High content of pyridinic- and pyrrolic-nitrogen-modified carbon nanotubes derived from blood biomass for the electrocatalysis of oxygen reduction reaction in alkaline medium

Coprinus comatus-derived nitrogen-containing biocarbon electrocatalyst with the addition of self-generating graphene-like support for superior oxygen reduction reaction

“…Notably, the N-BC@G-1000 catalyst exhibits nearly the same limited current density with N-BC@G-900, but a lower E ORR for ORR. In fact, this phenomenon is in good accordance with the previously reported results, which correspond to the effect of the heat-treatment temperature on the electrocatalytic activity of nitrogen-doped graphene [35] and nitrogendoped CNT [36]. It is generally believed that the nitrogen content and N species proportion in the carbon materials play a key role for the improved ORR activity [35].…”

“…3.5 for N-BC@G-900 and the average j k was 8.8 mA/cm 2 for N-BC@G-900, based on the slopes and intercepts of K-L plots obtained at 0.5-0.7 V versus RHE. The results show that the ORR on N-BC@G-900 has mainly proceeded with four-electron reduction process, similar to the ORR electro-catalyzed by a 20 wt% Pt/C-ETK catalyst measured in 0.1 mol/L KOH electrolyte [36]. It is reasonably concluded that the N-BC@G-900 catalyst should be a very promising candidate for Ptbased electrocatalysts for the ORR in alkaline electrolytes.…”

“…Besides, the E ORR (the potential at which a current density of -100 lA/cm 2 ) obtained at N-BC@G-900 is about 0.97 V and slightly lower than Pt/ C-ETK (1.05 V). For further study, we compared the ORR catalytic property of N-BC@G-900 with other catalysts [13,14,17,21,35,36,38], as displayed in Table S1 (online). Our results are comparable with those of the best N-doped carbon catalysts reported to date in terms of E ORR , half-wave potential, average electron transfer number (n) and limited current density, but the BET surface area of the N-BC@G-900 catalyst is much lower than that of numerous nitrogen-doped carbon catalysts [16,33,34].…”

Synthesis of a Novel Petal‐Shaped Biomass‐Derived Carbon Material with Controlled Pore Structure and Nitrogen Content for Use in Supercapacitors

“…According to the SEM, BET, XRD, Raman, XPS, and FT‐IR analysis results, we can find that the modification of activated carbon materials by doping N can adjust the pore structure and provide additional structural defects and adsorption sites . In addition, the introduced N, especially N‐5 and N‐6, can also generate the additional pseudocapacitance …”

“…[43] In addition, the introduced N, especially N-5 and N-6, can also generate the additional pseudocapacitance. [44,45]…”