(Sn, Fe)/Mg/Zn/Al hydrotalcites as efficient catalysts for Baeyer-Villiger oxidation of aldehydes with cyclic structures: Role of composition and surface properties

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F44555601%3A13440%2F25%3A43899180" target="_blank" >RIV/44555601:13440/25:43899180 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22310/25:43931822

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0926860X2500314X?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0926860X2500314X?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.apcata.2025.120413" target="_blank" >10.1016/j.apcata.2025.120413</a>

Jazyk výsledku

angličtina

Název v původním jazyce

(Sn, Fe)/Mg/Zn/Al hydrotalcites as efficient catalysts for Baeyer-Villiger oxidation of aldehydes with cyclic structures: Role of composition and surface properties

Popis výsledku v původním jazyce

Mixed oxides derived from MgAl, ZnAl, and MgZnAl hydrotalcites were prepared and modified with tin and iron using co-precipitation and impregnation methods. Comprehensive characterization by XRD, XRF, BET, TPD, TGA, SEM, and EDX revealed that metal composition and method of modification strongly influenced crystallinity, surface area, and acid-base properties. Tin incorporation increased acidity and basicity, while iron reduced both, with structural impacts varying by matrix. The catalysts were tested in the Baeyer-Villiger oxidation of myrtenal and beta-cyclocitral. ZnAl-based oxides showed the highest conversion and selectivity (almost total conversion of both starting substances after 5 h of the reaction, with selectivity to nopinone reaching approximately 95 % and selectivity to the products of J3-cyclocitral oxidation around 70 %, predominantly yielding formate), while tin-modified MgAl catalysts provided stable performance with enhanced selectivity. Substrate structure significantly influenced product distribution, with myrtenal favouring oxidation-hydrolysis pathways and J3-cyclocitral undergoing additional reduction. Reusability studies demonstrated excellent stability of SnMgAl catalysts over three consecutive reaction cycles, with minimal leaching and full recovery of crystallinity after recalcination. In contrast, SnZnAl catalysts showed gradual deactivation, especially when tin was introduced via impregnation. The study highlights the importance of fine-tuning acid-base and structural properties of mixed oxides through metal incorporation and preparation method. The findings offer valuable insights into the rational design of robust and selective catalysts for Baeyer-Villiger oxidations.

Název v anglickém jazyce

(Sn, Fe)/Mg/Zn/Al hydrotalcites as efficient catalysts for Baeyer-Villiger oxidation of aldehydes with cyclic structures: Role of composition and surface properties

Popis výsledku anglicky

Mixed oxides derived from MgAl, ZnAl, and MgZnAl hydrotalcites were prepared and modified with tin and iron using co-precipitation and impregnation methods. Comprehensive characterization by XRD, XRF, BET, TPD, TGA, SEM, and EDX revealed that metal composition and method of modification strongly influenced crystallinity, surface area, and acid-base properties. Tin incorporation increased acidity and basicity, while iron reduced both, with structural impacts varying by matrix. The catalysts were tested in the Baeyer-Villiger oxidation of myrtenal and beta-cyclocitral. ZnAl-based oxides showed the highest conversion and selectivity (almost total conversion of both starting substances after 5 h of the reaction, with selectivity to nopinone reaching approximately 95 % and selectivity to the products of J3-cyclocitral oxidation around 70 %, predominantly yielding formate), while tin-modified MgAl catalysts provided stable performance with enhanced selectivity. Substrate structure significantly influenced product distribution, with myrtenal favouring oxidation-hydrolysis pathways and J3-cyclocitral undergoing additional reduction. Reusability studies demonstrated excellent stability of SnMgAl catalysts over three consecutive reaction cycles, with minimal leaching and full recovery of crystallinity after recalcination. In contrast, SnZnAl catalysts showed gradual deactivation, especially when tin was introduced via impregnation. The study highlights the importance of fine-tuning acid-base and structural properties of mixed oxides through metal incorporation and preparation method. The findings offer valuable insights into the rational design of robust and selective catalysts for Baeyer-Villiger oxidations.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10401 - Organic chemistry

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Applied Catalysis A-General

ISSN

0926-860X

e-ISSN

1873-3875

Svazek periodika

2025

Číslo periodika v rámci svazku

704

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

15

Strana od-do

"nestrankovano"

Kód UT WoS článku

001519844300001

EID výsledku v databázi Scopus

—