Quantification of Electrocatalytic Activity of Glassy Carbon Electrode

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F21%3A43923194" target="_blank" >RIV/60461373:22310/21:43923194 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0013468621004679?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0013468621004679?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.electacta.2021.138177" target="_blank" >10.1016/j.electacta.2021.138177</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Quantification of Electrocatalytic Activity of Glassy Carbon Electrode

Popis výsledku v původním jazyce

Despite the fact that carbon represents one of the most important electrode materials today, an electrocatalysis at its surfaces is far from being understood. In the present work, a detailed investigation of electrocatalytic properties of well characterised glassy carbon (GC) surfaces prepared by defined electrochemical activation procedure was performed. In order to achieve this goal, standard rate constants of various redox couples used as probes were correlated with the information about the electrodes surface composition. In particular, the GC electrode surface was characterised by Raman spectroscopy, water contact angle, 9,10-phenanthrenequinone adsorption and X-ray photoelectron spectroscopy. Standard rate constants of Fe 3 + /2 + , V 3 + /2 + , Eu 3 + /2 + , TEMPO + / ? and [Fe(CN) 6 ] 3-/4- redox couples were determined by cyclic voltammetry and scanning electrochemical microscopy. Results confirmed the importance of C = O moiety as a catalytic site for Fe 3 + /2 + and possibly also V 3 + /2 + and TEMPO + / ? couples. Negatively charged oxygencontaining surface species were suggested as novel catalytic sites for Eu 3 + /2 + . An evidence was found that a redox process of 1,4-benzoquinone/hydroquinone is catalysed by the very same surface species. However, the electrocatalysis in this case seems to be influenced also by the adsorption of these compounds at the electrode. Standard rate constant of [Fe(CN) 6 ] 3-/4- , often used as a probe for electrochemical testing of electrode surfaces, could not be correlated to any of the considered surface species. @&amp; nbsp;2021 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY license ( http://creativecommons.org/licenses/by/4.0/ )

Název v anglickém jazyce

Quantification of Electrocatalytic Activity of Glassy Carbon Electrode

Popis výsledku anglicky

Despite the fact that carbon represents one of the most important electrode materials today, an electrocatalysis at its surfaces is far from being understood. In the present work, a detailed investigation of electrocatalytic properties of well characterised glassy carbon (GC) surfaces prepared by defined electrochemical activation procedure was performed. In order to achieve this goal, standard rate constants of various redox couples used as probes were correlated with the information about the electrodes surface composition. In particular, the GC electrode surface was characterised by Raman spectroscopy, water contact angle, 9,10-phenanthrenequinone adsorption and X-ray photoelectron spectroscopy. Standard rate constants of Fe 3 + /2 + , V 3 + /2 + , Eu 3 + /2 + , TEMPO + / ? and [Fe(CN) 6 ] 3-/4- redox couples were determined by cyclic voltammetry and scanning electrochemical microscopy. Results confirmed the importance of C = O moiety as a catalytic site for Fe 3 + /2 + and possibly also V 3 + /2 + and TEMPO + / ? couples. Negatively charged oxygencontaining surface species were suggested as novel catalytic sites for Eu 3 + /2 + . An evidence was found that a redox process of 1,4-benzoquinone/hydroquinone is catalysed by the very same surface species. However, the electrocatalysis in this case seems to be influenced also by the adsorption of these compounds at the electrode. Standard rate constant of [Fe(CN) 6 ] 3-/4- , often used as a probe for electrochemical testing of electrode surfaces, could not be correlated to any of the considered surface species. @&amp; nbsp;2021 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY license ( http://creativecommons.org/licenses/by/4.0/ )

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Projekt

—

Návaznosti

O - Projekt operacniho programu

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Electrochimica Acta

ISSN

0013-4686

e-ISSN

—

Svazek periodika

379

Číslo periodika v rámci svazku

May 2021

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

—

Kód UT WoS článku

000638016200007

EID výsledku v databázi Scopus

2-s2.0-85103138122