CHARACTERIZATION OF A MODIFIED GRAPHITE ELECTRODE OBTAINED BY HEMIN ELECTROPOLYMERISATION

Graziella Liana TURDEAN

CHARACTERIZATION OF A MODIFIED GRAPHITE ELECTRODE OBTAINED BY HEMIN ELECTROPOLYMERISATION

Authors

Graziella Liana TURDEAN Faculty of Chemistry and Chemical Engineering, Research Center of Electrochemistry and Nonconventional Materials, Babeş-Bolyai University, Cluj-Napoca, Romania. Email: gturdean@chem.ubbcluj.ro. https://orcid.org/0000-0003-1273-6878

Keywords:

iron (III) protoporphyrin (IX), linear sweep voltammetry, hydrogen peroxide, nitrite

Abstract

A new modified electrode (G/polyHm) was obtained by electropolymerisation of iron (III) protoporphyrin (IX) (hemin, Hm) at the surface of a graphite electrode (G), by repetitive scanning the potential between -0.85 and 0 V vs. Ag/AgCl,KCl_sat. The cathodic peak revealed by linear sweep voltammetry at the electrode in phosphate buffer, pH 8, corresponds to one electron transfer process occurring at the Hemin(Fe³⁺)/ Hemin(Fe²⁺) metallic center of the immobilized hemin. All the estimated electrochemical parameters are in accordance with the values reported for immobilized hemin. The electrode exhibits electrocatalytic properties towards the H₂O₂ and NO₂^- reduction, respectively, proving an enzyme-like behaviour of the immobilised hemin, characterised by hyperbolic Michaelis Menten behaviour, when increasing concentrations of substrate were added, irrespective of the scan rate used.

References

J.-M. Zen, A.S. Kumar, D.-M. Tsai, Electroanalysis, 2003, 15, 1073.

J.A. Bennett, K.L. Sterling, and J.E. Pander III, ECS Electrochemistry Letters, 2013, 2, H37-H39.

A. Eftekhari, Analytical Letters, 2001, 34(4), 541.

R.A. Durst, A.J. Bäumner, R.W. Murray, R.P. Buck, C.P. Andrieux, Pure Applied Chemistry, 1997, 69, 1317.

J. Labuda, M. Vanícková, M. Bučková, E. Korgová, Chemical Papers, 2000, 54(2), 95.

K.L. Brown, S.B. Gray, International Journal of Chemistry, 2010, 2, 3, http://ccsenet.org/ijc.

A.A. Ciucu, Journal Biosensors & Bioelectronics, 2014, 5, 154, http://dx.doi.org/10.4172/2155-6210.1000154.

V.S. Vasantha, S.-M. Chen, Journal of the Electrochemical Society, 2005, 152, D151.

S.F. Peteu, T. Bose, M. Bayachou, Analytica Chimica Acta, 2013, 780, 81.

H.L. Zou, B.L. Li, H.Q. Luo, N.B. Li, Sensors and Actuators B, 2015, 207, 535.

R. Carballo, A.L. Rinaldi, P.C. Dabas, I.N. Rezzano, Bioelectrochemistry, 2015, 104, 51.

H. Song, Y. Ni, S. Kokot, Analytica Chimica Acta, 2013, 788, 24.

G.L. Turdean, I.C. Popescu, A. Curulli, G. Palleschi, Electrochimica Acta, 2006, 51, 6435.

G.M. Mares, G.L. Turdean, I.C. Popescu, Studia UBB Chemia, 2013, 58, 105.

G.L. Turdean, C. Fărcaş, A.F. Palcu, M.S. Turdean, Studia UBB Chemia, 2008, 53, 105.

A. Fagan-Murphy, M.C. Allen, B.A. Patel, Electrochimica Acta, 2015, 152, 249.

J.N. Younathan, K.S. Wood, T.J. Meyer, Inorganic Chemistry, 1992 31, 3280.

A.J. Bard, L.R. Faulkner, “Electrochemical Methods”, Wiley-VCH, New York, 2001, p. 231.

P.C. Pandey, B. Singh, R.C. Boro, C.R. Suri, Sensors and Actuators B, 2007,122, 30.

Y. Zhang, Z. Xia, H. Liu, M. Yang, L. Lin, Q. Li, Sensors and Actuators B, 2013, 188, 496.

D. Mimica, J.H. Zagal, F. Bedioui, Electrochemistry Communications, 2001, 3, 435.

T. Lotzbeyer, W. Schuhmann, H.-L. Schmidt, Bioelectrochemistry and Bioenergetics, 1997, 42, 1.

STUDIA UBB CHEMIA, Volume 60 (LX), No. 3, September 2015

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Published

2015-09-30

How to Cite

TURDEAN, G. L. (2015). CHARACTERIZATION OF A MODIFIED GRAPHITE ELECTRODE OBTAINED BY HEMIN ELECTROPOLYMERISATION. Studia Universitatis Babeș-Bolyai Chemia, 60(3), 119–128. Retrieved from https://studia.reviste.ubbcluj.ro/index.php/chemia/article/view/8472