Atomically Dispersed Cerium Sites Immobilized on Vanadium Vacancies of Monolayer Nickel-Vanadium Layered Double Hydroxide: Accelerating Water Splitting Kinetics

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27710%2F23%3A10253522" target="_blank" >RIV/61989100:27710/23:10253522 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.scopus.com/record/display.uri?eid=2-s2.0-85174973946&origin=resultslist&sort=plf-f&src=s&sid=881db3789ccc847267fb37586bc37fff&sot=b&sdt=cl&s=AUTHOR-NAME%28M.H.+rummeli%29&sl=25&sessionSearchId=881db3789ccc847267fb37586bc37fff&relpos=18#funding-details" target="_blank" >https://www.scopus.com/record/display.uri?eid=2-s2.0-85174973946&origin=resultslist&sort=plf-f&src=s&sid=881db3789ccc847267fb37586bc37fff&sot=b&sdt=cl&s=AUTHOR-NAME%28M.H.+rummeli%29&sl=25&sessionSearchId=881db3789ccc847267fb37586bc37fff&relpos=18#funding-details</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/adfm.202308533" target="_blank" >10.1002/adfm.202308533</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Atomically Dispersed Cerium Sites Immobilized on Vanadium Vacancies of Monolayer Nickel-Vanadium Layered Double Hydroxide: Accelerating Water Splitting Kinetics

Popis výsledku v původním jazyce

Rational design of efficient single-atom catalysts is a potential avenue to mitigate the sluggish oxygen evolution reaction (OER) kinetics. Adopting appropriate matrixes to stabilize the single-atom active centers with the optimized geometric and electronic structure plays an essential role in enhancing catalytic activities. Herein, massive isolated Ce atoms are successfully anchored on monolayer nickel-vanadium layered double hydroxide support (Ce SAs/m-NiV LDH) via the vanadium defects trapping strategy, resulting in stabilized Ce single-atom with the maximum loading of 8.07 wt.%. Benefitting from the strong synergetic electronic interaction between Ce single atoms and monolayer NiV LDH matrix, thus-prepared catalyst possesses favorable OER (209 mV @ 10 mA cm-2) and water electrolysis performance (1.47 V @ 10 mA cm-2), surpassing other catalysts and even the commercial RuO2 catalyst. Density functional theory (DFT) calculations in combination with in situ electrochemical impedance spectroscopy analysis reveal that the immobilization of monatomic Ce can effectively narrow the band gap and strengthen the density states near the Fermi level as well as more easily adsorb the surficial OH-, leading to a lower charge transfer barrier and faster water splitting kinetics. The novel V vacancies trapped Ce single-atom catalyst is successfully constructed on the monolayer nickel-vanadium layered double hydroxide (NiV LDH). The physicochemical characterization and theoretical calculations demonstrate that the incorporation of single Ce atoms delivers a positive effect. Specifically, the synergistic effect results from the strong electronic coupling interactions between the Ce single-atom and monolayer NiV LDH matrix inducing an enhanced water electrolysis kinetics.image

Název v anglickém jazyce

Atomically Dispersed Cerium Sites Immobilized on Vanadium Vacancies of Monolayer Nickel-Vanadium Layered Double Hydroxide: Accelerating Water Splitting Kinetics

Popis výsledku anglicky

Rational design of efficient single-atom catalysts is a potential avenue to mitigate the sluggish oxygen evolution reaction (OER) kinetics. Adopting appropriate matrixes to stabilize the single-atom active centers with the optimized geometric and electronic structure plays an essential role in enhancing catalytic activities. Herein, massive isolated Ce atoms are successfully anchored on monolayer nickel-vanadium layered double hydroxide support (Ce SAs/m-NiV LDH) via the vanadium defects trapping strategy, resulting in stabilized Ce single-atom with the maximum loading of 8.07 wt.%. Benefitting from the strong synergetic electronic interaction between Ce single atoms and monolayer NiV LDH matrix, thus-prepared catalyst possesses favorable OER (209 mV @ 10 mA cm-2) and water electrolysis performance (1.47 V @ 10 mA cm-2), surpassing other catalysts and even the commercial RuO2 catalyst. Density functional theory (DFT) calculations in combination with in situ electrochemical impedance spectroscopy analysis reveal that the immobilization of monatomic Ce can effectively narrow the band gap and strengthen the density states near the Fermi level as well as more easily adsorb the surficial OH-, leading to a lower charge transfer barrier and faster water splitting kinetics. The novel V vacancies trapped Ce single-atom catalyst is successfully constructed on the monolayer nickel-vanadium layered double hydroxide (NiV LDH). The physicochemical characterization and theoretical calculations demonstrate that the incorporation of single Ce atoms delivers a positive effect. Specifically, the synergistic effect results from the strong electronic coupling interactions between the Ce single-atom and monolayer NiV LDH matrix inducing an enhanced water electrolysis kinetics.image

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

10400 - Chemical sciences

Projekt

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Návaznosti

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Advanced Functional Materials

ISSN

1616-301X

e-ISSN

1616-3028

Svazek periodika

2023

Číslo periodika v rámci svazku

16.12.2023

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

10

Strana od-do

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Kód UT WoS článku

001090666200001

EID výsledku v databázi Scopus

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