Nano-Electrochemical Detection of Hydrogen or Protons Using Palladium Nanoparticles: Distinguishing Surface and Bulk Hydrogen

The benefits of using nanoparticle‐modified electrodes are exemplified through the electrochemical detection of protons and/or hydrogen. It is shown that a palladium‐nanoparticle‐modified boron‐doped diamond allows voltammetric information relating to the relative roles played by the surface and the...

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Bibliographic Details
Published in:Chemphyschem 2006-05, Vol.7 (5), p.1081-1085
Main Authors: Batchelor-McAuley, Christopher, Banks, Craig E., Simm, Andrew O., Jones, Timothy G. J., Compton, Richard G.
Format: Article
Language:English
Subjects:
Chemistry
Colloidal state and disperse state
electrocatalysis
Electrochemistry
Exact sciences and technology
General and physical chemistry
hydrogen
Kinetics and mechanism of reactions
nanoparticles
palladium
Physical and chemical studies. Granulometry. Electrokinetic phenomena
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Summary:The benefits of using nanoparticle‐modified electrodes are exemplified through the electrochemical detection of protons and/or hydrogen. It is shown that a palladium‐nanoparticle‐modified boron‐doped diamond allows voltammetric information relating to the relative roles played by the surface and the bulk metal to be obtained for the proton–hydrogen system at palladium surfaces which is not accessible using palladium macroelectrodes or microelectrodes. A deeper insight into the Pd/H2/H+ system: The electrochemical response of a palladium‐nanoparticle‐modified boron‐doped diamond (BDD) electrode for the electrochemical detection of protons and/or hydrogen (see cyclic voltammogram for the reduction of PdCl2 in H2SO4 at a BDD electrode) is explored. The roles played by the surface‐ and bulk‐absorbed hydrogen, which cannot be observed at palladium macro‐ or microelectrodes, are identified.
ISSN:1439-4235
1439-7641
DOI:10.1002/cphc.200500571