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Mo-Based MXene-Supported Pt Nanoparticles for Highly Durable Oxygen Reduction in Acidic Electrolytes
Xue, Fengjuan1,2; Fu, Xie1,3; Kang, Shuai1,3; Sheng, Xiong1,4; Li, Bangxing4; Shen, Pei Kang5; Zhu, Jinliang5; Nie, Ming2; Lu, Shun1; Lu, Wenqiang1,3
2024-03-05
摘要Proton exchange membrane fuel cells suffer from performance degradation caused by the oxidation and corrosion of carbon supports. Metal-platinum interactions can enhance the catalytic activity and stability due to compositional and geometric effects. Two-dimensional MXenes have been intensively studied in recent years and are expanding rapidly in both types and applications. Recently, ORR performances of dual-transition metal MXenes with abundant surface Mo vacancy have been demonstrated as efficient electrocatalysts toward oxygen reduction reaction in an alkaline solution. In this study, the electrochemical performances of Mo-based MXenes-supported Pt electrocatalysts toward oxygen reduction reaction are investigated in an acidic solution. Compared with the Pt/C catalysts, Pt/Mo2TiC2F x exhibits improved durability, with a 28.7 mV negative shift of the half-wave potential after continuous scanning of 5000 cycles, which is superior to Pt/C with an 84.3 mV negative shift. The proton-exchange membrane fuel cell with Pt/Mo2TiC2F (x) as the cathode catalyst also shows excellent activity and stability with a 0.7% potential fade after 9 h. According to the morphology evolution during oxygen reduction, the excellence in electrochemistry is due to the coherent interface between Pt and MXene, which provides a high binding force between Pt nanoparticles and the supporting materials.
关键词oxygen reduction reaction Mo-based MXenes Pt electrocatalysts high stability acidic electrolyte
DOI10.1021/acsanm.3c06236
发表期刊ACS APPLIED NANO MATERIALS
卷号7期号:6页码:6305-6314
通讯作者Kang, Shuai(kangshuai@cigit.ac.cn)
收录类别SCI
WOS记录号WOS:001180306000001
语种英语