Figure 2: RDE and fuel cell testing. | Nature Communications

Figure 2: RDE and fuel cell testing.

From: Highly active oxygen reduction non-platinum group metal electrocatalyst without direct metal–nitrogen coordination

Figure 2

(a) Rotating disk electrode (RDE) ORR polarization plots collected with FePhen@MOF-ArNH3, Basolite-ArNH3 and Tanaka Pt/C in O2 saturated electrolyte (0.1 M HClO4 and 0.1 M KOH) at 20 mV s−1 with rotation rate of 1,600 r.p.m. at room temperature. (b) H2/O2 fuel cell iR-corrected Tafel plot for FePhen@MOF-ArNH3 cathode (loading of 3 mg cm−2) using Nafion (NRE 211) membrane. (c) H2/air fuel cell polarization curve and corresponding power density curve for same MEA from a. A Pt/C (0.4 mgPt cm−2 loading) cathode reference was used for comparison. (d) H2/O2 fuel cell polarization curves of FePhen@MOF-ArNH3 and Pt/C cathode measured initially and after 10K cycles (using 3 s hold and pulses between 0.6 and 1.0 V under nitrogen flow).

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