Molten salt induced formation of chitosan based carbon nanosheets decorated with CoNx for boosting rechargeable Zn-air batteries

Co Single-Atom Nanozymes for the Simultaneous Electrochemical Detection of Uric Acid and Dopamine in Biofluids

“…The O1 spectra were deconvoluted into adsorbed O, Co–O, and C–O corresponding to 533.1, 532.7, and 531.3 eV, respectively (Figure c). The N 1s spectrum (Figure d) was analyzed for N species, including graphitic N (402.2 eV), Co–N x (401.1 eV), pyrrolic N (399.9 eV), and pyridinic N (398.9 eV) . Of note, pyridinic N and Co–N x with two P electrons contribute to the electrocatalytic process. , Co 2p spectra (Figure d) confirm the presence of Co present in Co-NNC with three satellite peaks at 780.9, 778.4, and 775.9 eV for Co 2p 3/2 , which can be attributed to Co–N, Co–O, and metallic Co …”

“…The N 1s spectrum (Figure 2d) was analyzed for N species, including graphitic N (402.2 eV), Co−N x (401.1 eV), pyrrolic N (399.9 eV), and pyridinic N (398.9 eV). 31 Of note, pyridinic N and Co−N x with two P electrons contribute to the electrocatalytic process. 32,33 Co 2p spectra (Figure 2d) confirm the presence of Co present in Co-NNC with three satellite peaks at 780.9, 778.4, and 775.9 eV for Co 2p 3/2 , which can be attributed to Co−N, Co−O, and metallic Co. 26 The crystal structure of Co-NNC was also investigated using X-ray diffraction (XRD) (Figure S1).…”

Integration of Fe2N Nanoparticles and FeCo Alloys into N-Doped Carbon Nanotubes as Efficient Oxygen Catalysts for Rechargeable Zn–air Batteries

“…(a) ORR polarization curves; (b) linear sweep voltammetry (LSV) curves of CoFe/Fe 2 N@N-CNTs at different electrode rotating speeds (400–2500 rpm) and the corresponding fitted K – L plots at different potentials (inset); (c) ORR stability test of CoFe/Fe 2 N@N-CNTs before and after 3000 cycles; (d) OER LSV curves and (e) the corresponding Tafel slopes; (f) methanol tolerance test by current–time curves for CoFe/Fe 2 N@N-CNTs and Pt/C + RuO 2 in O 2 -saturated 0.1 M KOH; (g) C dl values of corresponding samples; (h) the chronopotentiometry responses of CoFe/Fe 2 N@N-CNTs at the current density of 10 mA cm –2 ; (i) comparison of Δ E values of CoFe/Fe 2 N@N-CNTs, Pt/C + RuO 2 , and previous excellent catalysts in an alkaline electrolyte (0.1 M/1 M KOH). − …”