Cu-Rh alloys have been electrodeposited from sulfate solutions, pH 3.4. Although Rh is more noble than Cu, the reduction peak of Rh3 +was ca. 0.4 V more negative than that of Cu2 +. Therefore, the Rh/Cu ratio in the deposited alloys, determined by EDS analyses, increased as the deposition potential became more negative. XRD analyses showed that the deposited alloys were polycrystalline and suggested that metastable CuxRh1 - xsolid solutions were formed for 0.1 ≤ x ≤ 0.8, although for such compositions a miscibility gap is known to exist. The Cu-Rh alloys were tested as cathodes for the reduction of nitrates and found to have significant catalytic activity. © 2012 Elsevier B.V.
Electrodeposition of Cu-Rh alloys and their use as cathodes for nitrate reduction / Comisso, Nicola; Cattarin, Sandro; Fiameni, Stefania; Gerbasi, Rosalba; Mattarozzi, Luca; Musiani, Marco*; Vázquez-Gómez, Lourdes; Verlato, Enrico. - In: ELECTROCHEMISTRY COMMUNICATIONS. - ISSN 1388-2481. - ELETTRONICO. - 25:1(2012), pp. 91-93. [10.1016/j.elecom.2012.09.026]
Electrodeposition of Cu-Rh alloys and their use as cathodes for nitrate reduction
Verlato, Enrico
2012
Abstract
Cu-Rh alloys have been electrodeposited from sulfate solutions, pH 3.4. Although Rh is more noble than Cu, the reduction peak of Rh3 +was ca. 0.4 V more negative than that of Cu2 +. Therefore, the Rh/Cu ratio in the deposited alloys, determined by EDS analyses, increased as the deposition potential became more negative. XRD analyses showed that the deposited alloys were polycrystalline and suggested that metastable CuxRh1 - xsolid solutions were formed for 0.1 ≤ x ≤ 0.8, although for such compositions a miscibility gap is known to exist. The Cu-Rh alloys were tested as cathodes for the reduction of nitrates and found to have significant catalytic activity. © 2012 Elsevier B.V.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
