Nitrogen-doped carbon nanotube encapsulated Fe₇S₈ nanoparticles for the high-efficiency and selective removal of Pb²⁺ by pseudocapacitive coupling

Abstract

Lead (Pb) is one of the most common public hazards in drinking water, which widely derives from mining, batteries, and dying manufacturing charging, and so on. To eliminate this critical...

Corrosive engineering assistedin situconstruction of an Fe–Ni-based compound for industrial overall water-splitting under large-current density in alkaline freshwater and seawater media

“…64,65 The other two peaks at 726.9 and 713.7 eV of Fe 2p 1/2 and Fe 2p 3/2 are assigned to Fe 3+ , 66,67 respectively, in which two peaks located at 719.1 eV and 733.9 eV are the satellite peaks of Fe. 68,69 As shown in Fig. 5e, two peaks of Ru 3p at binding energies of 486.6 and 464.3 eV correspond to Ru-O and Ru 0 , respectively, which indicates that the Ru 3+ is successfully reduced to Ru 0 by Ni nanoparticles at room temperature.…”

Prussian blue-derived multiple yolk–single shell-structured Se-doped Fe7S8@NC@C microcube composites as high-rate anodes for sodium-ion batteries

“…The satellite peak of Fe is present at 717.5 eV, and the two spin-orbital peaks at 727.0/724.0 eV and 713.0/710.6 eV belong to the redox pair of Fe 3+ /Fe 2+ , attributed to Fe 2p 1/2 and Fe 2p 3/2 , respectively. 43 In the S 2p spectra of Se-Fe 7 S 8 @NC@C and Fe 7 S 8 @NC@C, three types peaks of S 2p can be detected, corresponding to (S 2 ) 2− , (S n ) 2− and S–O, respectively 44 (Fig. 4c).…”

Binder‐Free LiMn2O4 Nanosheets on Carbon Cloth for Selective Lithium Extraction from Brine via Capacitive Deionization

“…The contribution ratios of the two parts can be calculated or divided by the formula I ( V ) = k 1 + k 2 V 1/2 according to previous work. [ 38,39 ] Figure 4f shows the different capacitive contribution ratios of 90%, 91%, 95%, 95%, and 96% between 0.1 and 1.0 mV s −1 . The high surface capacitance ratio could significantly improve the electrosorption performance of the LMOns@CC electrodes during the HCDI process.…”