Journal
CATALYSIS TODAY
Volume 302, Issue -, Pages 272-276Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cattod.2017.07.002
Keywords
Guaiacol; Lignin; TPD; HREELS; Bimetallic; HDO
Funding
- National Science Foundation [CBET-1508048]
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Temperature programmed desorption (TPD) and high resolution electron energy loss spectroscopy (HREELS) were used to characterize the adsorption and reaction of guaiacol on Pt(111) and Zn-modified Pt(111) surfaces. It was found that the guaiacol molecule binds to the Pt(111) surface via the aromatic ring which facilitates unselective decomposition to produce CO, H-2 and small hydrocarbon fragments at relatively low temperatures. In contrast, on Zn-modified Pt(111) surfaces, guaiacol was found to bond to surface Zn sites via the oxygen atoms in the molecule producing a bonding configuration in which the aromatic ring is tilted away from the surface. Such a binding configuration facilitates the desired C-O bond cleavage while keeping the aromatic nature of the molecule intact.
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