Sains Malaysiana 38(6)(2009): 873–876

Electrochemical Oxidation of Propionaldehyde and Butyraldehyde on a Gold Electrode

(Pengoksidaan Elektrokimia Propionaldehid dan Butiraldehid pada Elektrod Emas)

Amirah Ahmad & Mohamed Rozali Othman*

School of Chemical Sciences and Food Technology

Faculty of Science and Technology

Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor D.E., Malaysia

Diserahkan: 13 Januari 2009 / Diterima: 15 April 2009

ABSTRACT

The electrooxidation of propionaldehyde and butyraldehyde on a gold electrode was studied by cyclic voltammetry in alkaline media. Electrooxidation of both aldehydes showed the appearance of two anodic peaks. Another oxidation peak on a newly generated electrode surface was observed after the corresponding reduction peak for both aldehydes.

Keywords: Butyraldehyde; cyclic voltammetry; gold electrode; propionaldehyde

ABSTRAK

Pengoksidaan elektrokimia propionaldehid dan butiraldehid pada elektrod kepingan emas dikaji melalui kitar voltamogram dalam larutan elektrolit alkali. Pengoksidaan elektrokimia kedua-dua aldehid menunjukkan kehadiran dua puncak anodik. Puncak anodik kedua hadir semasa imbasan keupayaan negatif pada permukaan elektrod terjana semula selepas tindak balas penurunan berlaku.

Kata kunci: Butiraldehid; elektrod emas; voltametri berkitar; propionaldehid

RUJUKAN

Avramov-Ivić, M., Jovanović, V., Vlajnić, G. & Popić, J. 1997. The electrocatalytic properties of the oxides of noble metals in the electro-oxidation of some organic molecules. Journal of Electroanalytical Chemistry 423: 119-124.

Beden, B., Leger, J.M. & Lamy, C. 1992. In Modern aspects of electrochemistry, edited by J.O’M Bockris, B.E. Conway, R.E White. New york: Plenum Press.

Borkowska, Z., Tymosiak-Zielinska, A. & Shul, G. 2004. Electroxidation of methanol on polycrystalline and single crystal gold electrodes. Electrochimica acta 49: 1209-1220.

Bover, W.J. & Zuman, P. 1975. Electro-oxidation of organic compounds 1 Oxidation of benzaldehydes at the dropping Mercury Electrodes.  Journal of Electrochemical Society 122: 368.

Burke, L.D. & Nugent, P.F. 1998. Multicomponent hydrous oxide films grown on gold in acid solution. Journal of Electroanalytical Chemistry 444: 19-29.

Burke, L.D. & Ryan, T.G. 1992. The role of incipient hydrous oxides in the oxidation of glucose and some of its derivatives in aqueous media. Electrochimica Acta 37: 1363-1370.

Burke, L.D., Collins, J.A., Horgan, M.A., Hurley, L.M. & O’Mullane, A.P. 2000. The importance of the active states of surface atoms with regard to the electrocatalytic behaviour of metal electrodes in aqueous media. Electrochimica Acta 45: 4127-4134.

Camara, G.A., de Lima, R.B. & Iwasita, T. 2004. Catalysis of ethanol electrooxidation by PtRu: The influence of catalysts composition. Electrochemistry Communications 6: 812-815.

Casella, I.G. & Contursi, M. 2006. Characterization of bismuth adatom-modified palladium electrodes The electrocatalytic oxidation of aliphatic aldehydes in alkaline solutions. Electrochimica Acta 52: 649-657.

Castro Luna, A.M., de Mele, M.F.L. & Arvia, A.J. 1992. The electro-oxidation of glucose on microcolumnar gold electrodes in different neutral solutions. Journal of Electroanalytical Chemistry 323: 149-162.

Chen, A. & Lipkowski, J. 1999. Electrochemical and spectroscopic studies of hydroxide adsorption at the Au(111) electrode. J. Phys. Chem. B 103: 682

Chen, S., Wu, B. & Cha, C. 1997. An EQCM investigation of oxidation of formic acid at gold electrode in sulfuric acid solution. Journal of Electroanalytical Chemistry 431:243-247.

Chen, S. & Schell, M. 2000. Excitability and multistability in the electrochemical oxidation of primary alcohols. Electrochimica Acta 45: 3069-3080.

Hitmi, H., Belgsir, E.M., Leger, J.M., Lamy, C. & Lezna, R.O., 1994. A kinetic analysis of the electrooxidation of ethanol at a platinum electrode in acid medium. Electrochimica Acta 39: 407-415.

Koper, M.T.M. & van Santen, R.A. J. 1999. Interaction of H, O and OH with metal surfaces. Electroanal Chem. 472: 126.

Manouŝek, O. & Volke, J. 1973. Anodic oxidation of aromatic aldehydes at mercury electrodes. Journal of Electroanalytical Chemistry 43: 365-375.

Marichev, V.A. 1998. The adsorption of hydroxide ions on metals. Electrochimica Acta 43: 2203.

Merck Index. 1989. Merck Index. 11th ed. Merck & Co, Inc. Rahway: New Jersey.

Larew, L.A & Johnson, D.C. 1989. Concentration dependence of the mechanism of glucose oxidation at gold electrodes in alkaline media. Journal of Electroanalytical Chemistry 262: 167-182.

Pereira, M.G., Jimenez, M.D., Elizalde, M.P., Robledo, A.M. & Vante, N.A. 2004. Study of the electrooxidation of ethanol on hydrophobic electrodes by DEMS and HPLC. Electrochimica Acta 49: 3917-3925.

Pineda, T., Sevilla, J.M., Rom‡n & Bl‡zquez, M. 2000. Electrooxidation of pyridoxal (PL) on a polycrystalline gold electrode in alkaline solutions. Journal of Electroanalytical Chemistry 492: 38-45.

Riyanto, Jumat Salimon & Mohamed Rozali Othman. 2007. Perbandingan hasil pengoksidaan elektrokimia etanol dalam larutan alkali yang menggunakan elektrod platinum-polivinilklorida (Pt-PVC) dan kepingan logam Pt. Sains Malaysiana 36: 175-181.

Sibille, S., Moiroux, J., Marot, J.C. & Deycard, S. 1978. Oxydation électrochimique des aldéhydes en solution aqueuse I. Oxydation de solutions aqueuses basiques d’aldéhydes à des électrodes d’or et de platine Journal of Electroanalytical Chemistry 88: 105.

Tateishi, N., Nishimura, K., yahikozawa, K., Nakagawa, M., Yamada, M. & Takasu, Y. J. 1993. Electrocatalytic properties of ultrafine gold particles towards oxidation of acetaldehyde and ethanol. Electroanal. Chem. 352: 243.

Tominaga, M., Nagashima, M. & Taniguchi, I. 2007. Controlled-potential electrosynthesis of glucosaminic acid from glucosamine at a gold electrode. Electrochem. Comm. 9: 911-914.

Van Effen, R.M., Hui, B.S. & Evans, D.H.1982. Oxidation of halogenated benzaldehydes at aurized gold anodes Journal of Electroanalytical Chemistry 135: 76.

Wang, M.L., Zhang, Y.Y., Xie, Q.J. & Yao, S.Z. 2005. In situ FT-IR spectroelectrochemical study of electrooxidation of pyridoxol on a gold electrode. Electrochimica Acta 51: 1059-1068.

*Pengarang untuk surat-menyurat; email: rozali@ukm.my