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). p. 1283. 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 H2 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 H2 oxidation was studied, while the latter mode allowed mapping of the distribution of local [H2] 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 06:07|
|Last Modified:||19 Oct 2010 06:07|
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