Citation: CAO Chong-Jiang, LIU Xiao-Geng, JU Xing-Rong, CHEN Xiao-Rong. Design, Synthesis and Characterization of Pt/Fe Bimetallic Fischer-Tropsch Catalyst[J]. Acta Physico-Chimica Sinica, ;2013, 29(11): 2475-2480. doi: 10.3866/PKU.WHXB201310101 shu

Design, Synthesis and Characterization of Pt/Fe Bimetallic Fischer-Tropsch Catalyst

1.
1 Department of Applied Catalysis, Nanjing University of Finance and Economics, Nanjing 210046, P. R. China;
2 Department of Chemical Engineering, University of Illinois, Chica , IL 60607, USA;
3 College of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing 210009, P. R. China

Received Date: 29 July 2013
Available Online: 10 October 2013
Fund Project: 国家科技部支撑计划(2011BAD03B02)资助 (2011BAD03B02)

An efficient method for preparing highly dispersed bimetallic catalysts is described based on the different Point Zero Charges of Fe₂O₃ and SiO₂. The strong electrostatic adsorption (SEA) technique was applied to the preparation of Pt-promoted Fe/SiO₂ by driving the Pt precursor onto the Fe₂O₃ phase instead of the silica support. Characterization of the samples was carried out using N₂ adsorptiondesorption, X-ray diffraction (XRD), scanning transmission electron microscopy (STEM), and energy dispersive X-ray spectroscopy (EDS). The results showed that the SEA method can control the uptake of Pt onto the transition metal oxide instead of silica, forming tight coupling between the Pt and transition metal after reduction. Compared with the incipient wetness (IW) method, the SEA technique produced more intimately designed bimetallic particles with small, uniform distribution after reduction. The particle size is about 2 nm. From Fischer-Tropsch (F-T) reaction, the catalyst using SEA shows higher F-T activity and stability. The conversion is more than 51% after 150 h on the stream.
- Strong electrostatic adsorption,
- Catalyst,
- Fischer-Tropsch synthesis,
- Iron oxide,
- Silica
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