Open AccessCarbon-supported Pd-Ir nanoalloys as cathodic catalyst for oxygen reduction reaction
Author(s) -
Yuchen Zhang,
Xingyue Xiao,
Dejia Geng,
Yu Dai,
Fan Xia
Publication year - 2020
Publication title -
nano express
Language(s) - English
Resource type - Journals
ISSN - 2632-959X
DOI - 10.1088/2632-959x/abca4d
Subject(s) - catalysis , transition metal , carbon fibers , oxygen , chemistry , cathodic protection , palladium , oxygen reduction reaction , metal , diffusion , inorganic chemistry , materials science , electrochemistry , electrode , composite number , organic chemistry , physics , composite material , thermodynamics
Pd as cathodic catalyst exhibits relatively low current density in mixing kinetic/diffusion controlled region. To improve catalytic activity of Pd, alloying Pd with another transition metal is an effective approach. Here, we prepared carbon-supported Pd-Ir nanoalloys (Pd-Ir/C) through impregnation method. Four types of Pd-Ir/C were designed and referred as Pd 19 Ir/C, Pd 9 Ir/C, Pd 3 Ir/C, and PdIr/C using nominal Pd/Ir atomic ratios of 19:1, 9:1, 3:1, and 1:1, respectively. The results showed that Pd and Ir formed the nanoalloy structures and Pd-Ir/C exhibited significantly improved catalytic activity for oxygen reduction reaction than Pd/C, indicating that Ir had important effect on Pd-Ir nanoalloys.