Abstract
The present work presents an investigation of the enantioselectivity of (111) and (100) faceted polycrystalline platinum and gold electrodes. Electrochemical faceting of these polycrystalline electrodes was carried out by application of a suitable square wave that induces preferential dissolution of some crystallographic planes. The chirality of the produced surfaces was investigated by testing the ability of the prepared surfaces to discriminate voltammetrically between some amino acids and sugar enantiomers upon adsorption at the above-mentioned surfaces. The results indicate that all the polycrystalline electrodes were achiral. Faceted platinum and gold electrodes, however, possess some chirality depending on the surface orientation. Pt(111) faceted electrodes were able to discriminate between enantiomers of the investigated phenylalanine and serine. Pt(100) faceted electrodes also were able to discriminate between the investigated enantiomers, but to a lower extent. Faceted gold electrodes showed a similar ability of discrimination between the investigated phenylalanine and serine enantiomers.
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References
Hazzazi, O.; Attard, G.; Wells, P.: Molecular recognition in adsorption and electro-oxidation at chiral platinum surfaces. J. Mol. Catal. A Chem. 216, 247–255 (2004)
Staden, R.; Stefan, V.; Nejem, R.: Enantioselective, potentiometric membrane electrodes based on cyclodextrins for the assay of L- and D-2-hydroxyglutaric acid. Anal. Lett. 38(12), 1847—1855 (2005)
Pfaltz, A.; Heinz, T.: Enantioselective hydrogenation of ethyl pyruvate over Pt/alumina: systematic variation of modifier structure. Topic Catal. 4, 229–239 (1997)
Ahmadi A., Attard G.: Surface reactivity at chiral platinum surfaces. Langmuire 15, 2420–2424 (1999)
Arvia, A.; Canullo, J.; Custidiano, E.; Perdriel, C.; Triaca, E.: Electrochemical faceting of metal electrodes. Electrochim. Acta. 31(11), 1359–1368 (1986)
Perdriel, C.; Arvia, A.: Electrochemical faceting of polycrystalline gold in 1 M H2SO4. J. Electroanal. Chem. 2115, 317–329 (1986)
Hourani, M.; Wieskowski, A.: Structural effects in heterogeneous electrocatalysis: electrohydrogenation of ethylene on preferentially oriented Platinum electrodes. Langmuire 6, 379–385 (1990)
Clavilier, J.; Faure, R.; Guinet, G, Durand, R.: Preparation of monocrystalline Pt microelecrodes and electrochemical study of the plane surfaces cut in the direction of the (111) and (110) planes. J. Electroanal. Chem. 107, 205–209 (1980)
Clavilier, J.; Armand, D.; Wu, B.: Electrochemical study of the nitial surface condition of platinum surface with (100) and (111) orientations. J. Electroanal. Chem. 135, 159–166 (1982)
Clavilier, J.; Faure, R.; Guinet, G, Durand, R.: Preparation of monocrystalline Pt microelecrodes and electrochemical study of the plane surfaces cut in the direction of the (111) and (110) planes. J. Electroanal. Chem. 107, 205–209 (1980)
Harata K.: Structural aspects of stereo differentiation in the solid state. Chem. Rev. 98, 1803–1827 (1998)
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Hourani, M.K., Abu Shmeis, R.M. An Investigation of Adsorption Enantioselectivity of Faceted Polycrystalline Platinum and Gold Electrodes. Arab J Sci Eng 39, 123–129 (2014). https://doi.org/10.1007/s13369-013-0872-y
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DOI: https://doi.org/10.1007/s13369-013-0872-y