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13-07-2023 | Letter

Highly electronegative PtAu alloy for simultaneous hydrogen generation and ethanol upgrading

Authors: Kun Yin, Meng-Gang Li, Yu-Guang Chao, Yin Zhou, Shao-Jun Guo, Fang-Ze Liu, Hong-Bo Li

Published in: Rare Metals | Issue 9/2023

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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.

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Title: Highly electronegative PtAu alloy for simultaneous hydrogen generation and ethanol upgrading
Authors: Kun Yin
Meng-Gang Li
Yu-Guang Chao
Yin Zhou
Shao-Jun Guo
Fang-Ze Liu
Hong-Bo Li
Publication date: 13-07-2023
Publisher: Nonferrous Metals Society of China
Published in: Rare Metals / Issue 9/2023
Print ISSN: 1001-0521
Electronic ISSN: 1867-7185
DOI: https://doi.org/10.1007/s12598-023-02289-x

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