821916.fig.003a
(a)
821916.fig.003b
(b)
821916.fig.003c
(c)
821916.fig.003d
(d)
Figure 3: Linear seep voltammograms of PdCo powders (positive scans) in nitrogen-saturated 0.5 M sulfuric acid solution: (a) Before heat treatment: Curve (a) Pd3Co1, curve (b) Pd1Co1, and curve (c) Pd1Co3. (b–d) After heat treatment at 500°C: Curve (a) first sweep and curve (b) second sweep after reduction with hydrogen. Reproduced with permission from [42]. Copyright 1986, Elsevier.