English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  A comparative study on gold and platinum dissolution in acidic and alkaline media

Cherevko, S., Žeradjanin, A. R., Keeley, G. P., & Mayrhofer, K. J. J. (2014). A comparative study on gold and platinum dissolution in acidic and alkaline media. Journal of the Electrochemical Society, 161(12), H822-H830. doi:10.1149/2.0881412jes.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0024-C6E4-E Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0027-D279-3
Genre: Journal Article

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Cherevko, Serhiy1, Author              
Žeradjanin, Aleksandar R.1, Author              
Keeley, Gareth P.1, Author              
Mayrhofer, Karl J. J.1, Author              
Affiliations:
1Electrocatalysis, Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863354              

Content

show
hide
Free keywords: Alkaline electrolytes; Comparative studies; Dissolution profiles; Electrochemical dissolution; Oxidation/reduction; Oxygen evolution reaction; Platinum dissolution; Transient dissolution
 Abstract: Electrochemical dissolution of gold and platinum in 0.1 M HClO4, 0.1 M H2SO4, and 0.05 M NaOH is investigated. The qualitative picture of both metals' dissolution is pH-independent. Oxidation/reduction of the metal's surface leads to the transient dissolution peaks which we label A(1) and C-1 on the dissolution profiles. Commencement of the oxygen evolution reaction (OER) results in the additional dissolution peak A(2). Quantitatively, there are important differences. The amount of gold transiently dissolved in alkaline medium is more than an order of magnitude higher in comparison to that in acidic medium. Oppositely, steady-state gold dissolution in base in the potential region of OER is hindered. The transient dissolution of platinum is by a factor of two higher in base. It is suggested that variation of the pH does not change the mechanism of the OER on platinum. Consequently, the dissolution rate of platinum is equal in acidic and alkaline electrolytes. As an explanation of the observed difference in gold dissolution, a difference in the thickness of compact oxide formed in acid and base is suggested. Growth of a thicker compact oxide in the alkaline medium explains the increased transient and the decreased steady-state dissolution of gold. (C) The Author(s) 2014. Published by ECS. This is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial No Derivatives 4.0 License (CC BY-NC-ND, http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial reuse, distribution, and reproduction in any medium, provided the original work is not changed in any way and is properly cited. For permission for commercial reuse, please email: oa@electrochem.org. All rights reserved.

Details

show
hide
Language(s): eng - English
 Dates: 2014
 Publication Status: Published in print
 Pages: 9
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: ISI: 000343800400100
DOI: 10.1149/2.0881412jes
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Journal of the Electrochemical Society
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: New York, NY, USA : Electrochemical Society
Pages: - Volume / Issue: 161 (12) Sequence Number: - Start / End Page: H822 - H830 Identifier: ISSN: 0013-4651
CoNE: /journals/resource/991042748197686