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Cu-Ni Nanocatalysts in Mesoporous MCM-41 and TiO2 to Produce Hydrogen for Fuel Cells via Steam Reforming Reactions

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Abstract:

We have synthesized mesoporous SiO2 (MCM-41) and TiO2 encapsulated bimetallic Cu-Ni nanocatalysts using an optimized one-pot hydrothermal procedure. The catalysts were characterized using BET, XRD, TGA-DSC and HRTEM techniques. While bimetallic Cu-Ni/MCM-41catalysts have high surface area- 634-1000 m2/g, Cu-Ni/TiO2 yields surface area of 250-350 m2/g depending on the metal loading (5-10 wt%). The XRD studies confirmed a long range ordered structure in Cu-Ni/MCM-41 and the presence of the catalytically active anatase phase in the crystalline Cu-Ni/TiO2. The results from HRTEM studies were consistent with the mesoporosity of both supports. These catalysts were tested for methanol conversion and H2/CO selectivity via steam reforming of methanol (SRM) reactions in a fixed bed reactor. There is a distinct difference in the performance of these two supports. Bimetallic 3.33%Cu6.67%Ni/TiO2 catalyst showed an impressive 99% H2 selectivity at as low as 150°C and a maximum conversion of 92% at 250 °C but 3.33%Cu6.67%Ni/MCM-41 catalyst did not show any H2 selectivity at 150°C and only ~12% conversion at 250°C. The effect of each support and relative metal loadings on the activity and selectivity of the SRM reaction products at different temperatures is discussed.

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Periodical:

Advanced Materials Research (Volume 1096)

Pages:

161-168

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1096.161

Citation:

Cite this paper

Online since:

April 2015

Authors:

Richard Yeboah Abrokwah, Vishwanath G. Deshmane, Sri Lanka Owen, Debasish Kuila*

Keywords:

Co Selectivity, Cu-Ni, H2 Selectivity, Mesoporous Silica, Methanol Conversion, One-Pot Hydrothermal Synthesis, Titaniabimetallic Catalysts

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Creative Commons CC BY 4.0

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* - Corresponding Author

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