期刊
RSC ADVANCES
卷 5, 期 90, 页码 73834-73841出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ra14713a
关键词
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资金
- Shanghai Institute of Ceramics
- Key Project for Young Researcher of State Key Laboratory of High Performance Ceramics and Superfine Microstructure
- One Hundred Talent Plan of Chinese Academy of Sciences
- National Natural Science Foundation of China [21307145]
- Youth Science and Technology Talents Sail Program of Shanghai Municipal Science and the Technology Commission [15YF1413800]
- Shanghai Government [14DZ2261200]
It is of great concern to explore new electrocatalysts for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). In this study, spinel NiFe2O4 nanoparticles cross-linked with the outer walls of multiwalled carbon nanotubes (MWCNTs) were successfully prepared by a simple, scalable hydrothermal method. The as-synthesized NiFe2O4/MWCNT nanohybrid shows not only a better ORR catalytic activity than pure NiFe2O4 and MWCNTs, but also a close four-electron reaction pathway. Meanwhile, the NiFe2O4/MWCNT nanohybrid exhibits a much higher OER catalytic activity when compared to NiFe2O4, MWCNTs and commercial Pt/C in terms of the onset potential and current density. Moreover, the NiFe2O4/MWCNT nanohybrid demonstrates the preeminent long-term durability measured by the current-time chronoamperometric test for both the ORR and OER, which evidently outperforms commercial Pt/C. The excellent bi-functional electrocatalytic activities of the NiFe2O4/MWCNT nanohybrid are attributed to the strong coupling between the NiFe2O4 nanoparticles and the MWCNTs as well as the network structure.
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