Corresponding Author

Wei CHEN(chenw@sari.ac.cn)


Monodispersed PdCu alloy nanoparticles were synthesized by co-reduction of Cu(acac)2 and Pd(acac)2 with 1, 2-hexadecanediol. The spherical and popcorn-like shapes of PdCu alloy nanoparticles were obtained by changing the ratios of mixed surface protecting ligands of 1-octadecene, and oleylamine or oleic acid. TEM and XRD measurements showed that both PdCu nanoparticles are alloy nanocrystals dominated with (111) planes and the average sizes are 12.7 ± 0.18 and 20.4 ± 0.31 nm for he spherical and popcorn-like PdCu nanoparticles, respectively. The electrocatalytic activities of the PdCu nanocrystals for formic acid oxidation were evaluated by electrochemical cyclic voltammetry (CV). The result showed that the peak current density of formic acid oxidation on the spherical PdCu nanocrystals is 6.5 times higher than that on the popcorn-like PdCu nanoparticles. Moreover, by comparing the ratio of the current density of the first anodic peak to the cathodic peak, the spherical PdCu nanocrystals exhibit better tolerance to CO poisoning than that of the popcorn-like counterparts. Chronoamperometric measurement indicated that the spherical PdCu nanocrystals have better activity and stability for formic acid oxidation compared to the popcorn-like PdCu nanoparticles.

Graphical Abstract


PdCu alloy, nanocrystals, electrocatalysis, formic acid oxidation

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