Hydrogen Photo-Production from Glycerol Using Nickel-Doped TiO 2 Catalysts: Effect of Catalyst Pre-Treatment

Jesús Hidalgo-Carrillo, Juan Martín-Gómez, Julia Morales, Juan Carlos Espejo, Francisco José Urbano and Alberto Marinas
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Jesús Hidalgo-Carrillo: Departamento de Química Orgánica, Instituto Universitario de Investigación en Química Finay Nanoquímica (IUNAN), Universidad de Córdoba, E-14071 Córdoba, Spain
Juan Martín-Gómez: Departamento de Química Orgánica, Instituto Universitario de Investigación en Química Finay Nanoquímica (IUNAN), Universidad de Córdoba, E-14071 Córdoba, Spain
Julia Morales: Departamento de Química Orgánica, Instituto Universitario de Investigación en Química Finay Nanoquímica (IUNAN), Universidad de Córdoba, E-14071 Córdoba, Spain
Juan Carlos Espejo: Departamento de Química Orgánica, Instituto Universitario de Investigación en Química Finay Nanoquímica (IUNAN), Universidad de Córdoba, E-14071 Córdoba, Spain
Francisco José Urbano: Departamento de Química Orgánica, Instituto Universitario de Investigación en Química Finay Nanoquímica (IUNAN), Universidad de Córdoba, E-14071 Córdoba, Spain
Alberto Marinas: Departamento de Química Orgánica, Instituto Universitario de Investigación en Química Finay Nanoquímica (IUNAN), Universidad de Córdoba, E-14071 Córdoba, Spain

Energies, 2019, vol. 12, issue 17, 1-14

Abstract: In the present piece of research, hydrogen production via the photo-reforming of glycerol (a byproduct from biodiesel generation) is studied. Catalysts consisted of titania modified by Ni (0.5% by weight) obtained through deposition–precipitation or impregnation synthetic methods (labelled as Ni-0.5-DP and Ni-0.5-IMP, respectively). Reactions were performed both under UV and solar irradiation. Activity significantly improved in the presence of Ni, especially under solar irradiation. Moreover, pre-reduced solids exhibited higher catalytic activities than untreated solids, despite the “in-situ” reduction of nickel species and the elimination of surface chlorides under reaction conditions (as evidenced by XPS). It is possible that the catalyst pretreatment at 400 °C under hydrogen resulted in some strong metal–support interactions. In summary, the highest hydrogen production value (ca. 2600 micromole H 2 ·g −1 ) was achieved with pre-reduced Ni-0.5-DP solid using UV light for an irradiation time of 6 h. This value represents a 15.7-fold increase as compared to Evonik P25.

Keywords: hydrogen production; photo-reforming; glycerol; Ni/TiO 2 (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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