Poisoning Effect of CO: How It Changes Hydrogen Electrode Reaction and How to Analyze It Using Differential Polarization Curve

The hydrogen electrode reaction (HER) on Pt electrode in a H2SO4 solution when CO gas was injected/stopped was studied using polarization resistance curve. In order to elucidate and confirm the CO poisoning effect, a few curve techniqu...

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Autores principales:	Osami Seri, Kazunao Furumata
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	hydrogen evolution reaction platinum electrode CO poisoning polarization resistance curve Tafel slope Chemical technology TP1-1185 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/a40d71a757eb427da88dfbf4fedd5a41
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spelling	oai:doaj.org-article:a40d71a757eb427da88dfbf4fedd5a412021-11-25T17:05:52ZPoisoning Effect of CO: How It Changes Hydrogen Electrode Reaction and How to Analyze It Using Differential Polarization Curve10.3390/catal111113222073-4344https://doaj.org/article/a40d71a757eb427da88dfbf4fedd5a412021-10-01T00:00:00Zhttps://www.mdpi.com/2073-4344/11/11/1322https://doaj.org/toc/2073-4344The hydrogen electrode reaction (<i>HER</i>) on Pt electrode in a H<sub>2</sub>SO<sub>4</sub> solution when CO gas was injected/stopped was studied using polarization resistance curve. In order to elucidate and confirm the CO poisoning effect, a few curve techniques were proposed. Applying them, the kinetic parameters such as the number of electrons transferred (<i>z</i>) and the cathodic transfer coefficient (<i>α</i><sub>c</sub>) were determined. The <i>HER</i> in a 0.5 mol dm<sup>−3</sup> H<sub>2</sub>SO<sub>4</sub> solution saturated with H<sub>2</sub> was confirmed as a reversible reaction having <i>z</i> = 2. When the above solution was injected with CO, the reversible <i>HER</i> changed to an irreversible reaction having <i>z</i> = 1 and <i>α</i><sub>c</sub> ≈ 0.6. Once we stopped the CO injection, alteration from the irreversible to quasireversible reaction was gradually made after several cyclic polarizations. The proposed curve techniques can provide a reliable way to determine the kinetic parameters changing among reversible, irreversible, and quasireversible reactions.Osami SeriKazunao FurumataMDPI AGarticlehydrogen evolution reactionplatinum electrodeCO poisoningpolarization resistance curveTafel slopeChemical technologyTP1-1185ChemistryQD1-999ENCatalysts, Vol 11, Iss 1322, p 1322 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	hydrogen evolution reaction platinum electrode CO poisoning polarization resistance curve Tafel slope Chemical technology TP1-1185 Chemistry QD1-999
spellingShingle	hydrogen evolution reaction platinum electrode CO poisoning polarization resistance curve Tafel slope Chemical technology TP1-1185 Chemistry QD1-999 Osami Seri Kazunao Furumata Poisoning Effect of CO: How It Changes Hydrogen Electrode Reaction and How to Analyze It Using Differential Polarization Curve
description	The hydrogen electrode reaction (<i>HER</i>) on Pt electrode in a H<sub>2</sub>SO<sub>4</sub> solution when CO gas was injected/stopped was studied using polarization resistance curve. In order to elucidate and confirm the CO poisoning effect, a few curve techniques were proposed. Applying them, the kinetic parameters such as the number of electrons transferred (<i>z</i>) and the cathodic transfer coefficient (<i>α</i><sub>c</sub>) were determined. The <i>HER</i> in a 0.5 mol dm<sup>−3</sup> H<sub>2</sub>SO<sub>4</sub> solution saturated with H<sub>2</sub> was confirmed as a reversible reaction having <i>z</i> = 2. When the above solution was injected with CO, the reversible <i>HER</i> changed to an irreversible reaction having <i>z</i> = 1 and <i>α</i><sub>c</sub> ≈ 0.6. Once we stopped the CO injection, alteration from the irreversible to quasireversible reaction was gradually made after several cyclic polarizations. The proposed curve techniques can provide a reliable way to determine the kinetic parameters changing among reversible, irreversible, and quasireversible reactions.
format	article
author	Osami Seri Kazunao Furumata
author_facet	Osami Seri Kazunao Furumata
author_sort	Osami Seri
title	Poisoning Effect of CO: How It Changes Hydrogen Electrode Reaction and How to Analyze It Using Differential Polarization Curve
title_short	Poisoning Effect of CO: How It Changes Hydrogen Electrode Reaction and How to Analyze It Using Differential Polarization Curve
title_full	Poisoning Effect of CO: How It Changes Hydrogen Electrode Reaction and How to Analyze It Using Differential Polarization Curve
title_fullStr	Poisoning Effect of CO: How It Changes Hydrogen Electrode Reaction and How to Analyze It Using Differential Polarization Curve
title_full_unstemmed	Poisoning Effect of CO: How It Changes Hydrogen Electrode Reaction and How to Analyze It Using Differential Polarization Curve
title_sort	poisoning effect of co: how it changes hydrogen electrode reaction and how to analyze it using differential polarization curve
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/a40d71a757eb427da88dfbf4fedd5a41
work_keys_str_mv	AT osamiseri poisoningeffectofcohowitchangeshydrogenelectrodereactionandhowtoanalyzeitusingdifferentialpolarizationcurve AT kazunaofurumata poisoningeffectofcohowitchangeshydrogenelectrodereactionandhowtoanalyzeitusingdifferentialpolarizationcurve
_version_	1718412730815217664

Poisoning Effect of CO: How It Changes Hydrogen Electrode Reaction and How to Analyze It Using Differential Polarization Curve

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