Extended Data Fig. 1: Comparison of ORR activities on Polycrystalline Pt (Poly_Pt) and Polycrystalline Pd (Poly_Pd) in acidic and alkaline electrolytes.
From: Rational design of high-performance low-loading oxygen reduction catalysts for alkaline fuel cells
a, O2-saturated 0.1 M HClO4. b, O2-saturated 0.01 M HClO4. c, O2-saturated 0.01 M KOH. d, O2-saturated 0.1 M KOH. e, O2-saturated 1.0 M KOH. Scan rate: 5 mV s−1; rotation rate: 1,600 rpm. f, Specific activity measured at 0.85 V vs. RHE. The comparison showed that the ORR performance of polycrystalline Pd could rival, and even surpass, that of polycrystalline Pt at higher pH values, despite polycrystalline Pd being significantly less active than Pt at lower pHs.
