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Highly Selective Bimetallic Pt-Cu/Mg(Al)O Catalysts for the Aqueous-Phase Reforming of Glycerol

Authors

  • Dilek A. Boga,

    1. Inorganic Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht (The Netherlands), Fax: (+31) 30-251-1027
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  • Ramon Oord,

    1. Inorganic Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht (The Netherlands), Fax: (+31) 30-251-1027
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  • Dr. Andrew M. Beale,

    1. Inorganic Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht (The Netherlands), Fax: (+31) 30-251-1027
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  • Dr. Young-Min Chung,

    1. SK innovation, 140-1 Wonchon-dong, Yuseong-gu, Daejeon 305-712 (South Korea)
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  • Dr. Pieter C. A. Bruijnincx,

    1. Inorganic Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht (The Netherlands), Fax: (+31) 30-251-1027
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  • Prof. Dr. Bert M. Weckhuysen

    Corresponding author
    1. Inorganic Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht (The Netherlands), Fax: (+31) 30-251-1027
    • Inorganic Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht (The Netherlands), Fax: (+31) 30-251-1027
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Abstract

Monometallic Pt and bimetallic Pt-Cu catalysts supported on Mg(Al)O mixed oxides, obtained by calcination of the corresponding layered double hydroxides (LDHs), were prepared and tested in the aqueous-phase reforming (APR) of glycerol. The effect of the Mg/Al ratio and calcination temperature of the LDH support, as well as the effect of varying Pt and Cu amounts on glycerol reforming, was investigated. The use of a basic support increases the selectivity to hydrogen and the use of a Pt-Cu bimetallic catalyst results in a decrease in alkane formation. The 0.9 wt. % Pt-0.4 wt. % Cu/Mg(Al)O_2.95 catalyst system with an Mg(Al)O mixed oxide support obtained by the calcination of the corresponding LDH material with Mg/Al ratio of 2.95 at 673 K, showed higher hydrogen selectivity (55.3 %) and lower methane production (1.9 %) after 5 h reaction than the benchmark Pt/Al2O3 catalyst (49.4 % and 5.6 %, respectively). Catalyst characterization by extended X-ray absorption fine structure (EXAFS) spectroscopy showed a bimetallic interaction between Pt and Cu. The bimetallic interaction is thought to be responsible for the lowered methane formation and, ultimately, the high hydrogen selectivity observed.

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