Highly electronegative PtAu alloy for simultaneous hydrogen generation and ethanol upgrading

Simultaneous electrochemical synthesis of high-value-added chemicals and hydrogen is a promising technology for efficient carbon utilization and renewable energy storage. However, the lack of rational guidance for designing efficient catalysts for electrosynthesis significantly hinders its developme...

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Bibliographic Details
Published in:Rare metals 2023-09, Vol.42 (9), p.2949-2956
Main Authors: Yin, Kun, Li, Meng-Gang, Chao, Yu-Guang, Zhou, Yin, Guo, Shao-Jun, Liu, Fang-Ze, Li, Hong-Bo
Format: Article
Language:English
Subjects:
Biomaterials
Carbon
Catalysts
Chemical synthesis
Chemistry and Materials Science
Electronegativity
Energy
Energy storage
Ethanol
Ethyl acetate
Hydrogen
Hydrogen evolution
Hydrogen production
Letter
Materials Engineering
Materials Science
Metallic Materials
Nanomaterials
Nanoparticles
Nanoscale Science and Technology
New technology
Performance degradation
Physical Chemistry
Platinum
Stability tests
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Summary:Simultaneous electrochemical synthesis of high-value-added chemicals and hydrogen is a promising technology for efficient carbon utilization and renewable energy storage. However, the lack of rational guidance for designing efficient catalysts for electrosynthesis significantly hinders its development. A new technology of simultaneous generation of hydrogen and upgrading of ethanol by using catalysts based on PtAu nanoparticles (NPs) was reported. At a current density of 10 mA·cm −2 , the cell using PtAu nanoparticles had a low onset potential of 0.67 V, much lower than those of PtIr NPs (0.85 V) and commercial platinum on carbon catalyst (Pt/C) (0.92 V). PtAu NPs also possessed higher Faraday efficiencies of 79% for ethyl acetate production and 95% for hydrogen evolution than PtIr NPs and Pt/C. In addition, the cell based on PtAu NPs exhibited no obvious degradation of performance after a current-time stability test for 1000 s. Further study revealed that the introduction of highly electronegative Au into Pt-based nanomaterials could facilitate the activation of ethanol. This work can benefit the rational design of catalysts with enhanced selectivity of electrosynthesis. Graphical abstract
ISSN:1001-0521
1867-7185
DOI:10.1007/s12598-023-02289-x