Fig. 3: The evaluation of HER performance of AlP-MoO2@Mo2C catalyst in 1.0 M KOH electrolyte (pH = 14 ± 0.1, Rs = 3.4 ± 0.3, mass loading = 2.83 mg/cm2, room temperature = 298 K).
From: Termination-acidity tailoring of molybdenum carbides for alkaline hydrogen evolution reaction
a Polarization (LSV without iR correction) curves of C (gray), MoO2@Mo2C (blue), AlP-MoO2@Mo2C (red) and commercial Pt/C (black) catalysts. b Six scans of the polarization (LSV) curves illustrating the full activation process for AlP-MoO2@Mo2C catalyst. c Tafel plots of MoO2@Mo2C (blue), AlP-MoO2@Mo2C (red) and commercial Pt/C (black) catalysts. d Determination of CdI values of MoO2@Mo2C and Al-MoO2@Mo2C catalysts by plotting the current-density variation (Δj) against the scan rates (10–100 mV/s). e Potential-dependent Nyquist plots of AlP-MoO2@Mo2C catalyst, with the inset showing the equivalent circuit for the simulation. f Chronopotentiometry measurement of AlP-MoO2@Mo2C and MoO2@Mo2C catalysts with the SEM image of used AlP-MoO2@Mo2C sample in the insert. g STEM-EDS mappings of used AlP-MoO2@Mo2C showing the homogeneous distributions of C (yellow), O (red), Mo (blue) and Al (orange) elements.
