Phase transfer-based high-efficiency recycling of precious metal electrocatalysts

Qing Zeng; Shaonan Tian; Yu Zhang; Hui Liu; Dong Chen; Xinlong Tian; Chaoquan Hu; Jun Yang

Green Chemical Engineering (Mar 2024)

Phase transfer-based high-efficiency recycling of precious metal electrocatalysts

Qing Zeng,
Shaonan Tian,
Yu Zhang,
Hui Liu,
Dong Chen,
Xinlong Tian,
Chaoquan Hu,
Jun Yang

Affiliations

Qing Zeng: State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China
Shaonan Tian: State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China
Yu Zhang: State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China
Hui Liu: State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China
Dong Chen: State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China; Corresponding author.
Xinlong Tian: State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan Provincial Key Lab of Fine Chemistry, School of Chemical Engineering and Technology, Hainan University, Haikou, 570228, China; Corresponding author.
Chaoquan Hu: State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China; Nanjing IPE Institute of Green Manufacturing Industry, Nanjing, 211100, Jiangsu, China
Jun Yang: State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China; Nanjing IPE Institute of Green Manufacturing Industry, Nanjing, 211100, Jiangsu, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China; Corresponding author.

Journal volume & issue: Vol. 5, no. 1
pp. 68 – 74

Abstract

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Recycling precious metals with high-efficiency is undoubtedly beneficial to optimize resource utilization for environmental remediation and sustainable development. Herein, we report an efficient route to recycle the palladium (Pd) and platinum (Pt) electrocatalysts using a phase transfer method. This strategy involves acidic dissolution of deactivated precious metal (Pd/Pt) electrocatalysts from their loading substrates, mixing with an ethanolic solution of dodecylamine (DDA), subsequent extraction of metal ions into a non-polar organic phase, and final reduction by sodium borohydride to reproduce high-performance electrocatalysts towards typical electrochemical reactions, e.g., oxygen reduction reaction (ORR) and ethanol oxidation reaction (EOR). In specific, the transfer efficiencies are up to 98% and the final recovery rate is over 85% for Pd and Pt electrocatalysts in each cycle. This approach symbolizes a facile and efficient way to recover precious metals, which might be applied to recycling a wide range of metals in various realms after appropriate modifications.

Published in Green Chemical Engineering

ISSN: 2666-9528 (Online)
Publisher: KeAi Communications Co. Ltd.
Country of publisher: China
LCC subjects: Technology: Chemical technology: Chemical engineering; Science: Chemistry: Organic chemistry: Biochemistry
Website: https://www.keaipublishing.com/en/journals/green-chemical-engineering/

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