caa a22 4500 47705076X CHVBK 20180405111339.0 cr unu---uuuuu 170330e19960401xx s 000 0 eng 10.1007/BF00251329 doi (NATIONALLICENCE)springer-10.1007/BF00251329 A novel procedure in the galvanic deposition of Zn alloys for the preparation of large area Ni and Ni-Co surfaces [Elektronische Daten] [S. Machado, J. Tiengo, P. De Lima Neto, L. Avaca] A new methodology for the electrodeposition of Ni-Zn and Ni-Co-Zn alloys that prevents zinc being in contact with the substrate and allows total elimination of this metal during alkaline leaching is fully described. This is achieved by a careful control of the plating bath composition during the electrolysis. The resulting coatings show a multilayer structure and the desirable concentration profile for all the metallic species involved, as revealed by SEM and EDX analyses. The electrochemical active area of the deposits after leaching of the zinc was measured by cyclic voltammetry. They were of the order of 1100 and 4400 times the geometric area for Ni and Ni-Co, respectively. These highly porous structures are very active for hydrogen evolution in alkaline solutions, showing extremely low overpotentials for relatively high current densities, as well as good stability for long term operation. Other possible applications for these structures are briefly discussed. Chapman & Hall, 1996 Machado S. Departamento de Fisico-Química, Instituto de Química de São Carlos - USP, C.P. 780, 13560-970, São Carlos-SP, Brazil aut Tiengo J. Departamento de Fisico-Química, Instituto de Química de São Carlos - USP, C.P. 780, 13560-970, São Carlos-SP, Brazil aut De Lima Neto P. Departamento de Fisico-Química, Instituto de Química de São Carlos - USP, C.P. 780, 13560-970, São Carlos-SP, Brazil aut Avaca L. Departamento de Fisico-Química, Instituto de Química de São Carlos - USP, C.P. 780, 13560-970, São Carlos-SP, Brazil aut Journal of Applied Electrochemistry Kluwer Academic Publishers 26/4(1996-04-01), 431-437 0021-891X 26:4<431 1996 26 10800 https://doi.org/10.1007/BF00251329 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00251329 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Machado S. Departamento de Fisico-Química, Instituto de Química de São Carlos - USP, C.P. 780, 13560-970, São Carlos-SP, Brazil aut NATIONALLICENCE 700 1- Tiengo J. Departamento de Fisico-Química, Instituto de Química de São Carlos - USP, C.P. 780, 13560-970, São Carlos-SP, Brazil aut NATIONALLICENCE 700 1- De Lima Neto P. Departamento de Fisico-Química, Instituto de Química de São Carlos - USP, C.P. 780, 13560-970, São Carlos-SP, Brazil aut NATIONALLICENCE 700 1- Avaca L. Departamento de Fisico-Química, Instituto de Química de São Carlos - USP, C.P. 780, 13560-970, São Carlos-SP, Brazil aut NATIONALLICENCE 773 0- Journal of Applied Electrochemistry Kluwer Academic Publishers 26/4(1996-04-01), 431-437 0021-891X 26:4<431 1996 26 10800 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer