Characterization and Thermal Stability Properties of Bulk Hierarchical Porous Pd Prepared by Kirkendall Effect and Dealloying Method

Figure 3

FE-SEM images of BHPPd after being dealloyed in different concentration of HCl solutions. (a, b) 0.1 M HCl, 10 d; (c, d) 0.5 M HCl, 10 d.

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(b)

(c)

(d)