Highly durable carbon supported FeN nanocrystals feature as efficient bi‐functional oxygen electrocatalyst

An Ultrastable Bifunctional Electrocatalyst Derived from a Co2+-Anchored Covalent–Organic Framework for High-Efficiency ORR/OER and Rechargeable Zinc–Air Battery

“…Due to the presence of N element in the TRIPTA precursor, further confirmation of the absence of Co–N x species is necessary to verify the sole contribution of Co 3 O 4 /CoO nanoparticles to the ORR performance of CoO x @NC-800. Hexamethylenetetramine (HMTA) that can bond strongly to Co 2+ in aqueous solution is chosen to carry out the poison test. , The LSV curves are recorded as the concentration of HMTA gradually increases from 10 to 30 mM in 0.1 M KOH electrolyte. As displayed in Figure h, the LSV curves remain the same as that free of HMTA, overlapping each other, which indicates that N-coordinated Co sites do not exist in the carbon structure.…”

Biomass carbon dual‐doped with iron and nitrogen for high‐performance electrocatalyst in water splitting

“…Figure 3A displays the C1s peaks of CA@Fe(1:3)-800, among them 284.6 eV represents graphitic carbon, 286.3 eV and 289.9 eV are corresponding to C N/C O and C O, respectively. 28 From N1s spectrum of CA@Fe (1:3)-800 in Figure 3B, the peaks of 398.0, 400.2, and 402.6 eV are attributed to pyridine-N, pyrrole-N, and graphite-N, as well as CA@Fe(1:4)-800 and CA@Fe(1:5)-800 in Figure 3C. However, CA@Fe(1:3)-600 and CA@Fe (1:3)-700 almost have no pyridine-N ingredient in themselves.…”

“…From the TGA curve in Figure 2D, CA@Fe(1:3)‐800 still remains the mass of 71.3% at 800°C, suggesting its good thermal stability. Figure 3A displays the C1s peaks of CA@Fe(1:3)‐800, among them 284.6 eV represents graphitic carbon, 286.3 eV and 289.9 eV are corresponding to CN/CO and CO, respectively 28 . From N1s spectrum of CA@Fe(1:3)‐800 in Figure 3B, the peaks of 398.0, 400.2, and 402.6 eV are attributed to pyridine‐N, pyrrole‐N, and graphite‐N, as well as CA@Fe(1:4)‐800 and CA@Fe(1:5)‐800 in Figure 3C.…”

Co‐N‐doped hierarchically ordered macro/mesoporous carbon as bifunctional electrocatalyst toward oxygen reduction/evolution reactions

“…39,40 The high-resolution N 1s spectrum of N-OMC, Co-N-OMC, and Co-N-3DOM/mC ( Figure 5B) could be fitted by four peaks corresponding to graphitic-N, pyrrolic-N, pyridinic-N, and pyridinic-N-oxide. [41][42][43] The high content of graphitic-N and pyridinic-N of Co-N-OMC and Co-N-3DOM/mC enhanced the catalytic performance. The XPS results showed the Co contents of Co-N-OMC and Co-N-3DM/ mC were 0.82% and 0.65%, respectively.…”