An ultra-thin 2D-CeO 2 non-carbon support for significantly improving the methanol oxidation and oxygen reduction reactions

A direct methanol fuel cell (DMFC) is a promising environmentally friendly energy device, owing to its low emission and high efficiency. Pt/C is the highly efficient catalyst for DMFCs, but Pt is a precious metal, and its weak interaction with a carbon support undermines the structure stability and...

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Bibliographic Details
Published in:New journal of chemistry 2024-08, Vol.48 (31), p.14013-14020
Main Authors: Li, Yingrong, Xu, Zhen, Guo, Xingxing, Xu, Feng
Format: Article
Language:English
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Summary:A direct methanol fuel cell (DMFC) is a promising environmentally friendly energy device, owing to its low emission and high efficiency. Pt/C is the highly efficient catalyst for DMFCs, but Pt is a precious metal, and its weak interaction with a carbon support undermines the structure stability and activity. Herein, two-dimensional ultra-thin cerium oxide (2D-CeO 2 ) was explored as a non-carbon support of the PtCu alloy catalyst for enhancing the electrocatalytic performance towards methanol oxidation (MOR) and oxygen reaction (ORR) reactions. The carbon-free PtCu/2D-CeO 2 catalysts show much better electro-activity and durability. Pt 0.25 Cu/2D-CeO 2 exhibits the highest current density of 29.94 mA cm −2 toward the MOR, and a comparable activity to PtCu/C towards the ORR. The exceptional properties, combined with the two-dimensional ultra-thin structure and high column of oxygen vacancies of CeO 2 , make the PtCu nanoparticles more evenly distributed and more active, significantly improving the activity and durability for the MOR and ORR.
ISSN:1144-0546
1369-9261
DOI:10.1039/D4NJ02876G