Electrochemical kinetics as a function of transition metal dichalcogenide thickness

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F21%3A00545412" target="_blank" >RIV/61388955:_____/21:00545412 - isvavai.cz</a>

Výsledek na webu

<a href="http://hdl.handle.net/11104/0322106" target="_blank" >http://hdl.handle.net/11104/0322106</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.electacta.2021.139027" target="_blank" >10.1016/j.electacta.2021.139027</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Electrochemical kinetics as a function of transition metal dichalcogenide thickness

Popis výsledku v původním jazyce

Two-dimensional transition metal dichalcogenides are used as electroactive materials for electrochemical and electrocatalytic applications. However, it remains unclear how transition metal dichalcogenide thickness influences the electrochemical response measured at its surface. We use scanning electrochemical cell microscopy to assess the electrochemical response of different thicknesses of bottom-contacted MoS2, MoSe2, WS2, and WSe2 towards the simple outer-sphere redox couple [Ru(NH3)(6)](3+/2+) with submicron spatial resolution. A detailed analysis, coupling mass transport and electrochemical kinetics, reveals that the electrochemical response can be described using an electron tunneling barrier, which scales with the band gap of the two-dimensional transition metal dichalcogenide. Our results suggest that interpretation of the electrochemical and electrocatalytic responses on transition metal dichalcogenide-covered electrodes should account for the through-layer electron transport kinetics. (C) 2021 Elsevier Ltd. All rights reserved.

Název v anglickém jazyce

Electrochemical kinetics as a function of transition metal dichalcogenide thickness

Popis výsledku anglicky

Two-dimensional transition metal dichalcogenides are used as electroactive materials for electrochemical and electrocatalytic applications. However, it remains unclear how transition metal dichalcogenide thickness influences the electrochemical response measured at its surface. We use scanning electrochemical cell microscopy to assess the electrochemical response of different thicknesses of bottom-contacted MoS2, MoSe2, WS2, and WSe2 towards the simple outer-sphere redox couple [Ru(NH3)(6)](3+/2+) with submicron spatial resolution. A detailed analysis, coupling mass transport and electrochemical kinetics, reveals that the electrochemical response can be described using an electron tunneling barrier, which scales with the band gap of the two-dimensional transition metal dichalcogenide. Our results suggest that interpretation of the electrochemical and electrocatalytic responses on transition metal dichalcogenide-covered electrodes should account for the through-layer electron transport kinetics. (C) 2021 Elsevier Ltd. All rights reserved.

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

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

1873-3859

Svazek periodika

393

Číslo periodika v rámci svazku

OCT 2021

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

9

Strana od-do

139027

Kód UT WoS článku

000692096000005

EID výsledku v databázi Scopus

2-s2.0-85112776271