Investigation of the electrocatalytic behaviour of Fe-MM (MM = Mischmetal) crystalline alloys for hydrogen evolution reaction in alkaline medium

被引：10

作者：

Rosalbino, F.

Maccio, D.

Saccone, A.

Angelini, E.

Delfino, S.

机构：

[1] Politecn Torino, Dipartimento Sci Mat & Ingn Chim, DICHI, I-10129 Turin, Italy

[2] Univ Genoa, Dipartimento Chim & Chim Ind, I-16146 Genoa, Italy

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2007年 / 431卷 / 1-2期

关键词：

iron-rare earth systems; intermetallic phases; hydrogen evolution reaction (HER); electrocatalytic behaviour; functional materials;

D O I：

10.1016/j.jallcom.2006.05.055

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Fe-MM (MM=mischmetal) crystalline alloys have been characterized by means of microstructural and electrochemical techniques in view of their possible application as electrocatalytic materials for the hydrogen evolution reaction (HER). The microstructure of the alloys investigated (Fe(95)MM(5), Fe(85)MM(15), Fe(80)MM(20), Fe(70)MM(30)) has been characterized by phase analysis techniques (SEM-EPMA, XRD). The electrocatalytic efficiency has been evaluated on the basis of electrochemical data obtained from cathodic polarization curves and ac impedance measurements carried out in 1 M NaOH solution at 298 K. The microstructural features play a fundamental role in determining the electrocatalytic activity of the investigated alloys. The overall experimental data indicate that interesting electrocatalytic performances are obtained with the Fe(80)MM(20) electrode, which exhibits the highest activity towards the HER. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：256 / 261

页数：6

共 42 条

[1] CHARACTERIZATION OF THE ELECTROCATALYTIC PROPERTIES OF AMORPHOUS METALS FOR OXYGEN AND HYDROGEN EVOLUTION BY IMPEDANCE MEASUREMENTS [J].