Citation: GAO Xiao-Ping, GUO Zhang-Long, ZHOU Ya-Nan, JING Fang-Li, CHU Wei. Catalytic Performance and Characterization of Anatase TiO₂ Supported Pd Catalysts for the Selective Hydrogenation of Acetylene[J]. Acta Physico-Chimica Sinica, ;2017, 33(3): 602-610. doi: 10.3866/PKU.WHXB201611251 shu

Catalytic Performance and Characterization of Anatase TiO₂ Supported Pd Catalysts for the Selective Hydrogenation of Acetylene

GAO Xiao-Ping ^1,2, ,
GUO Zhang-Long ^1,2 ,
ZHOU Ya-Nan ^1,2 ,
JING Fang-Li ¹ ,
CHU Wei ^1,2

1.
School of Chemical Engineering, Sichuan University, Chengdu 610065, P. R. China;
2.
Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610207, P. R. China

Received Date: 26 August 2016
Revised Date: 25 November 2016

Fund Project: The project was supported by the National Natural Science Foundation of China (21476145)

Anatase TiO₂ nanospindles containing 89% exposed {101} facets (TiO₂-101) and nanosheets with 77% exposed {001} facets (TiO₂-001) were hydrothermally synthesized and used as supports for Pd catalysts. The effects of the TiO₂ materials on the catalytic performance of Pd/TiO₂-101 and Pd/TiO₂-001 catalysts were investigated in the selective hydrogenation of acetylene to polymer-grade ethylene. The Pd/TiO₂-101 catalyst exhibited enhanced performance in terms of acetylene conversion and ethylene yield. To understand these effects, the catalysts were characterized by H₂ temperature-programmed desorption (H₂-TPD), H₂ temperatureprogrammed reduction (H₂-TPR), transmission electron microscopy (TEM), pulse CO chemisorption, X-ray photoelectron spectroscopy (XPS), and thermogravimetric analysis (TGA). The TEM and CO chemisorption results confirmed that Pd nanoparticles (NPs) on the TiO₂-101 support had a smaller average particle size (1.53 nm) and a higher dispersion (15.95%) than those on the TiO₂-001 support (average particle size of 4.36 nm and dispersion of 9.06%). The smaller particle size and higher dispersion of Pd on the Pd/TiO₂-101 catalyst provided more reaction active sites, which contributed to the improved catalytic activity of this supported catalyst.
- Pd/TiO₂ catalyst,
- Acetylene selective hydrogenation,
- Anatase TiO₂,
- {101}plane,
- Structure characterization
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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Catalytic Performance and Characterization of Anatase TiO2 Supported Pd Catalysts for the Selective Hydrogenation of Acetylene

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通讯作者: 陈斌, bchen63@163.com

Catalytic Performance and Characterization of Anatase TiO₂ Supported Pd Catalysts for the Selective Hydrogenation of Acetylene