Chemisorption of CO on N-doped graphene on Ni(111)
Source abstract
Abstract
The chemical reactivity of single layers of supported graphene (G) is affected by the nature of the underlying substrate: in particular CO chemisorption occurs on G/Ni(111), while graphene on Cu is inert. Here, we demonstrate experimentally that doping of the G layer with nitrogen atoms further increases the reactivity of the G/Ni(111) system towards CO. The doped layer is obtained by sputtering pristine G/Ni(111) with N2 + ions. For an ~11% dopant concentration, an additional electron energy loss at 238 meV appears in the HREEL spectra besides the loss around 256 meV present also on pristine G/Ni(111). The new feature corresponds to a CO species with a higher desorption temperature and, consequently, a higher adsorption energy than the one forming on pristine G/Ni(111). At low coverage, the adsorption energy is estimated to be ~0.85 eV/molecule.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Graphene research and applications · Advancements in Battery Materials · Catalytic Processes in Materials Science
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References (42)
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