Fig. 4: Quantitative characterization of ORR activity of PtNi and Ga-PtNi nanoparticles during potential cycles. | Nature Communications

Fig. 4: Quantitative characterization of ORR activity of PtNi and Ga-PtNi nanoparticles during potential cycles.

From: Atomic-scale 3D structural dynamics and functional degradation of Pt alloy nanocatalysts during the oxygen reduction reaction

Fig. 4

a–f The 3D ORR activity [\({\mathrm{ln}}\left(j/{j}_{{{\rm{Pt}}}(111)}\right)\)] distribution of pristine PtNi (a), 12k cycled PtNi (b), pristine Ga-PtNi (c), 4k cycled Ga-PtNi (d), 8k cycled Ga-PtNi (e), and 12k cycled Ga-PtNi (f). Note that, the representative nanoparticles shown in (a–f) are PtNi-pristine-p2, PtNi-12k-p1, Ga-PtNi-pristine-p1, Ga-PtNi-4k-p1, Ga-PtNi-8k-p2, and Ga-PtNi-12k-p2 (Supplementary Tables 1 and 2). g Average of \((j/{j}_{{{\rm{Pt}}}(111)})\) during potential cycles of PtNi and Ga-PtNi nanoparticles. Note that the values and error bars for each cycle corresponding to (g) represent the averages and standard deviations obtained from 2 PtNi pristine, 3 Ga-PtNi pristine, 2 Ga-PtNi 4k, 2 Ga-PtNi 8k, and 2 Ga-PtNi 12k samples. We have only one particle for PtNi 12k, and the error bar cannot be defined in the same manner in this case. Source data for dot or line plots in this figure are provided as a Source Data file.

Back to article page