H 2 production by the photocatalytic reforming of cellulose and raw biomass using Ni, Pd, Pt and Au on titania

We report a method for sustainable hydrogen production using sunlight and biomass

A. Caravaca; W. Jones; C. Hardacre; M. Bowker


Scholarcy highlights

  • The number of publications searching for clean energy sources has dramatically increased in recent years owing to the importance of a move from fossil fuel resources to renewable feedstocks
  • Even though the studies about the photoreforming of cellulose assume that the first step in this process is the hydrolysis towards glucose, none of the publications shown in table 1 compare hydrogen evolution with both molecules over similar catalysts
  • In order to enhance our knowledge regarding previous studies about the photocatalytic reforming of cellulose over Pt/TiO2-based catalysts, we have studied the parameters that influence the rate of H2 production and the rate law for cellulose photoreforming
  • In view of the further practical development of this technology, we studied for the first time, to the best of our knowledge, hydrogen production by the photocatalytic reforming of fescue grass as a clean and abundant raw biomass
  • We have clearly demonstrated that hydrogen can be produced by photoreforming of cellulose/water mixtures over TiO2 catalysts loaded with metal nanoparticles
  • The reaction was studied over the TiO2 without metal loading, as well as over the 0.2% Pt/TiO2 in the absence of cellulose to check for any hydrogen production
  • To further illustrate the practicality of the process, fescue grass has been shown to be a suitable raw biomass sacrificial donor, producing a significant amount of H2 by photoreforming. This process shows high potential for efficient hydrogen economy, because it allows the production of hydrogen directly from the main component of biomass, avoiding any intermediate transformation steps over low loading metal/TiO2 catalysts

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