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

Result code in 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>
Alternative codes found
RIV/00216275:25310/23:39920419
Result on the web
<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>

Result language
angličtina
Original language name
Mechanisms of Degradation of Na2Ni[Fe(CN)(6)] Functional Electrodes in Aqueous Media: A Combined Theoretical and Experimental Study
Original language description
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.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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