KMS Chongqing Institute of Green and Intelligent Technology, CAS
Mo-Based MXene-Supported Pt Nanoparticles for Highly Durable Oxygen Reduction in Acidic Electrolytes | |
Xue, Fengjuan1,2; Fu, Xie1,3; Kang, Shuai1,3![]() ![]() ![]() | |
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 |
DOI | 10.1021/acsanm.3c06236 |
发表期刊 | ACS APPLIED NANO MATERIALS
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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 |