Fig. 10From: Recent developments of nano-structured materials as the catalysts for oxygen reduction reaction(reprinted with permission from Ref. [91] Copyright @ 2018 Elsevier)a TEM images of Pd/C, b Pd–Ni/C, c CV curves of the Pd/C, Ni/C, and Pd–Ni/C catalysts according to the atomic ratio in 0.5 M H2SO4, d mass and specific activities of fabricated various electro-catalysts at 0.1 VBack to article page