1D Pd-Based Nanomaterials as Efficient Electrocatalysts for Fuel Cells - Low-cost Nanomaterials: Toward Greener and More Efficient Energy Applications - page 332

Fig. 14 a, b SEM images of Pd-Au bimetallic heterostructure tubes (BHTs). c TEM image of
unsupported Pd-Au BHTs. HRTEM images of d a single particle e overlapped Pd-Au particles
near the edge of the pore area, and f Au-Au particle interface, respectively. Reprinted from
Ref. [ 80 ] with permission by the American Chemical Society
durability during the electrocatalytic studies. Figure 15 shows the CVs of various
catalysts supported on glassy carbon electrode (GCE) in N 2 -purged 1.0 M KOH
aqueous solution with ethanol at a sweep rate of 50 mV s -1 . By comparison with
Au nanotubes, Pd nanotubes, and commercial Pt/C catalysts, the synthesized Pd-
Au BHTs exhibited larger ECSA (Fig. 15 a), higher pseudo-area and mass activities
(Fig. 15 b-e), and higher electrochemical stability (Fig. 15 f), suggesting that they
can act as efficient Pt-free catalysts for fuel cells or other applications. The
enhanced electrocatalytic performance was attributed to the electronic structure,