Evaluation of Raney nickel electrodes prepared by atmospheric plasma spraying for alkaline water electrolysers

Daniel Chade, Leonard Berlouis, David Infield, Andrew Cruden, Peter Nielsen, Troels Mathiesen

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

The work describes the evaluation of Raney nickel electrodes prepared by the technique of atmospheric plasma spraying (APS). The APS Raney nickel layers of 30 mm, 100 mm and 300 mm thicknesses were characterised prior to and post-chemical activation by SEM. Following further electrochemical activation, the performance of these layers towards hydrogen evolution reaction (HER) were evaluated using potentiodynamic Tafel analysis and electrochemical impedance spectroscopy (EIS) in 30% KOH solutions over the temperature range 30 Ce80 C. Large surface area increases, in relation to smooth nickel, were obtained for these layers following activation and these were also confirmed from cyclic voltammetry measurements. The analysis of the data indicated that of the 3 thicknesses examined, the best electrocatalytic activity towards HER was obtained for 100 mm sample, with an efficiency (based on the Higher Heating Value for H2) equal to 96% at a current density of 300 mA cm2 and temperature of 70 C.
Original languageEnglish
Pages (from-to)14380-14390
Number of pages11
JournalInternational Journal of Hydrogen Energy
Volume38
Issue number34
Early online date2 Oct 2013
DOIs
Publication statusPublished - 2013

Fingerprint

plasma spraying
Plasma spraying
Nickel
Chemical activation
nickel
activation
Electrodes
electrodes
Water
evaluation
Hydrogen
water
hydrogen
Electrochemical impedance spectroscopy
Cyclic voltammetry
Current density
impedance
current density
Heating
Temperature

Keywords

  • Alkaline electrolyser
  • hydrogen
  • Raney nickel
  • renewable energy
  • electrocatalyst

Cite this

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title = "Evaluation of Raney nickel electrodes prepared by atmospheric plasma spraying for alkaline water electrolysers",
abstract = "The work describes the evaluation of Raney nickel electrodes prepared by the technique of atmospheric plasma spraying (APS). The APS Raney nickel layers of 30 mm, 100 mm and 300 mm thicknesses were characterised prior to and post-chemical activation by SEM. Following further electrochemical activation, the performance of these layers towards hydrogen evolution reaction (HER) were evaluated using potentiodynamic Tafel analysis and electrochemical impedance spectroscopy (EIS) in 30{\%} KOH solutions over the temperature range 30 Ce80 C. Large surface area increases, in relation to smooth nickel, were obtained for these layers following activation and these were also confirmed from cyclic voltammetry measurements. The analysis of the data indicated that of the 3 thicknesses examined, the best electrocatalytic activity towards HER was obtained for 100 mm sample, with an efficiency (based on the Higher Heating Value for H2) equal to 96{\%} at a current density of 300 mA cm2 and temperature of 70 C.",
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Evaluation of Raney nickel electrodes prepared by atmospheric plasma spraying for alkaline water electrolysers. / Chade, Daniel; Berlouis, Leonard; Infield, David; Cruden, Andrew; Nielsen, Peter; Mathiesen, Troels.

In: International Journal of Hydrogen Energy, Vol. 38, No. 34, 2013, p. 14380-14390.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Evaluation of Raney nickel electrodes prepared by atmospheric plasma spraying for alkaline water electrolysers

AU - Chade, Daniel

AU - Berlouis, Leonard

AU - Infield, David

AU - Cruden, Andrew

AU - Nielsen, Peter

AU - Mathiesen, Troels

PY - 2013

Y1 - 2013

N2 - The work describes the evaluation of Raney nickel electrodes prepared by the technique of atmospheric plasma spraying (APS). The APS Raney nickel layers of 30 mm, 100 mm and 300 mm thicknesses were characterised prior to and post-chemical activation by SEM. Following further electrochemical activation, the performance of these layers towards hydrogen evolution reaction (HER) were evaluated using potentiodynamic Tafel analysis and electrochemical impedance spectroscopy (EIS) in 30% KOH solutions over the temperature range 30 Ce80 C. Large surface area increases, in relation to smooth nickel, were obtained for these layers following activation and these were also confirmed from cyclic voltammetry measurements. The analysis of the data indicated that of the 3 thicknesses examined, the best electrocatalytic activity towards HER was obtained for 100 mm sample, with an efficiency (based on the Higher Heating Value for H2) equal to 96% at a current density of 300 mA cm2 and temperature of 70 C.

AB - The work describes the evaluation of Raney nickel electrodes prepared by the technique of atmospheric plasma spraying (APS). The APS Raney nickel layers of 30 mm, 100 mm and 300 mm thicknesses were characterised prior to and post-chemical activation by SEM. Following further electrochemical activation, the performance of these layers towards hydrogen evolution reaction (HER) were evaluated using potentiodynamic Tafel analysis and electrochemical impedance spectroscopy (EIS) in 30% KOH solutions over the temperature range 30 Ce80 C. Large surface area increases, in relation to smooth nickel, were obtained for these layers following activation and these were also confirmed from cyclic voltammetry measurements. The analysis of the data indicated that of the 3 thicknesses examined, the best electrocatalytic activity towards HER was obtained for 100 mm sample, with an efficiency (based on the Higher Heating Value for H2) equal to 96% at a current density of 300 mA cm2 and temperature of 70 C.

KW - Alkaline electrolyser

KW - hydrogen

KW - Raney nickel

KW - renewable energy

KW - electrocatalyst

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JO - International Journal of Hydrogen Energy

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