Stereo Assembly of Bimetallic PtPd on Ti3C2Tx/PProDOT for Efficient Methanol Oxidation Reaction in Both Acidic and Alkaline Media

IF 13 2区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Small Pub Date : 2025-03-19 DOI:10.1002/smll.202500402

Shuyue Xie, Tursun Abdiryim, Ruxangul Jamal, Guoliang Zhang, Xinsheng Tang, Yu Zhang, Yanyan Song, Nuramina Abdukirim

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Abstract

The rational construction of efficient and stable electrocatalysts for methanol oxidation reaction (MOR) in acidic and alkaline media affects the commercialization of direct methanol fuel cells (DMFCs). Here, poly(3,4-propylenedioxythiophene) (PProDOT)-embedded Ti₃C₂T_x flakes for the growth of platinum and palladium bimetallic nanoparticles (PtPd) by a chemically reduced hydrothermal process are assembled. The constructed Ti₃C₂T_x/PProDOT/PtPd hybrids exhibit 3D-layered stereoscopic structures. After the embedding of PProDOT, the re-stacking of MXene flakes is suppressed and the interlayer spacing between flakes is extended, allowing the Ti₃C₂T_x/PProDOT interface to promote nanoparticle deposition, active site exposure, and charge transport. The electrochemical test outcomes reveal that the catalytic activity of Ti₃C₂T_x/PProDOT/PtPd for MOR far exceeds that of Ti₃C₂T_x/PtPd and Pt/C. In acidic electrolytes, the mass activity (MA) of Ti₃C₂T_x/PProDOT/PtPd is 2206.1 mA mg⁻¹, which is 4.4 and 5.8 times higher than that of Ti₃C₂T_x/PtPd and Pt/C, respectively. In alkaline electrolytes, the MA of Ti₃C₂T_x/PProDOT/PtPd reaches 4180 mA mg⁻¹, which is 2.1 and 4.8 times higher than that of Ti₃C₂T_x/PtPd and Pt/C, respectively. Meanwhile, its stability and CO tolerance improve significantly. Besides, Ti₃C₂T_x/PProDOT/PtPd also exhibits enhanced catalytic activity toward ethanol oxidation.

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来源期刊

Small 工程技术-材料科学：综合

CiteScore

17.70

自引率

3.80%

发文量

1830

审稿时长

2.1 months

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