Correlation of microstructure and catalytic activity of crystalline Ni-Co-Y alloy electrode for the hydrogen evolution reaction in alkaline solution
- 1. Politecnico di Torino, Dipartimento di Scienza dei Materiali e Ingegneria Chimica (DICHI), Corso Duca degli Abruzzi 24, I-10129 Torino (Italy)
- 2. Universita degli Studi di Genova, Dipartimento di Chimica e Chimica Industriale (DCCI), INSTM, UdR Genova, Via Dodecaneso 31, I-16146 Genova (Italy)
Description
The electrocatalytic activity of crystalline Ni65Co29Y6 alloy with respect to the hydrogen evolution reaction (HER) was studied in relation to its microstructure examined by optical microscopy, scanning electron microscopy coupled with electron probe microanalysis, and XRD measurements. Kinetic parameters of the HER were evaluated on the basis of electrochemical impedance spectroscopy and steady-state polarization techniques in 1 M NaOH solution at room temperature. The results were compared with those obtained on polycrystalline Ni metal. The enhanced electrocatalytic activity observed for the HER on the investigated alloy was ascribed to a pronounced synergetic effect between the alloy constituents, i.e. Ni63Co37 and (Ni,Co)17Y2 intermetallic compounds
Additional details
Identifiers
- DOI
- 10.1016/j.jallcom.2006.03.090;
- PII
- S0925-8388(06)00389-6;
Publishing Information
- Journal Title
- Journal of Alloys and Compounds
- Journal Volume
- 429
- Journal Issue
- 1-2
- Journal Page Range
- p. 270-275
- ISSN
- 0925-8388
- CODEN
- JALCEU
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 39013233
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- CASTING; COBALT ALLOYS; ELECTROCHEMISTRY; ELECTRODES; ELECTRON MICROPROBE ANALYSIS; HYDROGEN; IMPEDANCE; INTERMETALLIC COMPOUNDS; MICROSTRUCTURE; NICKEL ALLOYS; OPTICAL MICROSCOPY; POLARIZATION; POLYCRYSTALS; SCANNING ELECTRON MICROSCOPY; STEADY-STATE CONDITIONS; TEMPERATURE RANGE 0273-0400 K; X-RAY DIFFRACTION; YTTRIUM ALLOYS
- Descriptors DEC
- ALLOYS; CHEMICAL ANALYSIS; CHEMISTRY; COHERENT SCATTERING; CRYSTALS; DIFFRACTION; ELECTRON MICROSCOPY; ELEMENTS; FABRICATION; MICROANALYSIS; MICROSCOPY; NONDESTRUCTIVE ANALYSIS; NONMETALS; SCATTERING; TEMPERATURE RANGE; TRANSITION ELEMENT ALLOYS
Optional Information
- Copyright
- Copyright (c) 2006 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.