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Chiral catalytic activities in magnetoelectrochemical etching

R. Aogaki1, 8 - R. Morimoto2 - M. Asanuma3 - I. Mogi4 - A. Sugiyama5 - M. Miura6 - Y. Oshikiri7 - Y. Yamauchi8

1 Polytechnic University, 2-20-12-1304, Ryogoku, Sumida-ku, Tokyo 130-0026, Japan
2 Saitama Prefectural Showa Water Filtration Plant, 100 Shinjukushinden, Kasukabe, Saitama 344-0113, Japan
3 Yokohama Harbour Polytechnic College, 1 Honmokufuto, Naka-ku, Yokohama 231-0811, Japan
4 Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
5 Institute for Nanoscience and Nanotechnology, Waseda University, 513 Waseda-tsurumaki-cho, Shinjuku-ku, Tokyo 162-0041, Japan
6 Hokkaido Polytechnic College, 3-190 Zenibako, Otaru, Hokkaido 047-0292, Japan
7 Yamagata College of Industry and Technology, 2-2-1 Matsuei, Yamagata-shi, Yamagata 990-2473, Japan
8 National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan

Chiral catalytic activities of electrode surfaces fabricated by magnetoelectrochemical etching without oxygen adsorption in a vertical magnetohydrodynamic (MHD) flow have been theoretically examined. Then, the following points were clarified: under anionic specific adsorption, such activities arise from the screw dislocations of 2D pits. Their chirality is donated by microscopic vortexes termed micro-MHD flows, which are formed on the free surfaces covered with ionic vacancies. As a result, under upward (+) and downward (--) magnetic fields, D (dextrorotatory)- and L (levorotatory)-activities appear, respectively. Figs 11, Refs 12.

Magnetohydrodynamics 51, No. 2, 353-360, 2015 [PDF, 1.37 Mb]

Copyright: Institute of Physics, University of Latvia
Electronic edition ISSN 1574-0579
Printed edition ISSN 0024-998X