A novel scanning electrochemical microscopy strategy for the investigation of anomalous hydrogen evolution from AZ63 magnesium alloy

D. Filotás, B. M. Fernández-Pérez, L. Nagy, G. Nagy, R. M. Souto

Research output: Contribution to journalArticle

Abstract

The evolution of hydrogen gas from corroding magnesium arises not exclusively from the cathodic half-cell reaction due to the consumption of the electrons released by the dissolving metal, but anodized magnesium generates significant amounts of H2 gas as well. In addition, the increase of the anodic overpotential enhances the rate of hydrogen gas generation. Therefore, spatially-resolved detection of the actual sites for hydrogen evolution related to anodically-activated sites is attempted using scanning electrochemical microscopy (SECM). This work describes a new experimental procedure for SECM based on a three-step (off-on-off) anodization operation sequence that was designed to obtain new insights into the behavior of magnesium and magnesium alloys when they are subjected to anodic polarization. Results obtained with scanning electrochemical microscopy (SECM) and scanning vibrating electrode technique (SVET) experiments presented here demonstrate the catalytic properties of the magnesium-oxide film for the hydrogen-evolution reaction.

Original languageEnglish
Article number127691
JournalSensors and Actuators, B: Chemical
Volume308
DOIs
Publication statusPublished - Apr 1 2020

Fingerprint

magnesium alloys
Magnesium alloys
Hydrogen
Microscopic examination
Magnesium
microscopy
Scanning
magnesium
scanning
Gases
hydrogen
Magnesium Oxide
gases
Anodic polarization
magnesium oxides
Magnesia
Oxide films
oxide films
dissolving
Metals

Keywords

  • Corrosion
  • Hydrogen evolution
  • Magnesium alloys
  • Scanning electrochemical microscopy
  • Scanning vibrating electrode technique

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

Cite this

A novel scanning electrochemical microscopy strategy for the investigation of anomalous hydrogen evolution from AZ63 magnesium alloy. / Filotás, D.; Fernández-Pérez, B. M.; Nagy, L.; Nagy, G.; Souto, R. M.

In: Sensors and Actuators, B: Chemical, Vol. 308, 127691, 01.04.2020.

Research output: Contribution to journalArticle

@article{e6fbca2cf1564b3fab632292a79f205a,
title = "A novel scanning electrochemical microscopy strategy for the investigation of anomalous hydrogen evolution from AZ63 magnesium alloy",
abstract = "The evolution of hydrogen gas from corroding magnesium arises not exclusively from the cathodic half-cell reaction due to the consumption of the electrons released by the dissolving metal, but anodized magnesium generates significant amounts of H2 gas as well. In addition, the increase of the anodic overpotential enhances the rate of hydrogen gas generation. Therefore, spatially-resolved detection of the actual sites for hydrogen evolution related to anodically-activated sites is attempted using scanning electrochemical microscopy (SECM). This work describes a new experimental procedure for SECM based on a three-step (off-on-off) anodization operation sequence that was designed to obtain new insights into the behavior of magnesium and magnesium alloys when they are subjected to anodic polarization. Results obtained with scanning electrochemical microscopy (SECM) and scanning vibrating electrode technique (SVET) experiments presented here demonstrate the catalytic properties of the magnesium-oxide film for the hydrogen-evolution reaction.",
keywords = "Corrosion, Hydrogen evolution, Magnesium alloys, Scanning electrochemical microscopy, Scanning vibrating electrode technique",
author = "D. Filot{\'a}s and Fern{\'a}ndez-P{\'e}rez, {B. M.} and L. Nagy and G. Nagy and Souto, {R. M.}",
year = "2020",
month = "4",
day = "1",
doi = "10.1016/j.snb.2020.127691",
language = "English",
volume = "308",
journal = "Sensors and Actuators, B: Chemical",
issn = "0925-4005",
publisher = "Elsevier",

}

TY - JOUR

T1 - A novel scanning electrochemical microscopy strategy for the investigation of anomalous hydrogen evolution from AZ63 magnesium alloy

AU - Filotás, D.

AU - Fernández-Pérez, B. M.

AU - Nagy, L.

AU - Nagy, G.

AU - Souto, R. M.

PY - 2020/4/1

Y1 - 2020/4/1

N2 - The evolution of hydrogen gas from corroding magnesium arises not exclusively from the cathodic half-cell reaction due to the consumption of the electrons released by the dissolving metal, but anodized magnesium generates significant amounts of H2 gas as well. In addition, the increase of the anodic overpotential enhances the rate of hydrogen gas generation. Therefore, spatially-resolved detection of the actual sites for hydrogen evolution related to anodically-activated sites is attempted using scanning electrochemical microscopy (SECM). This work describes a new experimental procedure for SECM based on a three-step (off-on-off) anodization operation sequence that was designed to obtain new insights into the behavior of magnesium and magnesium alloys when they are subjected to anodic polarization. Results obtained with scanning electrochemical microscopy (SECM) and scanning vibrating electrode technique (SVET) experiments presented here demonstrate the catalytic properties of the magnesium-oxide film for the hydrogen-evolution reaction.

AB - The evolution of hydrogen gas from corroding magnesium arises not exclusively from the cathodic half-cell reaction due to the consumption of the electrons released by the dissolving metal, but anodized magnesium generates significant amounts of H2 gas as well. In addition, the increase of the anodic overpotential enhances the rate of hydrogen gas generation. Therefore, spatially-resolved detection of the actual sites for hydrogen evolution related to anodically-activated sites is attempted using scanning electrochemical microscopy (SECM). This work describes a new experimental procedure for SECM based on a three-step (off-on-off) anodization operation sequence that was designed to obtain new insights into the behavior of magnesium and magnesium alloys when they are subjected to anodic polarization. Results obtained with scanning electrochemical microscopy (SECM) and scanning vibrating electrode technique (SVET) experiments presented here demonstrate the catalytic properties of the magnesium-oxide film for the hydrogen-evolution reaction.

KW - Corrosion

KW - Hydrogen evolution

KW - Magnesium alloys

KW - Scanning electrochemical microscopy

KW - Scanning vibrating electrode technique

UR - http://www.scopus.com/inward/record.url?scp=85077689468&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85077689468&partnerID=8YFLogxK

U2 - 10.1016/j.snb.2020.127691

DO - 10.1016/j.snb.2020.127691

M3 - Article

AN - SCOPUS:85077689468

VL - 308

JO - Sensors and Actuators, B: Chemical

JF - Sensors and Actuators, B: Chemical

SN - 0925-4005

M1 - 127691

ER -