Lietuvos mokslų akademijos Leidybos skyrius
    Tel. +370 5 2626851, +370 5 2613620 El. paštas leidyba@lma.lt
Chemija / Chemistry

ISSN 0235-7216
ISSN 2424-4538 (online)

2012 m. Nr. 3

A comparative electrooxidation study on simply prepared nanoparticles in acidic and alkaline media
Mohammad ETESAMI, Norita MOHAMED

Monometallic and bimetallic nanoparticles of Au, Pd, Pt, (gold-palladium) AuPd and
(gold-platinum) AuPt were electrodeposited potentiostatistically on pencil graphite (PG) by applying a constant potential of –0.2 V vs. Ag/AgCl (3 M KCl) in an acidic electrolyte. A scanning electron microscope equipped with energy dispersive X-ray spectroscopy (SEMEDX) and high resolution X-ray diffraction (XRD) which were used for characterization of the fabricated electrodes confirmed that the metallic and bimetallic deposits have nanoscale dimensions. The fabricated electrodes beside the bare PG were used in a comparative study in acidic and alkaline media. Most common fuels that have been used in fuel cells such as the first n-alkanols (C1–C4), 2-propanol, the simplest diol (ethylene glycol), triol (glycerol), polyol (D-glucose), aldehyde (formaldehyde), carboxylic acid (formic acid) and benzyl alcohol have been used in this work. The highest catalytic activity was recorded for the electrooxidation of formic acid on PtNPs/PG (0.62 mA cm–2) and AuPtNPs/PG (0.33 mA cm–2) in the acidic medium while the highest current density was achieved in the alkaline medium for 1-propanol by using AuPtNPs/PG (24 mA cm–2) and AuPdNPs/PG (25 mA cm–2) electrodes.

Keywords: metallic electrocatalysts, electrooxidation, fuel, acidic medium, alkaline medium

Issues:

2017 - Vol.28
No. 1, No. 2, No. 3, No. 4

2016 - Vol.27
No. 1, No. 2, No. 3, No. 4

2015 - Vol.26
No. 1, No. 2, No. 3, No. 4

2014 - Vol.25
No. 1, No. 2, No. 3, No. 4

2013 - Vol.24
No. 1, No. 2, No. 3, No. 4

2012 - Vol.23
No. 1, No. 2, No. 3, No. 4

2011 - Vol.22
No. 1, No. 2, No. 3, No. 4

2010 - Vol.21
No. 1, No. 2-4

2009 - Vol.20
No. 1, No. 2, No. 3, No. 4

2008 - Vol.19
No. 1, No. 2, No. 3-4

2007 - Vol.18
No. 1, No. 2, No. 3, No. 4

2006 - Vol.17
No. 1, No. 2-3, No. 4

2005 - Vol.16
No. 1, No. 2, No. 3-4

2004 - Vol.15
No. 1, No. 2, No. 3, No. 4

2003 - Vol.14
No. 1, No. 2, No. 3, No. 4

2002 - Vol.13
No. 1, No. 2, No. 3, No. 4

2001 - Vol.12
No. 1, No. 2, No. 3, No. 4