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Erschienen in: Rare Metals 5/2023

16.02.2023 | Original Article

MoO3/C-supported Pd nanoparticles as an efficient bifunctional electrocatalyst for ethanol oxidation and oxygen reduction reactions

verfasst von: Mei-Ling Wang, Jin Zhao, Jin-Jin Wang, Jun-Ming Zhang, Yu-Zhu Tian, Zhi-Zhu Yue, Dong Li, Tian-Jun Hu, Jian-Feng Jia, Hai-Shun Wu

Erschienen in: Rare Metals | Ausgabe 5/2023

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Abstract

metal oxide electronic interactions in composite electrocatalysts have a considerable impact on their catalytic capability. In this study, we successfully synthesized an electrocatalytic material composed of MoO3/C species-supported Pd nanoparticles (Pd-MoO3/C) using a convenient hydrothermal method, which exhibited excellent catalytic activities for both ethanol oxidation and oxygen reduction in KOH media. The specific activity of Pd-MoO3/C toward ethanol oxidation with MoO3 loading (40 wt%) was ~ 2.6 times greater than that for the commercial Pd/C (10 wt%) with the same Pd content. In particular, the activity could effectively hold up to ~ 60% of its maximum activity after 500-cycle tests, demonstrating improved cyclical stability. Notably, the fast electron transfer kinetics toward oxygen reduction for Pd-MoO3/C (40%) were also comparable to those of commercial Pt/C (20 wt%) catalysts. These superior electrochemical features are primarily derived from the stronger electronic coupling between Pd and MoO3 through charge transfer, which can supply more active centers and improve the anti-poisoning ability. Meanwhile, the MoO3 species in the Pd-MoO3/C composite may provide additional benefits in terms of electrical conductivity and dispersion.

Graphical Abstract

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Metadaten
Titel
MoO3/C-supported Pd nanoparticles as an efficient bifunctional electrocatalyst for ethanol oxidation and oxygen reduction reactions
verfasst von
Mei-Ling Wang
Jin Zhao
Jin-Jin Wang
Jun-Ming Zhang
Yu-Zhu Tian
Zhi-Zhu Yue
Dong Li
Tian-Jun Hu
Jian-Feng Jia
Hai-Shun Wu
Publikationsdatum
16.02.2023
Verlag
Nonferrous Metals Society of China
Erschienen in
Rare Metals / Ausgabe 5/2023
Print ISSN: 1001-0521
Elektronische ISSN: 1867-7185
DOI
https://doi.org/10.1007/s12598-022-02211-x

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