Two-dimensional bimetallic Fe/M- (Ni, Zn, Co and Cu) metal organic framework as efficient and stable electrodes for overall water splitting and supercapacitor applications

In Situ Design of a Nanostructured Interface between NiMo and CuO Derived from Metal–Organic Framework for Enhanced Hydrogen Evolution in Alkaline Solutions

“…To compare the electroactive surface area with the specific surface area, the BET surface area and pore volume of the selected samples were measured from N 2 adsorption–desorption isotherms (Figure S15). Both pristine Cu-BDC and NiMo/Cu-BDC demonstrated typical type-I isotherms (Figure S15a,c) according to IUPAC classifications, indicating a microporous nature . In contrast, the heat-treated catalysts (Figure S15b,d) displayed a type IV isotherm with an H3-type hysteresis loop, suggesting that the pore structures are mainly mesopores .…”

“…As reported in previous studies, under alkaline conditions, the kinetics of the HER is elucidated by the adsorption/ desorption processes involving hydrogen atoms/molecular hydrogen, employing either Volmer−Heyrovsky (120−40 mV dec −1 ) or Volmer−Tafel (120−30 mV dec −1 ) mechanisms. 63,64 It is widely acknowledged that the HER kinetics is facile, unaffected by the defined overpotential of the catalyst. Thus, it can be confirmed that the HER kinetics demonstrate a remarkably uniform behavior across all documented catalysts.…”

“…The exchange current density is a parameter more commonly employed to assess the activity of the HER compared to its use in evaluating the OER. There is a direct correlation between the exchange current density and onset overpotential in the HER. , In other words, a catalyst is considered more active when its j 0 is higher. NiMo/Cu-BDC Cal.…”

Electrospinning construction of a Fe–Ni-based multicomponent hybrid as synergistic electrocatalyst for water electrolysis

“…4b) showed two major species at 712.2 eV (Fe-N in FeNi 3 N) and 714.3 eV (Fe-PO x in FeNi 2 P). 17 The corresponding Fe 2p 1/2 peaks appeared at 723.6 and 726.5. 18 In the deconvolution spectrum of P 2p (Fig.…”

“…[12][13][14][15] Therefore, non-precious metals, especially transition metal-based electrocatalysts have attracted more and more attention. [16][17][18][19] Transition metal-based phosphides, 20-27 suldes, [28][29][30][31] nitrides, [32][33][34][35] oxides, [36][37][38] and alloys [39][40][41][42][43] are all reported as effective electrocatalysts for HER, OER, and water splitting.…”