Journal
ANALYTICA CHIMICA ACTA
Volume 888, Issue -, Pages 52-58Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.aca.2015.07.014
Keywords
Bipolar electrochemistry; Bipolar electrodes array; Electrocatalyst screening; Digital versatile disc; Visual sensing; Hydrogen evolution reaction
Categories
Funding
- University of Isfahan
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This work represents a new, extremely low cost and easy method for fabrication of bipolar electrode (BPE) for rapid and simultaneous screening of potential candidates for electrocatalytic reactions and sensing applications. Our method takes advantage of the silver reflective layer deposited on already available recordable digital versatile disc (DVD-R) polycarbonate substrate which acts as BPE. Oxidation of the reflective layer of the DVD-R in anodic pole of the BPE results in a permanent and visually measurable dissolute length. Therefore, one could correlate the electrocatalytic activity of the catalyst at the cathodic pole of the BPE, as well as the concentration of analyte in the solution, to the dissolution length of the BPE. To illustrate the promising applications of this new substrate as BPE, p-benzoquinone (BQ) and hydrogen peroxide were tested as model targets for the sensing application. Moreover, in order to show the feasibility of using DVD BPEs for screening applications, the electrocatalytic activity of Pt, Pd, Au, and pristine DVD substrate toward hydrogen evolution reaction (HER) were compared using an array of BPEs prepared on DVD substrate. (C) 2015 Elsevier B.V. All rights reserved.
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