Ahmed , S. and Shan , J. and Petrik , L. and Linkov , V. A. (2004) Scanning electrochemical microscopic study of hydrogen oxidation and evolution at electrochemically deposited Pt nanoparticulate electrode incorporated in polyaniline. ANALYTICAL SCIENCES, 20 (9). 1283-1287 . ISSN 0910-6340
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Official URL: http://www.jstage.jst.go.jp/article/analsci/20/9/2...
Scanning Electrochemical Microscopy (SECM) feedback mode and substrate generation-tip collection (SG-TC) mode coupled with chronoamperometric approach were used to investigate H-2 oxidation and hydrogen evolution reaction (HER) at a polyaniline (PAni) coated highly oriented pyrolytic graphite (HOPG) electrode. Using the former mode, the heterogeneous electron transfer (ET) kinetics for H-2 oxidation was studied, while the latter mode allowed mapping of the distribution of local [H-2] at the nanoparticulate/aqueous interface, followed by monitoring the transients at the tip. These preliminary studies demonstrate that SECM is useful in evaluating the activity of nanophase electrocatalysts. Particularly, if one employs nanometer-sized tips or hydrodynamic microjet electrodes where the mass transfer rate is significantly high, it should be possible to investigate the ET kinetics more accurately.
|Subjects:||Physical Science > Nanophysics|
Physical Science > Nano objects
Material Science > Nanochemistry
Material Science > Nanostructured materials
|Divisions:||Faculty of Engineering, Science and Mathematics > School of Physics|
Faculty of Engineering, Science and Mathematics > School of Chemistry
|Deposited On:||19 Oct 2010 09:45|
|Last Modified:||19 Oct 2010 09:45|
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