Electrocatalytic Oxidation of Methanol at the Modified Glassy Carbon Electrode with Carbon Nanotubes, poly(4-methyl ortho phenylenediamine) Film and Nano-Particles of Copper Oxide in an Alkaline Solution

Document Type : Original Article

Authors

زنجان، دانشگاه زنجان، دانشکده علوم، گروه شیمی

Abstract

The present study demonstrates the electrocatalytic oxidation of methanol in an alkaline medium on the modified glassy carbon electrodes. A thin film of Cu-poly(4-methyl, 1, 2-di-amino benzene) on multi-walled carbon nanotubes (MWNTs) modified glassy carbon electrode was used as anode for electrooxidation of methanol in the alkaline medium. The electrochemical behavior and electrocatalytic activity of the electrode were characterized by using cyclic voltammetry. The modified glassy carbon electrode consisting of a thin film of poly(4-methyl, 1, 2-di-amino benzene) which was formed by electropolymerization process. The effects of various parameters such as copper concentration, time of electrodeposition, number of CVs for pretreatment of the modified electrode in an alkaline solution on the electrooxidation of methanol have been investigated and the optimum values of each factors were suggested. The anodic oxidation of methanol with the modified electrode occurred at 0.75 V vs. Ag/AgCl and the treatment of the voltammetric data showed it was a purely diffusion controlled reaction. The modified electrode exhibits good catalytic activity for the oxidation of methanol in the wide concentration range 0.21-0.4 M.

Keywords


[1]: سید احمد مظفری ، منوچهر بهمئی، پرستو مهدیان ، رضا رحمانیان، مجله علمی- پژوهشی شیمی کاربردی سال دهم، شماره 34 بهار 1394.
[2] Ojani R, Raoof JB, Hoseini Zavavarmahalleh SR (2008) Electrochim Acta 53:2402
[3] V.B. Oliveira, D.S. Falcão, C.M. Rangel, A.M.F.R. Pinto, Int. J. Hydrogen Energy., 32, 415 (2007).
[4] G.T. Burstein, C.J. Barnett, A.R. Kucernak, K.R. Williams, Aspects of the anodicoxidation of methanol, Catalysis Today 38 (1997) 425–437.
[5] M. Abrishamkar , S. N. Azizi, J. B. Raoof, Monatsh Chem (2012) 143:409–412
[6] Reza Ojani, Jahan-Bakhsh Raoof, Sayed Reza Hosseini Zavvarmahalleh Electrochimica Acta 53 (2008) 2402–2407
[7] T.R.I. Cataldi, E. Desimoni, G. Ricciardi, F. Lelj, Electroanalysis 7 (1995)435.
[8] Sh.J. Liu, Electrochim. Acta 49 (2004) 3235.
[9] M.H. Pournaghi-Azar, B. Habibi،Journal of Electroanalytical Chemistry 601 (2007) 53–62
[10] A. Gomes, M.I. da Silva Pereira ،Electrochimica Acta 52 (2006) 863–871.
[11] F. Jamali, J. Raoof, S.R. Hosseini, R. Ojani،Chemistry of Solid Materials 2  2013 pp.33-40
[12] A.P. Periasamy, J. Liu, H.-M. Linc, H.-T. Chang,  J. Mater. Chem. A, 1 (2013) 5973.
[13] R. Ojani, J-B. Raoof, Y. Ahmady-Khanghah, Electrochimica Acta 56 (2011) 3380–3386.
[14] A.M.Shams El Din, F.M.Abd El Wahab، Electrochimica Acta 9 1964, Pages 113–121
[16] S.Y. Xie, Z.J. Ma, C.F. Wang, S.C.Lin, Z.Y. Jiang, R.B. Huang, L.S.Zheng, J. Solid State Chem,177   2004, Pages 3743–3747
[17] G.M. Brisard, J.D. Rudnicki, F. Mclarnon, E.J. Cairns Electrochim. Acta., 40, 859 (1995).
[18] Allen J. Bard, Electrochemical Methods Fundamentals and Applications, seconded., John Wiley and Sons, New York, 2001. L.R.F.
[19] Seyed Karim Hassaninejad-Darzi • Mostafa Rahimnejad، J IRAN CHEM SOC (2014) 11:1047–1056
[20] F. Jamali, J. Raoof, S.R. Hosseini, R. Ojani, Chemistry of Solid Materials,  1 (2013) 33-40
[21] N. Ajami, International Journal of Materials Chemistry and Physics,  2 (2016) 22-27.
[22] Pariente F, Lorenzo E, Tobalina F, Abruna HD (1995) Anal Chem 67:3936–3944.