound [15] have been widely used as electrocatalysts for the oxygen reduction reaction (ORR). These materials have high electroactivity and high efficiency, but also a high cost.…”