MXene-supported PtCo bimetallic catalyst for high-performance methanol oxidation AITranslate

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Chinese Library Classification Number:TM911.4[电气工程—电力电子与电力传动];O643.36[理学—物理化学]

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The methanol oxidation reaction is a critical half-reaction in direct methanol fuel cells(DMFCs),but its efficiency is limited by the low activity and poor stability of traditional electrocatalysts.This study reports the development of a high-performance PtCo/Mo₂CT_xcatalyst for methanol oxidation in DMFCs.Synthesized by depositing PtCo alloy nanoparticles on Mo₂CT_xsheets prepared via cetyltrimethylammonium bromide-assisted etching of Mo2Ga2C,the PtCo/Mo₂CT_xcatalyst achieved enhanced interlayer spacing and excellent dispersion of active sites.The optimized PtCo/Mo₂CT_xcatalyst exhibited remarkable catalytic activity,reaching a mass activity of 2296 mA·mg_Pt^-1—6.5 times that of commercial Pt/C.Electrochemical studies confirmed the catalyst's low charge transfer resistance,high electrochemical surface area,and strong CO antipoisoning ability.Stability tests showed that the catalyst retained 62.26%activity after 1000 cycles.These improvements are attributed to the synergistic effects between Pt and Co,the conductive and layered structure of Mo₂CT_x,making PtCo/Mo₂CT_xa promising,durable anode material for DMFCs in sustainable energy applications.