Novel diamond microelectrode for pH sensing
authors Silva, EL; Bastos, AC; Neto, MA; Silva, RF; Ferreira, MGS; Zheludkevich, ML; Oliveira, FJ
nationality International
journal ELECTROCHEMISTRY COMMUNICATIONS
author keywords Diamond; pH-selective microelectrode; HFCVD; Galvanic cell
keywords GALVANIC CORROSION; ZN/STEEL COUPLE; HIGH-RESOLUTION; FILMS; ZN2+
abstract A novel diamond based solid-contact pH-selective microelectrode is reported in the paper for the first time. The diamond films were grown on top of sharp tungsten filaments by HFCVD (Hot Filament Chemical Vapor Deposition). The pH sensitivity of the electrode is achieved via oxygen-termination of the diamond surface with RF oxygen plasma. The MEs were calibrated by zero-current chronopotentiometry registering linearity in the pH 2-12 range. The performance of the diamond microelectrode was demonstrated mapping the pH distribution over corroding Zn-Fe model galvanic cell. (C) 2013 Elsevier B.V. All rights reserved.
publisher ELSEVIER SCIENCE INC
issn 1388-2481
year published 2014
volume 40
beginning page 31
ending page 34
digital object identifier (doi) 10.1016/j.elecom.2013.12.007
web of science category Electrochemistry
subject category Electrochemistry
unique article identifier WOS:000332356600009
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journal impact factor 4.660
5 year journal impact factor 4.534
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