The nucleation of Ni on carbon microelectrodes and its electrocatalytic activity in hydrogen evolution

被引：27

作者：

Petrovic, Z.

Metikos-Hukovic, M.

Grubac, Z.

Omanovic, S.

机构：

[1] Univ Zagreb, Fac Chem Engn & Technol, Dept Electrochem, Zagreb 10000, Croatia

[2] Univ Split, Fac Chem Technol, Dept Gen & Inorgan Chem, Split 21000, Croatia

[3] McGill Univ, Dept Chem Engn, Montreal, PQ H3A 2B2, Canada

来源：

THIN SOLID FILMS | 2006年 / 513卷 / 1-2期

关键词：

carbon; nickel; nucleation; hydrogen;

D O I：

10.1016/j.tsf.2006.01.026

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The paper discusses results on the nucleation (electrocrystallization) of nickel oil an assembly of carbon microelectrodes and its electrocatalytic activity in the hydrogen evolution reaction. It has been shown that within an appropriate potential range the nickel electrocrystallization follows a three-dimensional progressive nucleation and diffusion controlled stable cluster growth. Analysis of the experimental current transients has been carried out using a modified form of the Scharifker and Mostany equation that considers only the relevant part of the current density response. A set of kinetic and then nodynamic parameters has been determined: the nucleation rate. the number of atoms in the critical nucleus. the diffusion coefficient, and the Gibbs energy of nuclei formation. Ac and de measurements oil hydrogen evolution in an alkaline solution have demonstrated an increased electrocatalytic activity of the nanostructured Ni layer on carbon microelectrodes in the hydrogen evolution reaction in comparison to a bulk nickel electrode. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：193 / 200

页数：8

共 48 条

[1] Extracting nucleation rates from current-time transients: comments on the criticisms of Fletcher on three papers published in this issue [J].