Hydrogen Photo-Production from Glycerol Using Nickel-Doped TiO2 Catalysts: Effect of Catalyst Pre-Treatment

Energies

Jesús Hidalgo-Carrillo¹  Alberto Marinas¹  FranciscoJosé Urbano¹  Julia Morales¹  Juan Martín-Gómez¹  JuanCarlos Espejo¹ 

[1] Departamento de Química Orgánica, Instituto Universitario de Investigación en Química Finay Nanoquímica (IUNAN), Universidad de Córdoba, E-14071 Córdoba, Spain;

关键词: hydrogen production;    photo-reforming;    glycerol;    Ni/TiO₂;   

DOI  :  10.3390/en12173351

来源: DOAJ

【 摘 要 】

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 H₂·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.

【 授权许可】

Unknown