Paper Title:
Comparative Potentiodynamic Study of Nickel and Hydrogen Underpotential Deposition at Polycrystalline Platinum Electrode in Weak Acid and Neutral Solutions
  Abstract

Underpotential deposition of nickel and hydrogen on polycrystalline platinum in weak acid and neutral solutions (3.5 ≤ pH ≤ 7.0), with and without Ni2+-ions, has been examined using cyclic voltammetric technique in the range of temperature from 274 to 313 K. The nickel and hydrogen ad-atom surface coverages were calculated from the voltammetric adsorption and desorption charges. The Temkin isotherm was fitted for both underpotential depositions, and thermodynamic adsorption parameters were calculated for both atoms. The value of the bonding energy between hydrogen and surface in the presence of underpotentially deposited nickel was calculated and found to amount to 287 kJ mol-1, which is 40 kJ mol-1 stronger bond than the same of pure platinum. The presence of nickel on the surface facilitates interfacial transfer of hydrogen into the metal bulk and consequent hydride formation significant in design of hydrogen based fuel cells.

  Info
Periodical
Edited by
Dragan P. Uskokovic, Slobodan K. Milonjic, Djan I. Rakovic
Pages
241-246
DOI
10.4028/www.scientific.net/MSF.494.241
Citation
M.D. Obradović, B.N. Grgur, L.M. Vračar, "Comparative Potentiodynamic Study of Nickel and Hydrogen Underpotential Deposition at Polycrystalline Platinum Electrode in Weak Acid and Neutral Solutions ", Materials Science Forum, Vol. 494, pp. 241-246, 2005
Online since
September 2005
Export
Price
$35.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Hai Lan Huang, Guo Ming Wang, Rong Jun Qu, Xu Bo
Abstract:A novel chelating resin, crosslinking polystyrene-supported glucosamine (PS-GA), was prepared and its static adsorption properties for Ag(Ⅰ)...
478
Authors: Xiao Li Xiong, Chen Bin Shao
Abstract:The potential to remove xylenol orange (XO) from aqueous solutions through adsorption on γ-cyclodextrin-grafted carboxymethyl cellulose...
1180
Authors: Shu He Tang, Jing Ping Wang, Yu Feng Sun, Nan Nan Dai
Chapter 1: Environmental Chemistry and Biology
Abstract:Two kinds of hypercrosslinked resin ZH-01 and ZH-03 were prepared in this study. Experimental investigations were conducted to study the...
298
Authors: Juan Liu, Jin Chang Liu, Xin Yao, Qiang Xie
Abstract:The adsorption isotherms and kinetics of nickel ion onto commercial activated carbons were determined and investigated under different...
551
Authors: Masaru Shimomura, Keisuke Ota
Chapter 1: Solid-State Physics and Related Technologies
Abstract:Adsorption of pyrrole on the Si(111)-7×7 surface was investigated using scanning tunneling microscopy (STM). Template-induced molecular...
35