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

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 MoO 3 /C species-supported Pd nanoparticles (Pd-MoO 3 /C) using a convenient hydrothermal me...

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Bibliographic Details
Published in:Rare metals 2023-05, Vol.42 (5), p.1516-1525
Main Authors: Wang, Mei-Ling, Zhao, Jin, Wang, Jin-Jin, Zhang, Jun-Ming, Tian, Yu-Zhu, Yue, Zhi-Zhu, Li, Dong, Hu, Tian-Jun, Jia, Jian-Feng, Wu, Hai-Shun
Format: Article
Language:English
Subjects:
Biomaterials
Charge transfer
Chemical reduction
Chemistry and Materials Science
Electrical resistivity
Electrocatalysts
Electron transfer
Energy
Ethanol
Materials Engineering
Materials Science
Metal oxides
Metallic Materials
Molybdenum trioxide
Nanoparticles
Nanoscale Science and Technology
Original Article
Oxidation
Oxygen reduction reactions
Palladium
Physical Chemistry
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Summary: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 MoO 3 /C species-supported Pd nanoparticles (Pd-MoO 3 /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-MoO 3 /C toward ethanol oxidation with MoO 3 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-MoO 3 /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 MoO 3 through charge transfer, which can supply more active centers and improve the anti-poisoning ability. Meanwhile, the MoO 3 species in the Pd-MoO 3 /C composite may provide additional benefits in terms of electrical conductivity and dispersion. Graphical Abstract
ISSN:1001-0521
1867-7185
DOI:10.1007/s12598-022-02211-x