XPS of nitrogen-containing functional groups on activated carbon

Polyaniline/porous carbon electrodes by chemical polymerisation: Effect of carbon surface chemistry

“…The peak at 398.7 can be attributed to the neutral imine nitrogen (-N=) [41][42][43][44][45][46][47]. The peak at 399.4±0.3 eV corresponds to neutral amine nitrogen (-NH-) [41][42][43]45]. These peaks are in agreement with the formation of polyaniline, thus corroborating the voltammetric results.…”

“…Thus, it is confirmed that aniline incorporation removes surface oxygen complexes by reaction with them. The peak at 398.7 can be attributed to the neutral imine nitrogen (-N=) [41][42][43][44][45][46][47]. The peak at 399.4±0.3 eV corresponds to neutral amine nitrogen (-NH-) [41][42][43]45].…”

“…These peaks are in agreement with the formation of polyaniline, thus corroborating the voltammetric results. The peak at 400.5±0.3 eV is usually assigned to pyrrolic nitrogen [41][42][43][44][45] and could be associated to the reaction products of aniline and surface oxygen groups on the carbon surface [41]. …”

Development of low-cost biomass-based adsorbents for postcombustion CO2 capture

“…A first series of samples were prepared by activation of the char with 10 cm 3 min -1 of carbon dioxide at different burn-off degrees (20,40 and 50 %). The temperature of activation was set at 800 ºC, based on previous tests in a thermogravimetric analyser.…”

“…Amination significantly increases the amount of nitrogen incorporated into the carbon matrix. This nitrogen fixation comes from the reaction of ammonia with carbon surface oxides to form ammonium salts and amine groups that, upon dehydration and dehydrogenation produce amides, nitriles and pyridine or pyrrole-like functionalities [16,40].…”