Fig. 4.
The electrocatalytic performance for HOR. a Steady-state polarization curves of Ni3N/Ni/NF, Ni/NF, and Pt/NF for HOR in H2-saturated 0.1 M KOH. b Chronoamperometry curves of Ni3N/Ni/NF in H2- or Ar-saturated 0.1 M KOH measured at 0.09 V vs. RHE. c Comparison of the HOR polarization curves of Ni3N/Ni/NF and Pt/NF in 0.1 M KOH saturated with H2 or H2 with 2% CO (v/v). d Chronoamperometry curves of Ni3N/Ni/NF and Pt/NF in 0.1 M KOH saturated with H2 with 2% CO (v/v) measured at 0.09 V vs. RHE. All results were collected without iR compensation. The current densities were calculated on the basis of the geometric electrode areas