Different routes to methanol: inelastic neutron scattering spectroscopy of adsorbates on supported copper catalysts
Literature Information
Timur Kandemir, Matthias Friedrich, Stewart F. Parker, Felix Studt, David Lennon, Robert Schlögl, Malte Behrens
We have investigated methanol synthesis with model supported copper catalysts, Cu/ZnO and Cu/MgO, using CO/H2 and CO2/H2 as feedstocks. Under CO/H2 both catalysts show chemisorbed methoxy as a stable intermediate, the Cu/MgO catalyst also shows hydroxyls on the support. Under CO2/H2 the catalysts behave differently, in that formate is also seen on the catalyst. For the Cu/ZnO catalyst hydroxyls are present on the metal whereas for the Cu/MgO hydroxyls are found on the support. These results are consistent with a recently published model for methanol synthesis and highlight the key role of ZnO in the process.
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