Improving C-N-FeOx Oxygen Evolution Electrocatalysts through Hydroxyl-Modulated Local Coordination Environment

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F22%3A43924178" target="_blank" >RIV/60461373:22310/22:43924178 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989592:15640/22:73618693

Výsledek na webu

<a href="https://pubs.acs.org/doi/full/10.1021/acscatal.2c01153" target="_blank" >https://pubs.acs.org/doi/full/10.1021/acscatal.2c01153</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acscatal.2c01153" target="_blank" >10.1021/acscatal.2c01153</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Improving C-N-FeOx Oxygen Evolution Electrocatalysts through Hydroxyl-Modulated Local Coordination Environment

Popis výsledku v původním jazyce

Ultrafine FeOx in the sub-nanometric or atomic scale is one of the promising catalysts for boosted oxygen evolution reaction (OER) activity, although there is further potential for improvement in comparison to commercial catalysts. Recent studies show that hydroxyl modification on the surface of catalysts can ameliorate hydrophilicity and catalytic activity, thus helping to bring such catalysts closer to scale-up and commercialization stages. To deeply understand the effect of hydroxyl, atomic-level dispersed FeOx in porous carbon nitride (CN-FeOx) was proposed through a spatially confined approach, which involved an in situ coordination effect between resorcinol and Fe ions. After hydroxyl modification, the generated CN-FeOx-OH hybrid material displayed significantly enhanced mass activity compared to CN-FeOx and commercial RuO2 (0.16 A/mgmetal) under an overpotential of 350 mV versus RHE. Additionally, the improved stability of CNFeOx-OH suppresses migration and aggregation. The DFT calculations revealed a distinct catalytic mechanism in which the active center composed of multisites modified by hydroxyl exhibited a strong synergistic effect to modulate the adsorption behaviors of OH and O intermediates, which possessed the optimal adsorption energy for enhanced activity as compared with a single site in the CN-FeOx-OH and CN-FeOx, respectively. The adopted strategies in this paper can effectively promote the application of Fe-based catalysts in OER.

Název v anglickém jazyce

Improving C-N-FeOx Oxygen Evolution Electrocatalysts through Hydroxyl-Modulated Local Coordination Environment

Popis výsledku anglicky

Ultrafine FeOx in the sub-nanometric or atomic scale is one of the promising catalysts for boosted oxygen evolution reaction (OER) activity, although there is further potential for improvement in comparison to commercial catalysts. Recent studies show that hydroxyl modification on the surface of catalysts can ameliorate hydrophilicity and catalytic activity, thus helping to bring such catalysts closer to scale-up and commercialization stages. To deeply understand the effect of hydroxyl, atomic-level dispersed FeOx in porous carbon nitride (CN-FeOx) was proposed through a spatially confined approach, which involved an in situ coordination effect between resorcinol and Fe ions. After hydroxyl modification, the generated CN-FeOx-OH hybrid material displayed significantly enhanced mass activity compared to CN-FeOx and commercial RuO2 (0.16 A/mgmetal) under an overpotential of 350 mV versus RHE. Additionally, the improved stability of CNFeOx-OH suppresses migration and aggregation. The DFT calculations revealed a distinct catalytic mechanism in which the active center composed of multisites modified by hydroxyl exhibited a strong synergistic effect to modulate the adsorption behaviors of OH and O intermediates, which possessed the optimal adsorption energy for enhanced activity as compared with a single site in the CN-FeOx-OH and CN-FeOx, respectively. The adopted strategies in this paper can effectively promote the application of Fe-based catalysts in OER.

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

<a href="/cs/project/GC20-16124J" target="_blank" >GC20-16124J: Dvojdimenzionální vrstevnaté dichalkogenidy přechodných kovů / nanostrukturované uhlíkové kompozity pro aplikace na elektrochemické uchovávání energie</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

ACS Catalysis

ISSN

2155-5435

e-ISSN

—

Svazek periodika

12

Číslo periodika v rámci svazku

12

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

10

Strana od-do

7443-7452

Kód UT WoS článku

000813581000001

EID výsledku v databázi Scopus

2-s2.0-85134403344