Metallocene Voltammetric Reference Related to a Normal Hydrogen Electrode

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15110%2F25%3A73633886" target="_blank" >RIV/61989592:15110/25:73633886 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216224:14310/25:00140797

Výsledek na webu

<a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC11912535/pdf/jz4c03390.pdf" target="_blank" >https://pmc.ncbi.nlm.nih.gov/articles/PMC11912535/pdf/jz4c03390.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acs.jpclett.4c03390" target="_blank" >10.1021/acs.jpclett.4c03390</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Metallocene Voltammetric Reference Related to a Normal Hydrogen Electrode

Popis výsledku v původním jazyce

The potentials of electrochemical processes in ideal aqueous media are related to the potential of a normal hydrogen electrode (NHE). However, in non-ideal media, the potentials of a metallocene redox couple are used as a reference. Such measurements with free metallocene in solution are complicated by adsorption and mass transport phenomena and solvation effects. Herein, a platinum electrode with an anchored ferrocene moiety (Pt,Fc) was used for cyclic voltammetric measurements of the potential of ferrocene/ferrocenium (Fc/Fc+) redox transformation in not only non-aqueous but, for the first time, aqueous solutions as well. This enabled us to eliminate the aforementioned problems associated with the application of free metallocene molecules in solution and, thus, to relate the midpoint potential (Epm) of the Fc/Fc+ redox couple to a NHE. After elimination of the liquid junction potential in an aqueous 0.1 M KCl solution at 25 °C, the average intraday Epm value obtained with freshly prepared Pt,Fc electrodes was found to be 0.312 ± 0.008 V versus the secondary Ag|AgCl electrode. The Pt,Fc electrode can be applied for the standardization of electrochemical measurements and investigation of solvation phenomena at interfaces in non-ideal media.

Název v anglickém jazyce

Metallocene Voltammetric Reference Related to a Normal Hydrogen Electrode

Popis výsledku anglicky

The potentials of electrochemical processes in ideal aqueous media are related to the potential of a normal hydrogen electrode (NHE). However, in non-ideal media, the potentials of a metallocene redox couple are used as a reference. Such measurements with free metallocene in solution are complicated by adsorption and mass transport phenomena and solvation effects. Herein, a platinum electrode with an anchored ferrocene moiety (Pt,Fc) was used for cyclic voltammetric measurements of the potential of ferrocene/ferrocenium (Fc/Fc+) redox transformation in not only non-aqueous but, for the first time, aqueous solutions as well. This enabled us to eliminate the aforementioned problems associated with the application of free metallocene molecules in solution and, thus, to relate the midpoint potential (Epm) of the Fc/Fc+ redox couple to a NHE. After elimination of the liquid junction potential in an aqueous 0.1 M KCl solution at 25 °C, the average intraday Epm value obtained with freshly prepared Pt,Fc electrodes was found to be 0.312 ± 0.008 V versus the secondary Ag|AgCl electrode. The Pt,Fc electrode can be applied for the standardization of electrochemical measurements and investigation of solvation phenomena at interfaces in non-ideal media.

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

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Journal of Physical Chemistry Letters

ISSN

1948-7185

e-ISSN

—

Svazek periodika

16

Číslo periodika v rámci svazku

10

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

5

Strana od-do

2487-2491

Kód UT WoS článku

001435159500001

EID výsledku v databázi Scopus

2-s2.0-86000144343