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Methodology for Investigating Electrochemical Gas Evolution Reactions: Floating Electrode as a Means for Effective Gas Bubble Removal

[Image: see text] The future significance of energy conversion has stimulated intense investigation of various electrocatalytic materials. Hence electrocatalysts have become the subject of electrochemical characterization on a daily basis. In certain cases of interest, when measuring electrochemical...

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Autores principales: Jovanovič, Primož, Stojanovski, Kevin, Bele, Marjan, Dražić, Goran, Koderman Podboršek, Gorazd, Suhadolnik, Luka, Gaberšček, Miran, Hodnik, Nejc
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2019
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6748558/
https://www.ncbi.nlm.nih.gov/pubmed/31379155
http://dx.doi.org/10.1021/acs.analchem.9b01317
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author Jovanovič, Primož
Stojanovski, Kevin
Bele, Marjan
Dražić, Goran
Koderman Podboršek, Gorazd
Suhadolnik, Luka
Gaberšček, Miran
Hodnik, Nejc
author_facet Jovanovič, Primož
Stojanovski, Kevin
Bele, Marjan
Dražić, Goran
Koderman Podboršek, Gorazd
Suhadolnik, Luka
Gaberšček, Miran
Hodnik, Nejc
author_sort Jovanovič, Primož
collection PubMed
description [Image: see text] The future significance of energy conversion has stimulated intense investigation of various electrocatalytic materials. Hence electrocatalysts have become the subject of electrochemical characterization on a daily basis. In certain cases of interest, when measuring electrochemical reactions beyond the onset potentials, however, appropriateness of existing electroanalytical methods may be questioned and alternative approaches need to be developed. The present study highlights some shortcomings in the electrochemical investigation of gas evolving reactions. The oxygen evolution reaction (OER) is selected as a case example with a specific focus on the electrochemical stability of a nanoparticulate iridium catalyst. When conventional electrochemical methods, such as thin film rotating disc electrodes are employed to study the materials’ stability, the intrinsic degradation is masked by oxygen bubbles, which are inherently being formed during the reaction, especially when high current densities are used. In this Letter, we present a solution to this issue, the so-called floating electrode arrangement. Its elegant usage enables fast and reliable electrochemical characterization of oxygen evolution electrocatalysts.
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spelling pubmed-67485582019-09-18 Methodology for Investigating Electrochemical Gas Evolution Reactions: Floating Electrode as a Means for Effective Gas Bubble Removal Jovanovič, Primož Stojanovski, Kevin Bele, Marjan Dražić, Goran Koderman Podboršek, Gorazd Suhadolnik, Luka Gaberšček, Miran Hodnik, Nejc Anal Chem [Image: see text] The future significance of energy conversion has stimulated intense investigation of various electrocatalytic materials. Hence electrocatalysts have become the subject of electrochemical characterization on a daily basis. In certain cases of interest, when measuring electrochemical reactions beyond the onset potentials, however, appropriateness of existing electroanalytical methods may be questioned and alternative approaches need to be developed. The present study highlights some shortcomings in the electrochemical investigation of gas evolving reactions. The oxygen evolution reaction (OER) is selected as a case example with a specific focus on the electrochemical stability of a nanoparticulate iridium catalyst. When conventional electrochemical methods, such as thin film rotating disc electrodes are employed to study the materials’ stability, the intrinsic degradation is masked by oxygen bubbles, which are inherently being formed during the reaction, especially when high current densities are used. In this Letter, we present a solution to this issue, the so-called floating electrode arrangement. Its elegant usage enables fast and reliable electrochemical characterization of oxygen evolution electrocatalysts. American Chemical Society 2019-08-05 2019-08-20 /pmc/articles/PMC6748558/ /pubmed/31379155 http://dx.doi.org/10.1021/acs.analchem.9b01317 Text en Copyright © 2019 American Chemical Society This is an open access article published under a Creative Commons Attribution (CC-BY) License (http://pubs.acs.org/page/policy/authorchoice_ccby_termsofuse.html) , which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited.
spellingShingle Jovanovič, Primož
Stojanovski, Kevin
Bele, Marjan
Dražić, Goran
Koderman Podboršek, Gorazd
Suhadolnik, Luka
Gaberšček, Miran
Hodnik, Nejc
Methodology for Investigating Electrochemical Gas Evolution Reactions: Floating Electrode as a Means for Effective Gas Bubble Removal
title Methodology for Investigating Electrochemical Gas Evolution Reactions: Floating Electrode as a Means for Effective Gas Bubble Removal
title_full Methodology for Investigating Electrochemical Gas Evolution Reactions: Floating Electrode as a Means for Effective Gas Bubble Removal
title_fullStr Methodology for Investigating Electrochemical Gas Evolution Reactions: Floating Electrode as a Means for Effective Gas Bubble Removal
title_full_unstemmed Methodology for Investigating Electrochemical Gas Evolution Reactions: Floating Electrode as a Means for Effective Gas Bubble Removal
title_short Methodology for Investigating Electrochemical Gas Evolution Reactions: Floating Electrode as a Means for Effective Gas Bubble Removal
title_sort methodology for investigating electrochemical gas evolution reactions: floating electrode as a means for effective gas bubble removal
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6748558/
https://www.ncbi.nlm.nih.gov/pubmed/31379155
http://dx.doi.org/10.1021/acs.analchem.9b01317
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