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The Source of Anodic Hydrogen Evolution on Ultra High Purity Magnesium

S. Fajardo, Carol Glover, Geraint Williams Orcid Logo, G.S. Frankel

Electrochimica Acta, Volume: 212, Pages: 510 - 521

Swansea University Authors: Carol Glover, Geraint Williams Orcid Logo

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DOI (Published version): 10.1016/j.electacta.2016.07.018

Abstract

The enhanced catalytic activity of hydrogen evolution reaction on anodically polarized Mg surfaces, commonly referred to as the Negative Difference Effect, has been the topic of intense investigation in recent years. However, the cause of anodic H2 remains unclear. To determine the primary source of...

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Published in: Electrochimica Acta
ISSN: 0013-4686
Published: 2016
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URI: https://cronfa.swan.ac.uk/Record/cronfa29266
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first_indexed 2016-08-05T13:00:11Z
last_indexed 2021-01-15T03:47:03Z
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spelling 2021-01-14T13:28:23.9240450 v2 29266 2016-07-22 The Source of Anodic Hydrogen Evolution on Ultra High Purity Magnesium f1c17580848e7967d7c2111d4cb3516c Carol Glover Carol Glover true false 0d8fc8d44e2a3c88ce61832f66f20d82 0000-0002-3399-5142 Geraint Williams Geraint Williams true false 2016-07-22 EEN The enhanced catalytic activity of hydrogen evolution reaction on anodically polarized Mg surfaces, commonly referred to as the Negative Difference Effect, has been the topic of intense investigation in recent years. However, the cause of anodic H2 remains unclear. To determine the primary source of H2 evolution on dissolving Mg polarized at anodic potentials, an in-situ scanning vibrating electrode technique (SVET) analysis during galvanostatic polarization, coupled with gravimetric H2 volume collection and potentiodynamic polarization experiments, were carried out on ultra-high purity Mg (99.9999% Mg). The combination of these methods provided solid evidence that the evolution of hydrogen on dissolving ultra-pure Mg is primarily associated with the regions dominated by the anodic reaction. Although local cathodes corresponding with the dark corrosion film formed during anodic dissolution were revealed by in-situ SVET, they appeared to play a minor role in the process. Journal Article Electrochimica Acta 212 510 521 0013-4686 hydrogen evolution, magnesium, scanning vibrating electrode technique, anodic dissolution, NDE 10 9 2016 2016-09-10 10.1016/j.electacta.2016.07.018 COLLEGE NANME Engineering COLLEGE CODE EEN Swansea University 2021-01-14T13:28:23.9240450 2016-07-22T11:46:55.1354118 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering S. Fajardo 1 Carol Glover 2 Geraint Williams 0000-0002-3399-5142 3 G.S. Frankel 4 0029266-22072016114812.pdf Fajardo2016.pdf 2016-07-22T11:48:12.6870000 Output 1123377 application/pdf Accepted Manuscript true 2017-07-05T00:00:00.0000000 Released under the terms of a Creative Commons Attribution License (CC-BY). true eng
title The Source of Anodic Hydrogen Evolution on Ultra High Purity Magnesium
spellingShingle The Source of Anodic Hydrogen Evolution on Ultra High Purity Magnesium
Carol Glover
Geraint Williams
title_short The Source of Anodic Hydrogen Evolution on Ultra High Purity Magnesium
title_full The Source of Anodic Hydrogen Evolution on Ultra High Purity Magnesium
title_fullStr The Source of Anodic Hydrogen Evolution on Ultra High Purity Magnesium
title_full_unstemmed The Source of Anodic Hydrogen Evolution on Ultra High Purity Magnesium
title_sort The Source of Anodic Hydrogen Evolution on Ultra High Purity Magnesium
author_id_str_mv f1c17580848e7967d7c2111d4cb3516c
0d8fc8d44e2a3c88ce61832f66f20d82
author_id_fullname_str_mv f1c17580848e7967d7c2111d4cb3516c_***_Carol Glover
0d8fc8d44e2a3c88ce61832f66f20d82_***_Geraint Williams
author Carol Glover
Geraint Williams
author2 S. Fajardo
Carol Glover
Geraint Williams
G.S. Frankel
format Journal article
container_title Electrochimica Acta
container_volume 212
container_start_page 510
publishDate 2016
institution Swansea University
issn 0013-4686
doi_str_mv 10.1016/j.electacta.2016.07.018
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Materials Science and Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Materials Science and Engineering
document_store_str 1
active_str 0
description The enhanced catalytic activity of hydrogen evolution reaction on anodically polarized Mg surfaces, commonly referred to as the Negative Difference Effect, has been the topic of intense investigation in recent years. However, the cause of anodic H2 remains unclear. To determine the primary source of H2 evolution on dissolving Mg polarized at anodic potentials, an in-situ scanning vibrating electrode technique (SVET) analysis during galvanostatic polarization, coupled with gravimetric H2 volume collection and potentiodynamic polarization experiments, were carried out on ultra-high purity Mg (99.9999% Mg). The combination of these methods provided solid evidence that the evolution of hydrogen on dissolving ultra-pure Mg is primarily associated with the regions dominated by the anodic reaction. Although local cathodes corresponding with the dark corrosion film formed during anodic dissolution were revealed by in-situ SVET, they appeared to play a minor role in the process.
published_date 2016-09-10T03:35:38Z
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score 11.036706

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