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Cerium Doped Pt/TiO2 for Catalytic Oxidation of Low Concentration Formaldehyde at Room Temperature

Authors
  • Shi, Yuanyuan1
  • Qiao, Zhiwei1
  • Liu, Zili1
  • Zuo, Jianliang1
  • 1 Guangzhou University, School of Chemistry and Chemical Engineering, Guangzhou, Guangdong, China , Guangzhou (China)
Type
Published Article
Journal
Catalysis Letters
Publisher
Springer US
Publication Date
Feb 20, 2019
Volume
149
Issue
5
Pages
1319–1325
Identifiers
DOI: 10.1007/s10562-019-02684-z
Source
Springer Nature
Keywords
License
Yellow

Abstract

AbstractFormaldehyde is a carcinogenic and teratogenic toxic gas. With the extensive use of a variety of building materials, indoor formaldehyde has seriously threatened human health and environment. The catalytic oxidation is considered the most promising method for the removal of formaldehyde from air. In this work, we report a Pt/TiO2 catalyst with Ce modification, and investigate its activity of catalytic oxidation of low concentration formaldehyde at room temperature. The experimental results show that the trace formaldehyde (20 mg/m3) could be completely degraded at 55 min by using Pt–Ce/TiO2 catalyst. In view of multiple characterizations, such as BET, XRD, TEM, STEM, XPS and CO adsorption, it is indicated that the modification of Ce can effectively improve the dispersion of Pt particles in the surface and reduction of Pt particle size from 2.9 to 2.2 nm. Moreover, XPS results show that the Ce in the catalyst could enhance the binding energies of Pt, provide abundant oxygen vacancies, and could increase the ratio of adsorbed oxygen atoms to lattice oxygen atoms, which is conducive to the adsorption of oxygen, leading to the improvement of catalytic activity.Graphical Abstract

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