Fig. 2From: Lewis Basicity of Nitrogen-Doped Graphite Observed by CO2 Chemisorption a The area intensity of the mass 44 (CO2) peak as a function of the CO2 exposure. O 1s XPS spectra of b HOPG and c N-HOPG before and after CO2 adsorption. d A schematic of the Walsh diagram of CO2 orbital energies in linear and bent geometriesBack to article page