Monolithic TiO2-CeO2 and Pt/TiO2-CeO2@VUKOPOR®A foams in oxidation of dichloromethane and methanol

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27710%2F25%3A10257731" target="_blank" >RIV/61989100:27710/25:10257731 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S2213343725017075?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2213343725017075?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jece.2025.117011" target="_blank" >10.1016/j.jece.2025.117011</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Monolithic TiO2-CeO2 and Pt/TiO2-CeO2@VUKOPOR®A foams in oxidation of dichloromethane and methanol

Popis výsledku v původním jazyce

TiO2-CeO2@VUKOPOR®A foam and Pt/TiO2-CeO2@VUKOPOR®A foam were prepared via using a simple reverse micelles-assisted sol-gel method, dip-coating and calcination and were investigated in oxidation of two VOCs - dichloromethane and methanol. In dichloromethane oxidation, Pt/TiO2-CeO2@VUKOPOR®A foam showed improved CO2 selectivity compared to TiO2-CeO2@VUKOPOR®A foam, while their activity and HCl selectivity were comparable. Impregnated PtOx species were responsible for higher reducibility of Pt/TiO2-CeO2@VUKOPOR®A foam leading to higher CO2 yield. In methanol oxidation, Pt/TiO2-CeO2@VUKOPOR®A foam showed improved catalytic activity as well as CO2 selectivity compared to TiO2-CeO2@VUKOPOR®A foam. A weak Lewis acidity and high weak basicity of TiO2-CeO2 support and well-reducible PtOx species in Pt/TiO2-CeO2@VUKOPOR®A foam were responsible for its improved catalytic efficiency. Overall comparison with other reported commercial and laboratory-prepared catalysts revealed that in dichloromethane oxidation the developed Pt/TiO2-CeO2@VUKOPOR®A foam and TiO2-CeO2@VUKOPOR®A foam did not exceed the catalytic activity of alumina-based commercial monolithic and granulated catalysts, but showed satisfactory HCl selectivity (70% at T80). Lower catalytic activity of TiO2-CeO2-based catalytic foams can be attributed to insufficient acidity (missing medium and strong Brönsted acidity) of TiO2-CeO2 support. In methanol oxidation, Pt/TiO2 CeO2@VUKOPOR®A foam as well as TiO2-CeO2@VUKOPOR®A foam showed lower catalytic activity and CO2 selectivity than CuO-containing@VUKOPOR®A foams.

Název v anglickém jazyce

Monolithic TiO2-CeO2 and Pt/TiO2-CeO2@VUKOPOR®A foams in oxidation of dichloromethane and methanol

Popis výsledku anglicky

TiO2-CeO2@VUKOPOR®A foam and Pt/TiO2-CeO2@VUKOPOR®A foam were prepared via using a simple reverse micelles-assisted sol-gel method, dip-coating and calcination and were investigated in oxidation of two VOCs - dichloromethane and methanol. In dichloromethane oxidation, Pt/TiO2-CeO2@VUKOPOR®A foam showed improved CO2 selectivity compared to TiO2-CeO2@VUKOPOR®A foam, while their activity and HCl selectivity were comparable. Impregnated PtOx species were responsible for higher reducibility of Pt/TiO2-CeO2@VUKOPOR®A foam leading to higher CO2 yield. In methanol oxidation, Pt/TiO2-CeO2@VUKOPOR®A foam showed improved catalytic activity as well as CO2 selectivity compared to TiO2-CeO2@VUKOPOR®A foam. A weak Lewis acidity and high weak basicity of TiO2-CeO2 support and well-reducible PtOx species in Pt/TiO2-CeO2@VUKOPOR®A foam were responsible for its improved catalytic efficiency. Overall comparison with other reported commercial and laboratory-prepared catalysts revealed that in dichloromethane oxidation the developed Pt/TiO2-CeO2@VUKOPOR®A foam and TiO2-CeO2@VUKOPOR®A foam did not exceed the catalytic activity of alumina-based commercial monolithic and granulated catalysts, but showed satisfactory HCl selectivity (70% at T80). Lower catalytic activity of TiO2-CeO2-based catalytic foams can be attributed to insufficient acidity (missing medium and strong Brönsted acidity) of TiO2-CeO2 support. In methanol oxidation, Pt/TiO2 CeO2@VUKOPOR®A foam as well as TiO2-CeO2@VUKOPOR®A foam showed lower catalytic activity and CO2 selectivity than CuO-containing@VUKOPOR®A foams.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20700 - Environmental engineering

Projekt

<a href="/cs/project/8J25FR017" target="_blank" >8J25FR017: Výzkum nových udržitelných přístupů pro syntézu zeolitů a hybridních zeolit-uhlíkových struktur pro katalytické a sorpční aplikace</a><br>

Návaznosti

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

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Journal of Environmental Chemical Engineering

ISSN

2213-2929

e-ISSN

2213-3437

Svazek periodika

13

Číslo periodika v rámci svazku

May

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

15

Strana od-do

117011

Kód UT WoS článku

001506095400006

EID výsledku v databázi Scopus

2-s2.0-105008675746