Cu-Ni alloy layers with a bimodal porosity - a spongy material made of submicron dendrites, featuring macroscopic pores tens of microns large - can be deposited from baths containing the metal ions, sodium citrate and ammonium sulfate, using large current densities (-3 A cm-2) producing vigorous hydrogen evolution. Alloys with a broad range of compositions are obtained using baths with different Cu(II)/Ni(II) concentration ratios. Voltammetric experiments of nitrate reduction at compact and porous Cu-Ni RDEs show, in the latter case, lower overvoltage and higher peak currents, resulting from enhanced transport and improved catalytic activity. © 2013 The Electrochemical Society.
Electrodeposition of Cu-Ni alloy electrodes with bimodal porosity and their use for nitrate reduction / Mattarozzi, Luca; Cattarin, Sandro*; Comisso, Nicola; Gerbasi, Rosalba; Guerriero, Paolo; Musiani, Marco; Vázquez-Gómez, Lourdes; Verlato, Enrico. - In: ECS ELECTROCHEMISTRY LETTERS. - ISSN 2162-8726. - ELETTRONICO. - 2:11(2013), pp. D58-D60. [10.1149/2.004311eel]
Electrodeposition of Cu-Ni alloy electrodes with bimodal porosity and their use for nitrate reduction
Verlato, Enrico
2013
Abstract
Cu-Ni alloy layers with a bimodal porosity - a spongy material made of submicron dendrites, featuring macroscopic pores tens of microns large - can be deposited from baths containing the metal ions, sodium citrate and ammonium sulfate, using large current densities (-3 A cm-2) producing vigorous hydrogen evolution. Alloys with a broad range of compositions are obtained using baths with different Cu(II)/Ni(II) concentration ratios. Voltammetric experiments of nitrate reduction at compact and porous Cu-Ni RDEs show, in the latter case, lower overvoltage and higher peak currents, resulting from enhanced transport and improved catalytic activity. © 2013 The Electrochemical Society.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
