Carbon-Supported Fe Catalysts for CO2 Electroreduction to High-Added Value Products: A DEMS Study: Effect of the Functionalization of the Support

Table 2

Quantification of surface oxygen groups as CO and CO₂ amounts desorbed during the TPD experiments.

Sample	CO2 and CO peak area (μmolg^−1)					CO + CO2 (μmolg^−1)	CO/CO2
	Carboxylic	Lactone	Anhydride	Phenol	Quinone + carbonyl
Vulcan	—	—	—	—	—	—	—
Vulcan NSTa0.5	545	256	65	412	881	2160	1.54
Vulcan NcTb0.5	556	243	58	480	699	2037	1.42
Vulcan NcTb2	799	362	63	632	963	2819	1.34