Issue 19, 2023

Precious metal catalyst recycling through photocatalytic dissolution

Abstract

Precious metal (PM) catalysts have been widely used in the chemical industry owing to their high activity, selectivity and stability. The key problems are their scarcity and high cost. Therefore, the recycling of PMs from deactivated catalysts becomes a critical step in industry. Here, we developed a novel recycling method for the photoresponsive carrier-supported Au-based PM catalyst through an eco-friendly photocatalytic dissolution technique. Au is recovered effectively from deactivated Au/CeO2 using itself as the photocatalyst and re-deposited on the remaining CeO2. The revived Au/CeO2 exhibits comparable performance with the fresh catalyst during ethane dehydrogenation either in the absence or in the presence of CO2. Similar results can also be obtained over the Pt/CeO2 catalyst recovered from a deactivated catalyst using this all-in-one dissolution–deposition technique. In comparison with the conventional methods, this recycling preparation offers a more environmentally friendly and long-lasting method for efficiently recycling PMs and producing regenerated PM catalysts.

Graphical abstract: Precious metal catalyst recycling through photocatalytic dissolution

Supplementary files

Article information

Article type
Communication
Submitted
12 7 2023
Accepted
16 8 2023
First published
18 8 2023

Green Chem., 2023,25, 7518-7523

Precious metal catalyst recycling through photocatalytic dissolution

Y. Chen, H. He, S. Xu, Z. Zou, W. Hua, Z. Bian, H. Li and Y. Yue, Green Chem., 2023, 25, 7518 DOI: 10.1039/D3GC02518G

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