Improving C-N-FeOx Oxygen Evolution Electrocatalysts through Hydroxyl-Modulated Local Coordination Environment
The result's identifiers
Result code in 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>
Alternative codes found
RIV/61989592:15640/22:73618693
Result on the web
<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>
Alternative languages
Result language
angličtina
Original language name
Improving C-N-FeOx Oxygen Evolution Electrocatalysts through Hydroxyl-Modulated Local Coordination Environment
Original language description
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.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)
Result continuities
Project
<a href="/en/project/GC20-16124J" target="_blank" >GC20-16124J: Two-dimensional layered transition metal dichalcogenides/ nanostructured carbons composites for electrochemical energy storage and conversion</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
ACS Catalysis
ISSN
2155-5435
e-ISSN
—
Volume of the periodical
12
Issue of the periodical within the volume
12
Country of publishing house
US - UNITED STATES
Number of pages
10
Pages from-to
7443-7452
UT code for WoS article
000813581000001
EID of the result in the Scopus database
2-s2.0-85134403344