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Mo-based MXenes as highly selective two-electron oxygen reduction catalysts for H2O2 production
Xue, Fengjuan1,2,3; Kang, Shuai2,4; Pan, Ziwei2,4; Li, Lejing5; Hu, Zhuofeng6; Sheng, Xiong2,7; Li, Bangxing7; Lu, Wenqiang2,4; Wang, Liang2,4; Nie, Ming1
2024-07-01
摘要Hydrogen peroxide production through the electrochemical two-electron oxygen reduction presents a compelling alternative to the anthraquinone process due to the cheap starting materials and low operating temperature and pressure. Transition metal species featuring with multi-active sites, offer high electrochemical activity and selectivity. MXenes, distinguished by excellent electrical conductivity and the two-dimensional structure facilitating smooth ion transportation, further enhance the prospects of this production approach. In this study, three Mo-based MXenes were synthesized: Mo2TiC2Fx, Mo2Ti2C3Fx and Mo2CFx. Among these, Mo2TiC2Fx emerged as the most promising catalyst for 2e-ORR, achieving a remarkable H2O2 yield of up to 0.54 mol & sdot;gcat over, it also exhibits a high H2O2 selectivity ranging from 81.3 % at 0.2 V to 94.1 % at 0.6 V vs. RHE, coupled with an impressive faradaic efficiency of 76.4 % at 0.4 V using H-cell. Further analysis indicates that the superior 2e- ORR performance can be attributed to the presence of metallic Mo on the surface of Mo2TiC2Fx.
关键词Hydrogen peroxide production Mo-based MXenes Electrocatalysts Oxygen reduction reaction Highly selective
DOI10.1016/j.electacta.2024.144356
发表期刊ELECTROCHIMICA ACTA
ISSN0013-4686
卷号491页码:8
通讯作者Kang, Shuai(kangshuai@cigit.ac.cn) ; Li, Lejing(lejing.li@rub.de) ; Nie, Ming(nieming@swu.edu.cn)
收录类别SCI
WOS记录号WOS:001300470600001
语种英语