Pseudo Single-Atom SiO x -Co Interfaces for Selectivity Control in Fischer-Tropsch Catalysis
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F25%3A43933760" target="_blank" >RIV/60461373:22310/25:43933760 - isvavai.cz</a>
Result on the web
<a href="https://pubs.acs.org/doi/10.1021/acscatal.5c05048" target="_blank" >https://pubs.acs.org/doi/10.1021/acscatal.5c05048</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/acscatal.5c05048" target="_blank" >10.1021/acscatal.5c05048</a>
Alternative languages
Result language
angličtina
Original language name
Pseudo Single-Atom SiO x -Co Interfaces for Selectivity Control in Fischer-Tropsch Catalysis
Original language description
Fischer-Tropsch synthesis (FTS) is a cornerstone catalytic process for converting synthesis gas into liquid hydrocarbons, yet it suffers from limited selectivity and excessive methane formation. Here, we demonstrate that surface modification of cobalt oxide (Co3O4) nanoparticles with trimethylchlorosilane (TMCS), followed by calcination, yields pseudo single-atom SiO x species that form a distinct SiO x -Co interface. Unlike conventional silica coatings, these isolated SiO x moieties are ligand-like, electronically modifying surface cobalt atoms, without forming bulk SiO2 or siloxane domains. This interface enhances pi-back-donation to carbon monoxide (CO), increases the heat of adsorption, and promotes CO bond cleavage, as confirmed by CO chemisorption and CO-temperature-programmed desorption (TPD). Catalysts modified in this way show over an order of magnitude increase in turnover frequency (TOF), alongside a marked decrease in methane selectivity and a shift toward C2-C5 hydrocarbons and oxygenates. These findings establish pseudo single-atom SiO x -Co interfaces as a powerful route to engineer activity and selectivity in FTS. Importantly, the approach avoids chlorine residues and is consistent with Cl removal during calcination. Beyond suppressing methane, the SiO x interface selectively promotes aldehydes, aligning with recent reports on oxide-modified Co catalysts. Pseudo single-atom oxide-metal interfaces emerge as a tunable strategy for enhancing both activity and selectivity in cobalt-based FTS catalysts.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10400 - Chemical sciences
Result continuities
Project
—
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
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
2155-5435
Volume of the periodical
15
Issue of the periodical within the volume
24
Country of publishing house
US - UNITED STATES
Number of pages
11
Pages from-to
20573-20583
UT code for WoS article
001628393300001
EID of the result in the Scopus database
2-s2.0-105023398259