Mo-doped CoFeP/nitrogen doped carbon porous nanocubes for alkaline hydrogen production

Boron-doped CoP/nitrogen-doped carbon drives enhanced alkaline hydrogen evolution

“…Introducing carbon materials into metal-based nano-catalysts is also an effective strategy for improving electrocatalysis activity. 24 Prussian blue analogue (PBA) 25,26 is a sort of metal organic framework (MOF) material. Its chemical formula is M x II [M y III (CN) 6 ] z ·H 2 O, where M III and M II are metal trivalent and divalent cations, respectively, and its –CN ligands can be decomposed at high temperatures to form nitrogen-doped carbon (NC).…”

Highly N‐Doped Fe/Co Phosphide Superstructures for Efficient Water Splitting

“…This implies that the moderate Fe content in N‐FeCoP prevents the oxidation of P, leading to an improvement in material conductivity. [ 36 ]…”

“…As compared with previous reports, the N‐FeCoP is among the best alkaline HER catalysts (Table S2, Supporting Information). [ 6,9,16,36–41 ]…”

“…This implies that the moderate Fe content in N-FeCoP prevents the oxidation of P, leading to an improvement in material conductivity. [36] Prior to electrocatalytic measurements, the double-layer capacitance (C dl ) of N-CoP, N-FeCoP, and N-FeCoP' were measured to evaluate the electrochemical active surface areas (ECSA) using cyclic voltammetry (CV) curves at different scanning rates in a non-faradic potential range (Figure S6, Supporting Information). Capacitive currents obtained via CV were plotted as a function of scan rate, as shown in Figure 5a, the N-FeCoP sample possesses a C dl of 11.5 mF cm −2 , larger than those of N-FeCoP' (7.3 mF cm −2 ) and N-CoP (8.6 mF cm −2 ).…”

“…As compared with previous reports, the N-FeCoP is among the best alkaline HER catalysts (Table S2, Supporting Information). [6,9,16,[36][37][38][39][40][41] Tafel plots were then carried out to study the HER kinetics of the as-obtained catalysts. As presented in Figure 5c, the N-FeCoP displays a slope of ≈79.0 mV dec −1 , which is smaller than those of N-FeCoP' (≈104 mV dec −1 ) and N-CoP (≈112 mV dec −1 ), implying the faster kinetics on N-FeCoP and the HER occurring mainly via a Volmer-Heyrovsky mechanism that involves the following steps: H 2 O + e − →H ads + OH − (Volmer step) and H 2 O+H ads +e − →H 2 (g)+OH − (Heyrovsky step).…”