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Adsorption and Decomposition of a Lignin β-O-4 Linkage Model: Reactivity of Veratrole on Pt(111)
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DOI：10.1021/acs.jpcc.6c01331.png)
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Abstract
En 中文
The adsorption and decomposition of veratrole on a Pt(111) surface are studied as a model to understand the reactivity of the β-O-4 linkage in lignin. The results showed that under ultrahigh vacuum conditions, catechol, hydrogen, and carbon monoxide are the main desorbing products. A reaction mechanism is suggested, starting with the desorption of the multilayer around 215 K, followed by the decomposition of the monolayer through C–H and O–C bond cleavage on the methoxy groups. 1,2-Benzoquinone is proposed to exist as a key surface intermediate that keeps decomposing to form H2 and CO that desorb at 315 and 420 K, respectively, in competition with the formation and desorption of catechol. This observation, analogous to the reaction mechanisms for anisole and 2-phenoxyethanol, paves the way for generalizing reaction pathways for the breakdown of lignin.
Keywords:
Aromatic compounds
Desorption
Hydrocarbons
Organic reactions
Thermodynamic properties
Journal
T
IF:
3.2
Papers:
1.2K
Citations:
4
Organization
Cited Papers