Ternary Ni60Fe30M10 (M = Cr, Mn, Cu) sintered alloys have been characterized by means of microstruc- tural and electrochemical techniques in view of their possible applications as electrocatalytic materials for hydrogen evolution reaction (HER). Well-mixed powders of nickel, iron and copper, manganese, or chromium were pressed together under high pressure at room temperature and then sintered in vac- uum at high temperature. The surface morphology of the alloys was examined by scanning electron microscopy (SEM) coupled with energy dispersive X-ray spectroscopy (EDXS). The electrochemical effi- ciency of the electrodes has been studied on the basis of electrochemical data obtained from steady- state polarization and electrochemical impedance spectroscopy (EIS) techniques in 1 M NaOH solution at 298 K. The results were compared with those obtained on binary Ni60Fe40 sintered alloy. The overall experimental data indicate that alloying Ni–Fe with Cr, Mn and Cu leads to an increase of electrocat- alytic activity in hydrogen evolution with respect to the Ni60Fe40 electrode. High catalytic efficiencies were achieved on Ni60Fe30Mn10 and Ni60Fe30Cr10 electrodes, the latter being the best electrocatalyst for the HER.

Electrocatalytic activity of Ni–Fe–M (M = Cr, Mn, Cu) sintered electrodes for hydrogen evolution reaction in alkaline solution / Rosalbino, Francesco; Scavino, Giorgio; ACTIS GRANDE, Marco. - In: JOURNAL OF ELECTROANALYTICAL CHEMISTRY. - ISSN 1572-6657. - ELETTRONICO. - 694:(2013), pp. 114-121. [10.1016/j.jelechem.2013.01.039]

Electrocatalytic activity of Ni–Fe–M (M = Cr, Mn, Cu) sintered electrodes for hydrogen evolution reaction in alkaline solution

ROSALBINO, Francesco;SCAVINO, Giorgio;ACTIS GRANDE, MARCO
2013

Abstract

Ternary Ni60Fe30M10 (M = Cr, Mn, Cu) sintered alloys have been characterized by means of microstruc- tural and electrochemical techniques in view of their possible applications as electrocatalytic materials for hydrogen evolution reaction (HER). Well-mixed powders of nickel, iron and copper, manganese, or chromium were pressed together under high pressure at room temperature and then sintered in vac- uum at high temperature. The surface morphology of the alloys was examined by scanning electron microscopy (SEM) coupled with energy dispersive X-ray spectroscopy (EDXS). The electrochemical effi- ciency of the electrodes has been studied on the basis of electrochemical data obtained from steady- state polarization and electrochemical impedance spectroscopy (EIS) techniques in 1 M NaOH solution at 298 K. The results were compared with those obtained on binary Ni60Fe40 sintered alloy. The overall experimental data indicate that alloying Ni–Fe with Cr, Mn and Cu leads to an increase of electrocat- alytic activity in hydrogen evolution with respect to the Ni60Fe40 electrode. High catalytic efficiencies were achieved on Ni60Fe30Mn10 and Ni60Fe30Cr10 electrodes, the latter being the best electrocatalyst for the HER.
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2507796
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo