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Open AccessArticle

Mild Preoxidation Treatment of Pt/TiO2 Catalyst and Its Enhanced Low Temperature Formaldehyde Decomposition

1
Innovation Research Center of Lignocellulosic Functional Materials, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China
2
Eastman Shuangwei Fibers Company Limited, Hefei 230601, China
3
Research Institute of Wison Advanced, Wison (China) Holding Company, Shanghai 201210, China
4
School of Materials Science and Engineering, Nanjing Institute of Technology, Nanjing 211167, China
5
State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 210009, China
*
Authors to whom correspondence should be addressed.
Catalysts 2019, 9(8), 694; https://doi.org/10.3390/catal9080694
Received: 10 July 2019 / Revised: 2 August 2019 / Accepted: 9 August 2019 / Published: 16 August 2019
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Abstract

The typical platinum nanoparticles loaded on titania (Pt/TiO2) were pretreated with mild oxidation (<300 °C) in pure oxygen to enhance the low-temperature formaldehyde (HCHO) decomposition performance. The structural properties of support and platinum nanoparticles were characterized by X-ray diffraction (XRD), physical adsorption/desorption, high-resolution transmission electron microscopy (HRTEM), in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFITS), and temperature-programmed reduction and oxidation (TPR and TPO). The catalytic results showed that the low temperature HCHO decomposition activity of mild pre-oxidized Pt/TiO2 was around three times that of the pristine one. According to the characterization results, the structure of the Pt/TiO2 support and their Pt particle sizes had negligible change after pre-oxidation treatment. The cationic Pt content of Pt/TiO2 and surface roughness of Pt nanoparticles gradually increased with the increasing temperature of the pre-oxidation treatment. Mild pre-oxidation treatment was beneficial to the oxygen activation and water dissociation of Pt/TiO2. In situ HCHO-DFIRTS results showed that the mild pre-oxidation treatment could enhance the dehydrogenation of formate. View Full-Text
Keywords: formaldehyde; platinum; mild peroxidation; TiO2; catalytic decomposition formaldehyde; platinum; mild peroxidation; TiO2; catalytic decomposition
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Shi, K.; Wang, L.; Li, L.; Zhao, X.; Chen, Y.; Hua, Z.; Li, X.; Gu, X.; Li, L. Mild Preoxidation Treatment of Pt/TiO2 Catalyst and Its Enhanced Low Temperature Formaldehyde Decomposition. Catalysts 2019, 9, 694.

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