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Hydrogen production by aqueous phase reforming of sorbitol using bimetallic Ni–Pt catalysts: metal support interaction

Tanksale, A. ; Zhou, C. H. ; Beltramini, J. N. ; Lu, G. Q.

Journal of Inclusion Phenomena and Macrocyclic Chemistry, 2009-10, Vol.65 (1-2), p.83-88 [Periódico revisado por pares]

Dordrecht: Springer Netherlands

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  • Título:
    Hydrogen production by aqueous phase reforming of sorbitol using bimetallic Ni–Pt catalysts: metal support interaction
  • Autor: Tanksale, A. ; Zhou, C. H. ; Beltramini, J. N. ; Lu, G. Q.
  • Assuntos: Chemistry ; Chemistry and Materials Science ; Crystallography and Scattering Methods ; Food Science ; Organic Chemistry ; Original Article
  • É parte de: Journal of Inclusion Phenomena and Macrocyclic Chemistry, 2009-10, Vol.65 (1-2), p.83-88
  • Notas: ObjectType-Article-2
    SourceType-Scholarly Journals-1
    ObjectType-Feature-1
    content type line 23
  • Descrição: Hydrogen was produced by Aqueous Phase Reforming (APR) of 10% (w/w) sorbitol using mono- and bi-metallic catalysts of Ni and Pt supported on alumina nano-fibre (Alnf), mesoporous ZrO 2 and mixed oxides of ceria–zirconia–silica (CZ x S) with varying concentration of silica (where x is silica concentration). X-ray diffraction, TEM/EDS and temperature programmed reduction were also carried on these catalysts to study the surface properties. It was observed that co-impregnation of Pt and Ni in atomic ratio 1:12 increased the reducibility of Ni by forming an alloy. However, sequential impregnation of Ni followed by Pt does not form the bi-metallic particles to increase the Ni reducibility. Reduction peak of co-impregnated Ni–Pt/Alnf was found to be 270 °C lower than the sequentially impregnated Pt/Ni/Alnf. The presence of silica at high concentration in CZ x S support decreased the reducibility of ceria by forming an amorphous layer on Ce x Zr 1−x O 2 crystals, which also decreased Ni reducibility. The rate of H 2 formation from aqueous phase sorbitol reforming was found to be highest for co-impregnated Ni–Pt catalysts followed by sequentially impregnated Pt/Ni and monometallic Ni catalyst. The H 2 activity decreased in the following order of the supports: Alnf > ZrO 2  > CZ3S > CZ7S.
  • Editor: Dordrecht: Springer Netherlands
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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