Electrocatalitic behaviour of serpentinite modified carbon paste electrode
Abstract
Electrochemistry of carbon paste electrode which contained serpentinite powder and graphite in 1:1 weight ratio was examined in three-electrode cell regarding its electrocatalytic and sensing properties. For this purpose, red-ox reactions of potassium ferrocyanide in aqueous solutions as benchmark media and pesticide tebufenozide (TBF) were examined. Serpentinite characterization performed by XRPD, SEM/EDX, and FTIR confirmed the structure typical for this mineral rock. Voltammetric analyses have in all cases shown that serpentinite modified carbon paste electrode (S-CPE) possess superior electrocatalytic activity in contrast to bare CPE for the red-ox reactions of K-4[Fe(CN)(6)]. The enlargement of the peak currents, higher electroactive surface area, and the decline of the peak-to-peak separation are a proof of reversible and faster electron transfer kinetics for S-CPE. The effect of pH on the electrochemical behaviour of TBF was investigated in Britton-Robinson buffer solutions in r...ange from 2.0 to 7.0 and showed the best analytical performance at pH 5.0. The oxidation peak of TBF appeared at + 0.5 V vs. Ag/AgCl under conditions optimized for the determination of TBF in the differential pulse stripping voltammetry: initial potential + 0.1 V, end potential + 0.9 V, accumulation potential -0.35 V, accumulation time 120 s, and the scan rate 50 my s(-1).
Keywords:
Serpentinite / Carbon paste electrode / Potassium ferrocyanide / Tebufenozide / VoltammetrySource:
Journal of Electroanalytical Chemistry, 2017, 801, 338-344Funding / projects:
- Advanced technologies for monitoring and environmental protection from chemical pollutants and radiation burden (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-43009)
- Physics and Chemistry with Ion Beams (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45006)
- Development and characterization of novel biosorbent for natural and waste water treatment (RS-MESTD-Technological Development (TD or TR)-34008)
DOI: 10.1016/j.jelechem.2017.08.011
ISSN: 1572-6657; 1873-2569
WoS: 000411847500043
Scopus: 2-s2.0-85026899806
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VinčaTY - JOUR AU - Ranđelović, Marjan S. AU - Momčilović, Milan Z. AU - Nikolić, Goran AU - Đorđević, Jelena S. PY - 2017 UR - https://vinar.vin.bg.ac.rs/handle/123456789/1754 AB - Electrochemistry of carbon paste electrode which contained serpentinite powder and graphite in 1:1 weight ratio was examined in three-electrode cell regarding its electrocatalytic and sensing properties. For this purpose, red-ox reactions of potassium ferrocyanide in aqueous solutions as benchmark media and pesticide tebufenozide (TBF) were examined. Serpentinite characterization performed by XRPD, SEM/EDX, and FTIR confirmed the structure typical for this mineral rock. Voltammetric analyses have in all cases shown that serpentinite modified carbon paste electrode (S-CPE) possess superior electrocatalytic activity in contrast to bare CPE for the red-ox reactions of K-4[Fe(CN)(6)]. The enlargement of the peak currents, higher electroactive surface area, and the decline of the peak-to-peak separation are a proof of reversible and faster electron transfer kinetics for S-CPE. The effect of pH on the electrochemical behaviour of TBF was investigated in Britton-Robinson buffer solutions in range from 2.0 to 7.0 and showed the best analytical performance at pH 5.0. The oxidation peak of TBF appeared at + 0.5 V vs. Ag/AgCl under conditions optimized for the determination of TBF in the differential pulse stripping voltammetry: initial potential + 0.1 V, end potential + 0.9 V, accumulation potential -0.35 V, accumulation time 120 s, and the scan rate 50 my s(-1). T2 - Journal of Electroanalytical Chemistry T1 - Electrocatalitic behaviour of serpentinite modified carbon paste electrode VL - 801 SP - 338 EP - 344 DO - 10.1016/j.jelechem.2017.08.011 ER -
@article{ author = "Ranđelović, Marjan S. and Momčilović, Milan Z. and Nikolić, Goran and Đorđević, Jelena S.", year = "2017", abstract = "Electrochemistry of carbon paste electrode which contained serpentinite powder and graphite in 1:1 weight ratio was examined in three-electrode cell regarding its electrocatalytic and sensing properties. For this purpose, red-ox reactions of potassium ferrocyanide in aqueous solutions as benchmark media and pesticide tebufenozide (TBF) were examined. Serpentinite characterization performed by XRPD, SEM/EDX, and FTIR confirmed the structure typical for this mineral rock. Voltammetric analyses have in all cases shown that serpentinite modified carbon paste electrode (S-CPE) possess superior electrocatalytic activity in contrast to bare CPE for the red-ox reactions of K-4[Fe(CN)(6)]. The enlargement of the peak currents, higher electroactive surface area, and the decline of the peak-to-peak separation are a proof of reversible and faster electron transfer kinetics for S-CPE. The effect of pH on the electrochemical behaviour of TBF was investigated in Britton-Robinson buffer solutions in range from 2.0 to 7.0 and showed the best analytical performance at pH 5.0. The oxidation peak of TBF appeared at + 0.5 V vs. Ag/AgCl under conditions optimized for the determination of TBF in the differential pulse stripping voltammetry: initial potential + 0.1 V, end potential + 0.9 V, accumulation potential -0.35 V, accumulation time 120 s, and the scan rate 50 my s(-1).", journal = "Journal of Electroanalytical Chemistry", title = "Electrocatalitic behaviour of serpentinite modified carbon paste electrode", volume = "801", pages = "338-344", doi = "10.1016/j.jelechem.2017.08.011" }
Ranđelović, M. S., Momčilović, M. Z., Nikolić, G.,& Đorđević, J. S.. (2017). Electrocatalitic behaviour of serpentinite modified carbon paste electrode. in Journal of Electroanalytical Chemistry, 801, 338-344. https://doi.org/10.1016/j.jelechem.2017.08.011
Ranđelović MS, Momčilović MZ, Nikolić G, Đorđević JS. Electrocatalitic behaviour of serpentinite modified carbon paste electrode. in Journal of Electroanalytical Chemistry. 2017;801:338-344. doi:10.1016/j.jelechem.2017.08.011 .
Ranđelović, Marjan S., Momčilović, Milan Z., Nikolić, Goran, Đorđević, Jelena S., "Electrocatalitic behaviour of serpentinite modified carbon paste electrode" in Journal of Electroanalytical Chemistry, 801 (2017):338-344, https://doi.org/10.1016/j.jelechem.2017.08.011 . .