Fig. 6: Experimental evidence for the methoxycarbonyl species formation.
From: Ambient-pressure alkoxycarbonylation for sustainable synthesis of ester

In situ FTIR surface reactions of CO, styrene and methanol over Ru/NbOx: a temperature-resolved reaction after chemisorption of CO and methanol/styrene vapor. b time-resolved process at 150 °C. c adsorption of styrene vapor after CO desorption at 150 °C. d adsorption of methanol vapor after CO desorption at 150 °C.