Electrochemical performance of porous Ni3Al electrodes for hydrogen evolution reaction

被引：122

作者：

Dong, Hongxing ^{[1
,2
]}

Lei, Ting ^{[1
]}

He, Yuehui ^{[1
]}

Xu, Nanping ^{[3
]}

Huang, Baiyun ^{[1
]}

Liu, C. T. ^{[4
]}

机构：

[1] Cent S Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China

[2] Hangzhou Polytech, Inst Electromech, Hangzhou 311402, Zhejiang, Peoples R China

[3] Nanjing Univ Technol, Membrane Sci & Technol Res Ctr, Nanjing 210009, Peoples R China

[4] Hong Kong Polytech Univ, Dept Mech Engn, Hong Kong, Hong Kong, Peoples R China

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2011年 / 36卷 / 19期

基金：

中国国家自然科学基金; 国家杰出青年科学基金;

关键词：

Porous Ni3Al intermetallics; Reactive synthesis; Hydrogen evolution reaction; Electrocatalytic activity; Electrolysis; NICKEL; KINETICS; ALLOY; MORPHOLOGY; IMPEDANCE; BEHAVIOR; POWDER;

D O I：

10.1016/j.ijhydene.2011.06.115

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：

Porous Ni3Al intermetallic material with a mean pore diameter of around 1 pm was prepared by step sintering Ni and Al powder pressed compacts in vacuum furnace at 900 degrees 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 Ni3Al. 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. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：12112 / 12120

页数：9

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