Pt/Co3O4/3DOM Al2O3: Highly effective catalysts for toluene combustion

doi:10.1016/S1872-2067(15)61095-6

Chinese Journal of Catalysis ›› 2016, Vol. 37 ›› Issue (6): 934-946.DOI: 10.1016/S1872-2067(15)61095-6

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Pt/Co₃O₄/3DOM Al₂O₃: Highly effective catalysts for toluene combustion

Huanggen Yang, Jiguang Deng, Yuxi Liu, Shaohua Xie, Peng Xu, Hongxing Dai

Beijing Key Laboratory for Green Catalysis and Separation, Key Laboratory of Beijing on Regional Air Pollution Control, and 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

Received:2016-01-29 Revised:2016-03-19 Online:2016-05-30 Published:2016-05-30
Contact: Jiguang Deng, Hongxing Dai
Supported by:
This work was supported by the National High Technology Research and Development Program of China (863 Program, 2015AA034603), the National Natural Science Foundation of China (21377008), and Foundation on the Creative Research Team Construction Promotion Project of Beijing Municipal Institutions.

Abstract

Abstract:

Three-dimensionally ordered macro-/mesoporous alumina (3DOM Al₂O₃)-supported cobalt oxide and platinum nanocatalysts (xPt/yCo₃O₄/3DOM Al₂O₃, Pt mass fraction (x%) = 0-1.4%, Co₃O₄ mass fraction (y%) = 0-9.2%) were prepared using poly(methyl methacrylate) templating, incipient wetness impregnation and polyvinyl alcohol-protected reduction. The resulting xPt/yCo₃O₄/3DOM Al₂O₃ samples displayed a high-quality 3DOM architecture with macropores (180-200 nm in diameter) and mesopores (4-6 nm in diameter) together with surface areas in the range of 94 to 102 m²/g. Using these techniques, Co₃O₄ nanoparticles (NPs, 18.3 nm) were loaded on the 3DOM Al₂O₃ surface, after which Pt NPs (2.3-2.5 nm) were uniformly dispersed on the yCo₃O₄/3DOM Al₂O₃. The 1.3Pt/8.9Co₃O₄/3DOM Al₂O₃ exhibited the best performance for toluene oxidation, with a T_90% value (the temperature required to achieve 90% toluene conversion) of 160 ℃ at a space velocity of 20000 mL g^-1 h^-1. It is concluded that the excellent catalytic performance of the 1.3Pt/8.9Co₃O₄/3DOM Al₂O₃ is owing to well-dispersed Pt NPs, the high concentration of adsorbed oxygen species, good low-temperature reducibility, and strong interaction between the Pt and Co₃O₄ NPs, as well as the unique bimodal porous structure of the support.

Key words: Three-dimensionally ordered macropore , Alumina-supported cobalt oxide catalyst, Supported platinum catalyst, Toluene combustion

Huanggen Yang, Jiguang Deng, Yuxi Liu, Shaohua Xie, Peng Xu, Hongxing Dai. Pt/Co₃O₄/3DOM Al₂O₃: Highly effective catalysts for toluene combustion[J]. Chinese Journal of Catalysis, 2016, 37(6): 934-946.

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Pt/Co₃O₄/3DOM Al₂O₃: Highly effective catalysts for toluene combustion

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