Surface electron transfer enhanced by molecular oxygen: Droplet and bulk mode experiments on boron-doped diamond electrodes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26220%2F26%3A0199328" target="_blank" >RIV/00216305:26220/26:0199328 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216224:14310/25:00142458 RIV/00216275:25310/25:39922869

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S1572665725004035?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1572665725004035?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jelechem.2025.119329" target="_blank" >10.1016/j.jelechem.2025.119329</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Surface electron transfer enhanced by molecular oxygen: Droplet and bulk mode experiments on boron-doped diamond electrodes

Popis výsledku v původním jazyce

The three-electrode screen printed boron-doped diamond (SP/BDD) sensor fabricated by chemical vapor deposition (CVD) on an alumina substrate allowed testing its different electroanalytical performance in terms of: (1) the termination of the SP/BDDE surface (H- or O-termination), (2) the immersion mode of the SP/BDDE in the analyte solution (B - bulk mode) and in the drop experiment (D - drop mode), and (3) the presence and absence of atmospheric oxygen. The electrochemical methods (CV - cyclic voltammetry, EVLS - elimination voltammetry with linear scan, EIS - electrochemical impedance spectroscopy) were complemented by methods that characterize the surface properties of the electrode material (Raman spectroscopy, SEM - scanning electron microscopy, XPS - X-ray photoelectron spectroscopy, OCA - optical contact angle). Mott-Schottky analysis demonstrated a higher density of free charge carriers and a closer localization of the valence band (VB) to Fermi level for Htermination than for O-termination of surfaces, therefore further experiments were performed on the H-terminated SP/BDDE. The B and D mode tests in the absence and presence of atmospheric oxygen using the redox probe [Fe(CN)6]3- /4- demonstrated a significant difference in both the heterogeneous charge transfer rate constants and charge transfer resistance values. The H-terminated SP/BDDE surface and the D-mode experiment in the presence of O2 provided the best electroanalytical performance of this screen-printed diamond electrode. The O2-enhanced surface electron transfer was discussed in the context of the electrochemical potential model of boron-doped diamond and the used electrolyte.

Název v anglickém jazyce

Surface electron transfer enhanced by molecular oxygen: Droplet and bulk mode experiments on boron-doped diamond electrodes

Popis výsledku anglicky

The three-electrode screen printed boron-doped diamond (SP/BDD) sensor fabricated by chemical vapor deposition (CVD) on an alumina substrate allowed testing its different electroanalytical performance in terms of: (1) the termination of the SP/BDDE surface (H- or O-termination), (2) the immersion mode of the SP/BDDE in the analyte solution (B - bulk mode) and in the drop experiment (D - drop mode), and (3) the presence and absence of atmospheric oxygen. The electrochemical methods (CV - cyclic voltammetry, EVLS - elimination voltammetry with linear scan, EIS - electrochemical impedance spectroscopy) were complemented by methods that characterize the surface properties of the electrode material (Raman spectroscopy, SEM - scanning electron microscopy, XPS - X-ray photoelectron spectroscopy, OCA - optical contact angle). Mott-Schottky analysis demonstrated a higher density of free charge carriers and a closer localization of the valence band (VB) to Fermi level for Htermination than for O-termination of surfaces, therefore further experiments were performed on the H-terminated SP/BDDE. The B and D mode tests in the absence and presence of atmospheric oxygen using the redox probe [Fe(CN)6]3- /4- demonstrated a significant difference in both the heterogeneous charge transfer rate constants and charge transfer resistance values. The H-terminated SP/BDDE surface and the D-mode experiment in the presence of O2 provided the best electroanalytical performance of this screen-printed diamond electrode. The O2-enhanced surface electron transfer was discussed in the context of the electrochemical potential model of boron-doped diamond and the used electrolyte.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Journal of Electroanalytical Chemistry

ISSN

1572-6657

e-ISSN

1873-2569

Svazek periodika

—

Číslo periodika v rámci svazku

119329

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

12

Strana od-do

1-12

Kód UT WoS článku

001547953000001

EID výsledku v databázi Scopus

—