Abstract
The catalytic production of fuels and chemicals from biomass requires a greater understanding of the chemistry of biomass derived sugars on advanced catalyst surfaces. This study examines the reaction of cellulosic derivative d-glucose and functional surrogates glycolaldehyde and glyceraldehyde on the bimetallic Ni/Pd(111) surface using temperature programmed desorption (TPD) in ultra high vacuum (UHV). It was found that the primary reaction pathway on the Ni/Pd system for all three molecules was dehydrogenation to produce CO and H2. Additionally, it was found that of the surfaces studied, the reforming activity followed the trend Pd(111)>Pd-Ni-Pd≈Ni-Pd-Pd>thick Ni/Pd. The Ni terminated surfaces were also found to produce ethylene at high temperatures and saw generally higher temperature and broader H2 desorption peaks, suggesting a higher energy barrier for CH bond scission.
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