Heteroatom sulfur-doping in single-atom Fe-NC catalysts for durable oxygen reduction reaction in both alkaline and acidic media

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27710%2F23%3A10252885" target="_blank" >RIV/61989100:27710/23:10252885 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.webofscience.com/wos/woscc/full-record/WOS:001024243200001" target="_blank" >https://www.webofscience.com/wos/woscc/full-record/WOS:001024243200001</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/d3ta02712k" target="_blank" >10.1039/d3ta02712k</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Heteroatom sulfur-doping in single-atom Fe-NC catalysts for durable oxygen reduction reaction in both alkaline and acidic media

Popis výsledku v původním jazyce

The need for highly efficient and economical Pt-free oxygen reduction reaction (ORR) electrocatalysts has led to the rapid development of single-atom transition metals anchored on heteroatom-doped carbon catalysts. However, their activity and stability remain below the requirements for practical applications. Herein, we propose a heteroatom (S)-doped hollow atomically dispersed Fe-N-C catalyst (H-S-Fe-NC) synthesized through a two-step thermal activation process. Compared with the un-doped Fe-N-C catalyst, the optimized H-S-Fe-NC catalysts display exceptional ORR activity and stability, achieving a high half-wave potential of 0.91 V in alkaline solution and 0.78 V in acidic solution, respectively. Combined experimental and theoretical results reveal the enhanced ORR activity of H-S-Fe-NC to be boosted by the introduction of S, which moderates the adsorption energy of the oxygen intermediates. Furthermore, we expand the application of the H-S-Fe-NC catalysts by using them in a zinc-air battery and proton-exchange membrane fuel cell.

Název v anglickém jazyce

Heteroatom sulfur-doping in single-atom Fe-NC catalysts for durable oxygen reduction reaction in both alkaline and acidic media

Popis výsledku anglicky

The need for highly efficient and economical Pt-free oxygen reduction reaction (ORR) electrocatalysts has led to the rapid development of single-atom transition metals anchored on heteroatom-doped carbon catalysts. However, their activity and stability remain below the requirements for practical applications. Herein, we propose a heteroatom (S)-doped hollow atomically dispersed Fe-N-C catalyst (H-S-Fe-NC) synthesized through a two-step thermal activation process. Compared with the un-doped Fe-N-C catalyst, the optimized H-S-Fe-NC catalysts display exceptional ORR activity and stability, achieving a high half-wave potential of 0.91 V in alkaline solution and 0.78 V in acidic solution, respectively. Combined experimental and theoretical results reveal the enhanced ORR activity of H-S-Fe-NC to be boosted by the introduction of S, which moderates the adsorption energy of the oxygen intermediates. Furthermore, we expand the application of the H-S-Fe-NC catalysts by using them in a zinc-air battery and proton-exchange membrane fuel cell.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10400 - Chemical sciences

Projekt

—

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

Journal of Materials Chemistry A

ISSN

2050-7488

e-ISSN

2050-7496

Svazek periodika

11

Číslo periodika v rámci svazku

30

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

16180-16189

Kód UT WoS článku

001024243200001

EID výsledku v databázi Scopus

2-s2.0-85166290168