Figure 4: Electrochemical properties of Pt/C/Ni–B and density functional theory analysis. | Nature Communications

Figure 4: Electrochemical properties of Pt/C/Ni–B and density functional theory analysis.

From: Amorphous nickel boride membrane on a platinum–nickel alloy surface for enhanced oxygen reduction reaction

Figure 4

(a) ORR polarization curves and (inset) mass activities of Pt/C and Pt/C/Ni–B at 0.9 V versus RHE. (b,c) TEM images of Pt/C (b) and Pt/C/Ni–B (c). (d) Adsorption of O on the hollow site of BO2/Pt(111), including valence state of B and electron transfer from Pt(111) to BO2 and O. (e) Adsorption of OH on the hollow site of BO2/Pt(111), including valence state of B and electron transfer from Pt(111) to BO2 and OH. (f) The experimental current density as a function of the calculated binding energy of O (blue) and OH (red), showing optimal shift in binding energy for the maximum ORR activity by the arrow. The nominal maximum J′max with respect to Pt(111) is deduced from the activity volcano for ORR proposed by Nørskov et al. Scale bars, 50 nm.

Back to article page