The strain induced synergistic catalysis of FeN4 and MnN3 dual-site catalysts for oxygen reduction in proton- /anion- exchange membrane fuel cells

High‐Rate Organic Cathode Constructed by Iron‐Hexaazatrinaphthalene Tricarboxylic Acid Coordination Polymer for Li‐Ion Batteries

“…[ 48 ] All the bonding orbitals are below the Fermi level, indicating their strong and stable coordination bonds between Fe ions and HATNTA. [ 49 , 50 ]…”

“…[48] All the bonding orbitals are below the Fermi level, indicating their strong and stable coordination bonds between Fe ions and HATNTA. [49,50] Subsequently, the electronic structure of Fe-HATNTA is calculated in detail to obtained its PDOS and TDOS (Total Density of States) diagram (Figure 5b). Interestingly, there is an obvious density of electronic states peak on the Fermi level, which mainly contributed by Fe element, leading to a much narrower LUMO-HOMO gap (the band gap of 1.9eV in HATNTA almost disappears) due to the coordination between Fe and O.…”

Cross-Linked Double-Active Centers for Efficient pH-Universal Oxygen Reduction Catalysis

“…35,36 Additionally, in Figure S2, the XRD of unsintered FeMn-ZIF-8, Fe-ZIF-8, and Mn-ZIF-8 matched the pattern of ZIF-8 well, implying that they have similar zeolite structure and high crystallinity. 29,37 Subsequently, the morphology of FeMn/NC is characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). As shown in Figure 2B,C, after Furthermore, Fe/NC, Mn/NC, and NC also have the same rhombic dodecahedron structure as FeMn/NC (Figure S3).…”

“…Moreover, in Figures 2F, S4, and S5, N 2 adsorption− desorption tests at 573 K demonstrated that FeMn/NC have the highest surface area of 1433.4 m 2 g −1 and can provide more reaction sites for ORR. 29,43 X-ray photoelectron spectroscopy (XPS) is carried out to investigate the molecular structures and valence states of FeMn/NC and comparison samples. C 1s and N 1s signals are observed in the XPS spectra of all materials.…”

Ruthenium nanoparticles supported on Ni3N nanosheets as bifunctional electrocatalysts for hydrogen oxidation/evolution reactions

“…[2][3][4][5][6] Since the highly stable hydroxide exchange membrane was reported, 7 anionexchange membrane fuel cells (AEMFCs) have attracted much attention because they provide the possibility to use low-cost non-noble metal catalysts for alkaline ORR. Unfortunately, HOR (hydrogen oxidation reaction) catalysts are still the bottleneck that hinders the applications of AEMFCs, [8][9][10][11] because the HOR at the anode in an alkaline environment is two orders of magnitude slower than that in acid, and Pt-based materials are still needed as the catalysts. Therefore, the design of lowcost Pt-free catalysts for the alkaline HOR is important and urgently required.…”