Nickel particles with increased catalytic activity towards hydrogen evolution reaction

被引：23

作者：

Baranova, Elena A. ^{[1
]}

Cally, Audrey ^{[1
]}

Allagui, Anis ^{[1
]}

Ntais, Spyridon ^{[2
]}

Wuethrich, Rolf ^{[3
]}

机构：

[1] Univ Ottawa, Dept Chem & Biol Engn, Ottawa, ON K1N 6N5, Canada

[2] Inst Chem Engn & High Temp Chem Proc FORTH ICE HT, GR-26504 Platani, Greece

[3] Concordia Univ, Dept Mech & Ind Engn, Montreal, PQ H3G 1M8, Canada

来源：

COMPTES RENDUS CHIMIE | 2013年 / 16卷 / 01期

关键词：

Nickel; Electrochemistry; Cyclic voltammetry; Hydrogen evolution reaction; Electrochemical treatment; Photoelectron spectroscopy; ELECTROLYTIC HYDROGEN; SURFACE; OXYGEN; XPS; NI; ELECTROOXIDATION; NANOPARTICLES; ADSORPTION; OXIDATION; KINETICS;

D O I：

10.1016/j.crci.2012.02.003

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Nickel particles are synthesized by a modified polyol method using 1 at. % of Pd as nucleation agent (Ni99Pd1) followed by an electrochemical sinusoidal wave treatment in 0.1 M Na2SO4 + 30 mM ascorbic acid. This treatment proved to significantly enhance the catalytic activity of Ni towards the hydrogen evolution reaction (her). After treatment, the current density of her increases almost four times and is accompanied by the onset potential shift to more positive values. From SEM, no visible changes in Ni particle size and shape were observed after treatment. XPS analysis of the surface of as-prepared Ni particles reveals that it contains Ni-0, NiO, NiOOH and Ni(OH)(2), whereas after treatment Ni atoms exist mainly in the metallic form and as NiOOH. The increase in the activity of Ni particles after the treatment might be due to the higher amount of Ni-0 at the surface. (C) 2012 Academie des sciences. Published by Elsevier Masson SAS. All rights reserved.

引用

页码：28 / 33

页数：6

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