Enhanced catalytic decomposition of formaldehyde in low temperature and dry environment over silicate-decorated titania supported sodium-stabilized platinum catalyst

[Display omitted] •Pt/SiOx-TiO2 efficiently decomposes HCHO in low temperature and dry environment.•SiOx-TiO2 is obtained by adding SiO2 in synthesis of titanate and ion-exchange.•Silicate and sodium-stabilized Pt are two structural factors for good performance. Development of the environment-tolera...

Full description

Saved in:
Bibliographic Details
Published in:Applied catalysis. B, Environmental Environmental, 2020-11, Vol.277, p.119216, Article 119216
Main Authors: Li, Licheng, Li, Long, Wang, Lei, Zhao, Xuejuan, Hua, Zelin, Chen, Yuanyuan, Li, Xiaobao, Gu, Xiaoli
Format: Article
Language:English
Subjects:
Catalysts
Decomposition
Decoration
Dry environment
Environment
Extreme environments
Formaldehyde
Low temperature
Nanoparticles
Nanotechnology
Nanowires
Platinum
Pollutants
Relative humidity
Silica
Silicate
Silicon dioxide
Sodium
Titanium dioxide
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:[Display omitted] •Pt/SiOx-TiO2 efficiently decomposes HCHO in low temperature and dry environment.•SiOx-TiO2 is obtained by adding SiO2 in synthesis of titanate and ion-exchange.•Silicate and sodium-stabilized Pt are two structural factors for good performance. Development of the environment-tolerant catalyst can contribute to pollutant treatment in extreme environment. In the present work, precursor of the silicate-decorated titania (SiOx-TiO2) was prepared by incorporating silica into hydrothermal synthesis of TiO2 nanowire (TNT). After loading Pt nanoparticles by impregnation, the as-prepared catalyst (Pt/SiOx-TiO2) possessed 7.2 times and 13.6 times the HCHO decomposition rate of Pt/TNT and conventional Pt/TiO2, respectively, at the temperature of 30 °C and the relative humidity of ∼5 %. Structure-performance relationship analyses showed that the excellent catalytic performance of Pt/SiOx-TiO2 was closely related to the presence of silicate and formation of sodium-stabilized Pt nanoparticles. The heterogeneously decorated silicate in Pt/SiOx-TiO2 had the excellent ability of capturing water from environment and even from HCHO decomposition itself. Consequently, the sodium-stabilized Pt nanoparticles of Pt/SiOx-TiO2 could be maintained in a wet microenvironment to exhibit the excellent HCHO decomposition performance in low temperature and dry environment.
ISSN:0926-3373
1873-3883
DOI:10.1016/j.apcatb.2020.119216