Fe doped amorphous single layered vanadyl phosphate nanosheets as highly efficient electrocatalyst for water oxidation

Electrochemically induced catalytic adsorption sites in spent lithium-ion battery cathodes for high-rate vanadium redox flow batteries

“…3d–f illustrate the O 1s core level representing the four states of oxygen, denoted as O 1 , O 2 , O 3 , and O 4 . The O 1 peak (529–530.7 eV) is assigned to lattice oxygen, 46–49 the O 2 peak (531–531.8 eV) corresponds to oxygen defect sites with low oxygen coordination, 46,50–53 the O 3 peak (532–533 eV) is associated with water or oxygen adsorbed on the surface, 49,54,55 and the O 4 peak (533–534 eV) means electrolyte oxidation. 56,57 Oxygen vacancies were estimated from the ratio of the relative area (O 2 /O 1 ), 46,53,55,58 and this ratio is plotted in Fig.…”

Facile Preparation of a Porous Nanosheet PX‐Doped Fe Bi‐Functional Catalyst with Excellent OER and HER Electrocatalytic Activity

“…Figure 2f shows that the characteristic peaks at 710.5 eV and 713.3 eV correspond to the Fe 2p 3/2 spin‐orbit, while the characteristic peaks at 724.1 eV and 726.9 eV correspond to the Fe 2p 1/2 spin‐orbit. Among them, the peak at 724.1 V is indicative of P−Fe chemical bonds, and the peaks at 713.3 eV and 726.9 eV arise from Fe−O−P chemical bonds, indicating that P 30 ‐doped Fe on nickel foam is readily oxidized in air to form metallic phosphate and that Fe in the deposit exists as Fe 2+ or Fe 3+ [35–37] . Therefore, the above date confirmed that P was successfully doped into Fe/NF via one‐step electrodeposition.…”

Manipulation on Two-Dimensional Amorphous Nanomaterials for Enhanced Electrochemical Energy Storage and Conversion

“…Commonly adopted strategies are direct coupling and post-doping. Wei et al fabricated Fe-doped amorphous VOPO 4 in solvothermal environment by one-pot two-phase colloidal method (Figure 2c) [38]. The oil phase consisted of oleylamine (OM) and octadecene (ODE) dis-solved with Fe and V precursor, which is mixed with water phase containing sodium dihydrogen phosphate, and then was sealed in an autoclave and heated to get the final product.…”

“…In HER field, highly active amorphous CoMoS4 nanosheets were constructed by coupling Mo to cobalt-based nanosheets, which showed favorable free energy change for H* adsorption and remarkable activity [65]. Some other metals can be benign dopants, such as Fe [38,39], Mo [66], Ag [62], etc. [67].…”