“… 16 In addition, metal particles supported on supports can promote the uniform dispersion of nanoparticles (NPs). For example, Pd-based bimetallic catalysts Pd-Cu 17 and Pd–Sn/Pd–Ni/CNT; 18 trimetallic catalysts PdCuBi/C, 19 Pd–Co–Ni/G 20 and Pd–Ru–Bi. 21 Thereby increasing the active center of electrocatalyst, promoting the transfer of electrons, and optimizing the performance of the catalyst.…”