Mechanochemical-Driven Uniformly Dispersed Monatomic Fe-NX Coordination in Carbon for Facilitating Efficient Oxygen Reduction Reaction

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27710%2F22%3A10250346" target="_blank" >RIV/61989100:27710/22:10250346 - isvavai.cz</a>

Výsledek na webu

<a href="https://pubs.acs.org/doi/10.1021/acssuschemeng.2c01010" target="_blank" >https://pubs.acs.org/doi/10.1021/acssuschemeng.2c01010</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acssuschemeng.2c01010" target="_blank" >10.1021/acssuschemeng.2c01010</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Mechanochemical-Driven Uniformly Dispersed Monatomic Fe-NX Coordination in Carbon for Facilitating Efficient Oxygen Reduction Reaction

Popis výsledku v původním jazyce

The need for highly efficient and economical non-Pt electrocatalysts for facilitating the oxygen reduction reaction (ORR) has led to the development of atomically dispersed transition-metal- and nitrogen-doped carbon electrocatalysts. However, this task remains challenging due to the metal components&apos; easy aggregation. The present work addresses this issue by presenting a viable mechanochemical strategy for synthesizing highly dispersed monatomic Fe-Nx coordination in carbon (MFe-NC) electrocatalysts using Fe-zeolitic imidazolate framework precursors. Benefiting from the high density of Fe-Nx coordination, the as-synthesized MFe-NC catalyst exhibits remarkable electrochemical performance toward ORR with greater activity, selectivity, and durability than the commercial Pt/C electrocatalyst. Applying MFe-NC as the catalyst for a Zn-air battery cathode, a high peak power density of 302 mW cm-2 has been achieved. The specific mechanism facilitating the ORR process is unveiled by density functional theory calculations: the favoring of monatomic Fe-N4 sites for the adsorption of intermediate species during the reaction contributes mainly to the high ORR activity.

Název v anglickém jazyce

Mechanochemical-Driven Uniformly Dispersed Monatomic Fe-NX Coordination in Carbon for Facilitating Efficient Oxygen Reduction Reaction

Popis výsledku anglicky

The need for highly efficient and economical non-Pt electrocatalysts for facilitating the oxygen reduction reaction (ORR) has led to the development of atomically dispersed transition-metal- and nitrogen-doped carbon electrocatalysts. However, this task remains challenging due to the metal components&apos; easy aggregation. The present work addresses this issue by presenting a viable mechanochemical strategy for synthesizing highly dispersed monatomic Fe-Nx coordination in carbon (MFe-NC) electrocatalysts using Fe-zeolitic imidazolate framework precursors. Benefiting from the high density of Fe-Nx coordination, the as-synthesized MFe-NC catalyst exhibits remarkable electrochemical performance toward ORR with greater activity, selectivity, and durability than the commercial Pt/C electrocatalyst. Applying MFe-NC as the catalyst for a Zn-air battery cathode, a high peak power density of 302 mW cm-2 has been achieved. The specific mechanism facilitating the ORR process is unveiled by density functional theory calculations: the favoring of monatomic Fe-N4 sites for the adsorption of intermediate species during the reaction contributes mainly to the high ORR activity.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

20400 - Chemical engineering

Projekt

—

Návaznosti

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

ACS Sustainable Chemistry and Engineering

ISSN

2168-0485

e-ISSN

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Svazek periodika

10

Číslo periodika v rámci svazku

23

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

11

Strana od-do

7553-7563

Kód UT WoS článku

000811366700001

EID výsledku v databázi Scopus

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