TY - JOUR
T1 - Electrochemical performance of porous Ni3Al electrodes for hydrogen evolution reaction
AU - Dong, Hongxing
AU - Lei, Ting
AU - He, Yuehui
AU - Xu, Nanping
AU - Huang, Baiyun
AU - Liu, C. T.
PY - 2011/9
Y1 - 2011/9
N2 - Porous Ni3Al intermetallic material with a mean pore diameter of around 1 μm was prepared by step sintering Ni and Al powder pressed compacts in vacuum furnace at 900 °C. The electrocatalytic activity of the as-fabricated porous Ni3Al material as an electrode for hydrogen evolution reaction (HER) in alkaline solutions was investigated by cyclic voltammetry (CV), linear sweep voltammetry (LSV) and electrochemical impedance spectroscopy (EIS) techniques. It is found that the onset potential of porous Ni3Al for HER shifted in the positive direction favoring hydrogen generation with lower overpotential, compared with foam Ni and dense Ni electrodes. Effects of electrolyte concentration and temperature on HER as well as the electrochemical stability in alkaline solution were investigated and the electrochemical activation energy was determined for the porous Ni 3Al. The increased activity for HER was attributed to the high porosity, an increased electrochemical surface area and the nanostructure of porous Ni3Al electrode. The corrosion tests showed that the corrosion resistance of porous Ni3Al electrode changed during the immersion process due to the formation of passive film layers. © 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
AB - Porous Ni3Al intermetallic material with a mean pore diameter of around 1 μm was prepared by step sintering Ni and Al powder pressed compacts in vacuum furnace at 900 °C. The electrocatalytic activity of the as-fabricated porous Ni3Al material as an electrode for hydrogen evolution reaction (HER) in alkaline solutions was investigated by cyclic voltammetry (CV), linear sweep voltammetry (LSV) and electrochemical impedance spectroscopy (EIS) techniques. It is found that the onset potential of porous Ni3Al for HER shifted in the positive direction favoring hydrogen generation with lower overpotential, compared with foam Ni and dense Ni electrodes. Effects of electrolyte concentration and temperature on HER as well as the electrochemical stability in alkaline solution were investigated and the electrochemical activation energy was determined for the porous Ni 3Al. The increased activity for HER was attributed to the high porosity, an increased electrochemical surface area and the nanostructure of porous Ni3Al electrode. The corrosion tests showed that the corrosion resistance of porous Ni3Al electrode changed during the immersion process due to the formation of passive film layers. © 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
KW - Electrocatalytic activity
KW - Electrolysis
KW - Hydrogen evolution reaction
KW - Porous Ni3Al intermetallics
KW - Reactive synthesis
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U2 - 10.1016/j.ijhydene.2011.06.115
DO - 10.1016/j.ijhydene.2011.06.115
M3 - RGC 21 - Publication in refereed journal
SN - 0360-3199
VL - 36
SP - 12112
EP - 12120
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 19
ER -
