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Inhibiting effect of acetonitrile on oxygen reduction on polycrystalline pt electrode in sodium chloride solution

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2012
2594.pdf (561.5Kb)
Authors
Smiljanić, Milutin
Srejić, Irina
Marinović, Vedrana
Rakočević, Zlatko Lj.
Štrbac, Svetlana
Article (Published version)
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Abstract
The oxygen reduction reaction (ORR) was studied on the polycrystalline Pt electrode in 0.1 M NaCl electrolyte containing various amounts of acetonitrile (AcN). The state of the electrode surface was characterized by the cyclic voltammetry in oxygen free electrolytes, while ORR studies were performed on the polycrystalline Pt rotating disc electrode by the linear sweep voltammetry in oxygen saturated electrolytes. The acetonitrile is chemisorbed on Pt over a wide potential range, inhibiting both hydrogen adsorption and oxide formation. The extent of AcN chemisorption depends on its concentration in the solution. Initial potential of oxygen reduction is shifted negatively, while the ORR current is increasingly reduced with the increase of AcN concentration. Complete inhibition of ORR in the potential range of AcN and Cl-anion coadsorption is achieved for (0.1 M NaCl + 1 M AcN) solution.
Keywords:
oxygen reduction / platinum / acetonitrile / chloride anions / rotating disc electrode
Source:
Hemijska industrija, 2012, 66, 3, 327-333
Publisher:
  • Belgrade : Association of the Chemical Engineers of Serbia
Projects:
  • Functional, Functionalized and Advanced Nanomaterials (RS-45005)

DOI: 10.2298/HEMIND111010097S

ISSN: 0367-598X (Print); 2217-7426 (Online)

WoS: 000310493000005

Scopus: 2-s2.0-84865632850
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URI
http://dais.sanu.ac.rs/123456789/259
http://cer.ihtm.bg.ac.rs/handle/123456789/2596
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