Tuning the Product Selectivity toward the High Yield of Glyceric Acid in Pt−CeO2/CNT Electrocatalyzed Oxidation of Glycerol

Electrocatalytic oxidation of glycerol is a highly efficient way for upgrading glycerol toward fine chemicals. Currently, electro‐oxidation of glycerol into the high value‐added C3 products remains a big challenge because of the poor catalytic activity, low selectivity, and high cost of the noble me...

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Bibliographic Details
Published in:ChemCatChem 2022-08, Vol.14 (16), p.n/a
Main Authors: Li, Jiefei, Li, Zhenyu, Zheng, Zexuan, Zhang, Xueqiong, Zhang, Hao, Wei, Hang, Chu, Haibin
Format: Article
Language:English
Subjects:
Carbon nanotubes
Catalysts
Catalytic activity
Ceria
Cerium oxides
Conversion
Electrocatalysis
Fine chemicals
Glyceric acid
Glycerol
Glycerol oxidation
Noble metals
Oxidation
Platinum
Recycling
Selectivity
Stability
Tuning
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Summary:Electrocatalytic oxidation of glycerol is a highly efficient way for upgrading glycerol toward fine chemicals. Currently, electro‐oxidation of glycerol into the high value‐added C3 products remains a big challenge because of the poor catalytic activity, low selectivity, and high cost of the noble metal catalysts, especially in the alkaline medium. Here, we report that the Pt−CeO2/CNT (CNT=carbon nanotubes) catalyst remarkably promotes the conversion (86.5 % vs. 37.6 %) and recycling stability for glycerol electro‐oxidation reaction, as compared with Pt/CNT. However, the improved catalytic activity of Pt−CeO2/CNT is accompanied by the further oxidation of C3 products including glyceric acid (GLYA). By tuning the product distribution by the ratio of CeO2 and CNT, applied potential, and the Pt loading amount, the high selectivities of C3 products (95 %) and GLYA (59 %) are achieved together with the high glycerol conversion (86 %), leading to the impressive yields of C3 products (81 %) and GLYA (50 %). The unique contributions of CeO2 includes not only the enhanced catalytic activity and recycling stability, but also the suppressed further oxidation of GLYA. Moreover, higher yield of GLYA is reached over Pt−CeO2/CNT even with half loading of Pt, as compared with Pt/CNT. Biomass conversion: Electro‐oxidation of glycerol over the Pt/CNT catalyst suffers from the poor activity, low glyceric acid (GLYA) selectivity, and high cost of the noble metal. The incorporation of CeO2 into Pt/CNT achieves much enhanced yield of GLYA with even half dosage of Pt.
ISSN:1867-3880
1867-3899
DOI:10.1002/cctc.202200509