Metal-free doped carbon materials as electrocatalysts for the oxygen reduction reaction

Heteroatom–doped hollow carbon microspheres based on amphiphilic supramolecular vesicles and highly crosslinked polyphosphazene for high performance supercapacitor electrode materials

“…The peak centered at 400.3 eV (Fig. 5c) is assigned to pyrrolic N, which can enhance the pseudocapacitance of carbon material [38,39]. The high resolution S2p peaks of HCMSs are resolved into three different peaks at the binding energies of 164.2, 165.4 and 168.8 eV.…”

An Oxygen Reduction Study of Graphene-Based Nanomaterials of Different Origin

“…This is somewhat unexpected result since based on the Raman study, the rGO sample consisted more defects than other samples (see the I D /I G ratio in Section 2.1) indicating that presumably more edge sites for oxygen adsorption are exposed compared with the other graphene-based materials. However, based on the literature, it has been claimed, that an increase in the amount of edges does not necessarily lead to a higher ORR activity [70]. On the other hand, it has been claimed that not only the amount of oxygenated species, but also the type of carbon-oxygen functionalities present on the surface of graphene-based materials could be considered as an important factor in the ORR [43].…”

“…In addition, the onset potential (the potential value at ca. 0.1 mA•cm −2 ) [70] was determined as ca. −0.2 V for GC/Graphene1, GC/Graphene2, GC/rGO and GC/GO electrodes.…”

“…In addition, the onset potential (the potential value at ca. 0.1 mA¨cm´2) [70] was determined as ca.´0.2 V for GC/Graphene1, GC/Graphene2, GC/rGO and GC/GO electrodes. This value is higher than for example in case of bare GC (ca.´0.3 V [66]) indicating that the ORR process starts at a higher potential on all these materials than on bare GC, which is also consistent with the LSV results (see Figure 5).…”

Removal of azo dye by a highly graphitized and heteroatom doped carbon derived from fish waste: Adsorption equilibrium and kinetics

“…In addition, heteroatom-doped porous carbons recently have become a hot area because of their expanded electric property originating from heteroatom-containing functional groups within carbon matrix (Daems et al, 2014;Shen and Fan, 2013;Chen et al, 2014). In general, high cost and stringent preparation conditions pose significant challenges for wide-scale application of the heteroatomdoped porous carbons.…”