Fig. 2: Electrocatalytic performance of the catalysts.
From: Sustainable and cost-efficient hydrogen production using platinum clusters at minimal loading
a The iR-corrected polarization curves of glass carbon (GC), Mo2TiC2 (R = 3.378 Ω), Mo2TiC2-PtSA (R = 2.18 Ω), Mo2TiC2-PtNC (R = 1.763 Ω) and Pt/C-20% (R = 1.433 Ω) acquired using a graphite rod as the counter electrode in 0.5 M H2SO4 (GCE electrode surface area: 1.13 cm2, catalyst loading: 1 mg cm−2, rotation rate: 1600 rpm, pH value of the electrolyte (H2SO4): 0.43 ± 0.02, and all measurements were conducted at ambient temperature. All error bars in Fig. 2 represent the standard deviation. All potentials are 100% iR compensated, and all non-iR corrected data and corresponding resistance values for three independent samples are shown in Supplementary Fig. 14 and Supplementary Table 4, respectively). b H-UPD region of Mo2TiC2-PtNC and Pt/C-20% obtained from the cyclic voltammetry curve (Scan rate: 50 mV s−1). c ECSA-normalized (H-UPD) HER polarization curves of Mo2TiC2-PtNC and Pt/C-20% in 0.5 M H2SO4. d Tafel slopes of Mo2TiC2, Mo2TiC2-PtSA Mo2TiC2-PtNC and Pt/C-20%. e Operando EIS tests of Mo2TiC2-PtNC. f Calculated TOF and mass activity values at an overpotential of 60 mV in 0.5 M H2SO4. g Stability test of Mo2TiC2-PtNC through chronopotentiometry at a current density of 10 mA cm−2 in 0.5 M H2SO4. Source data are provided as a Source Data file.
