Mechanisms of Degradation of Na2Ni[Fe(CN)(6)] Functional Electrodes in Aqueous Media: A Combined Theoretical and Experimental Study

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F23%3APU148473" target="_blank" >RIV/00216305:26620/23:PU148473 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216275:25310/23:39920419

Výsledek na webu

<a href="https://pubs.acs.org/doi/full/10.1021/acs.jpcc.2c08222" target="_blank" >https://pubs.acs.org/doi/full/10.1021/acs.jpcc.2c08222</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acs.jpcc.2c08222" target="_blank" >10.1021/acs.jpcc.2c08222</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Mechanisms of Degradation of Na2Ni[Fe(CN)(6)] Functional Electrodes in Aqueous Media: A Combined Theoretical and Experimental Study

Popis výsledku v původním jazyce

Prussian blue analogues (PBAs) are versatile functional materials with numerous applications ranging from electrocatalysis and batteries to sensors and electrochromic devices. stability strongly depends on the electrolyte composition. In this work, we use density functional theory calculations and experiments to elucidate the mechanisms of degradation of model Na2Ni[Fe(CN)(6)] functional electrodes in aqueous electrolytes. Next to the solution pH and cation concentration, we identify anion adsorption as a major driving force for electrode dissolution. Notably, the nature of adsorbed anions can control the mass and charge transfer mechanisms during metal cation intercalation as well as the electrode degradation rate. We find that weakly adsorbing anions, such as NO3-, impede the degradation, while strongly adsorbing anions, such as SO42-, accelerate it. The results of this study provide practical guidelines for electrolyte optimization and can likely be extrapolated to the whole family of PBAs operating in aqueous media.

Název v anglickém jazyce

Mechanisms of Degradation of Na2Ni[Fe(CN)(6)] Functional Electrodes in Aqueous Media: A Combined Theoretical and Experimental Study

Popis výsledku anglicky

Prussian blue analogues (PBAs) are versatile functional materials with numerous applications ranging from electrocatalysis and batteries to sensors and electrochromic devices. stability strongly depends on the electrolyte composition. In this work, we use density functional theory calculations and experiments to elucidate the mechanisms of degradation of model Na2Ni[Fe(CN)(6)] functional electrodes in aqueous electrolytes. Next to the solution pH and cation concentration, we identify anion adsorption as a major driving force for electrode dissolution. Notably, the nature of adsorbed anions can control the mass and charge transfer mechanisms during metal cation intercalation as well as the electrode degradation rate. We find that weakly adsorbing anions, such as NO3-, impede the degradation, while strongly adsorbing anions, such as SO42-, accelerate it. The results of this study provide practical guidelines for electrolyte optimization and can likely be extrapolated to the whole family of PBAs operating in aqueous 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

2023

Kód důvěrnosti údajů

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

Název periodika

Journal of Physical Chemistry C (web)

ISSN

1932-7447

e-ISSN

1932-7455

Svazek periodika

127

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

11

Strana od-do

2204-2214

Kód UT WoS článku

000937239300001

EID výsledku v databázi Scopus

2-s2.0-85147285922