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.
Electrodeposition of Cu-Ni Alloy Electrodes with Bimodal Porosity and Their Use for Nitrate Reduction
Mattarozzi L;Cattarin S;Comisso N;Gerbasi R;Guerriero P;Musiani M;Verlato E
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
