Dendritic defect-rich palladium–copper–cobalt nanoalloys as robust multifunctional non-platinum electrocatalysts for fuel cells

Chaozhong Li, Qiang Yuan (), Bing Ni, Ting He, Siming Zhang, Yong Long, Lin Gu and Xun Wang ()
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Chaozhong Li: Guizhou University
Qiang Yuan: Guizhou University
Bing Ni: Tsinghua University
Ting He: Tsinghua University
Siming Zhang: Tsinghua University
Yong Long: Tsinghua University
Lin Gu: Chinese Academy of Sciences and Beijing National Laboratory for Condensed Matter Physics
Xun Wang: Tsinghua University

Nature Communications, 2018, vol. 9, issue 1, 1-9

Abstract: Abstract Recently, the development of high-performance non-platinum electrocatalysts for fuel cell applications has been gaining attention. Palladium-based nanoalloys are considered as promising candidates to substitute platinum catalysts for cathodic and anodic reactions in fuel cells. Here, we develop a facile route to synthesize dendritic palladium–copper–cobalt trimetallic nanoalloys as robust multifunctional electrocatalysts for oxygen reduction and formic acid oxidation. To the best of our knowledge, the mass activities of the dendritic Pd59Cu30Co11 nanoalloy toward oxygen reduction and formic acid oxidation are higher than those previously reported for non-platinum metal nanocatalysts. The Pd59Cu30Co11 nanoalloys also exhibit superior durability for oxygen reduction and formic acid oxidation as well as good antimethanol/ethanol interference ability compared to a commercial platinum/carbon catalyst. The high performance of the dendritic Pd59Cu30Co11 nanoalloys is attributed to a combination of effects, including defects, a synergistic effect, change of d-band center of palladium, and surface strain.

Date: 2018
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DOI: 10.1038/s41467-018-06043-1

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