Mesoporous cobalt monoxide-supported platinum nanoparticles: Superior catalysts for the oxidative removal of benzene

Jun Yang; Yutong Xue; Yuxi Liu; Jiguang Deng; Xiyun Jiang; Huan Chen; Hongxing Dai

doi:10.1016/j.jes.2019.11.005

Mesoporous cobalt monoxide-supported platinum nanoparticles: Superior catalysts for the oxidative removal of benzene

J Environ Sci (China). 2020 Apr:90:170-179. doi: 10.1016/j.jes.2019.11.005. Epub 2019 Dec 9.

Authors

Jun Yang¹, Yutong Xue², Yuxi Liu¹, Jiguang Deng¹, Xiyun Jiang¹, Huan Chen², Hongxing Dai³

Affiliations

¹ Beijing Key Laboratory for Green Catalysis and Separation, Key Laboratory of Beijing on Regional Air Pollution Control, Key Laboratory of Advanced Functional Materials, Education Ministry of China, Laboratory of Catalysis Chemistry and Nanoscience, Department of Chemistry and Chemical Engineering, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, 100124, China.
² Beijing Guangqumen Middle School, Beijing, 100062, China.
³ Beijing Key Laboratory for Green Catalysis and Separation, Key Laboratory of Beijing on Regional Air Pollution Control, Key Laboratory of Advanced Functional Materials, Education Ministry of China, Laboratory of Catalysis Chemistry and Nanoscience, Department of Chemistry and Chemical Engineering, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, 100124, China. Electronic address: hxdai@bjut.edu.cn.

PMID: 32081313
DOI: 10.1016/j.jes.2019.11.005

Abstract

Mesoporous Co₃O₄ (meso-Co₃O₄)-supported Pt (0.53 wt.% Pt/meso-Co₃O₄) was synthesized via the KIT-6-templating and polyvinyl alcohol (PVA)-assisted reduction routes. Mesoporous CoO (meso-CoO) was fabricated through in situ reduction of meso-Co₃O₄ with glycerol, and the 0.18-0.69 wt.% Pt/meso-CoO samples were generated by the PVA-assisted reduction method. Meso-Co₃O₄ and meso-CoO were of cubic crystal structure and the Pt nanoparticles (NPs) with a uniform size of ca. 2 nm were well distributed on the meso-Co₃O₄ or meso-CoO surface. The 0.56 wt% Pt/meso-CoO (0.56Pt/meso-CoO) sample performed the best in benzene combustion (T_50% = 156 °C and T_90% = 186 °C at a space velocity of 80,000 mL/(g h)). Introducing water vapor or CO₂ with a certain concentration led to partial deactivation of 0.56 Pt/meso-CoO and such a deactivation was reversible. We think that the superior catalytic activity of 0.56 Pt/meso-CoO was intimately related to its good oxygen activation and benzene adsorption ability.

Keywords: Benzene adsorption; Benzene combustion; Mesoporous cobalt oxide; Oxygen activation; Supported Pt catalyst.

MeSH terms

Benzene / chemistry*
Cobalt*
Metal Nanoparticles*
Models, Chemical*
Oxidative Stress
Platinum*

Substances

Cobalt
Platinum
Benzene