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Single-Walled Carbon Nanotubes Wrapped CoFe2O4 Nanorods with Enriched Oxygen Vacancies for Efficient Overall Water Splitting
journal contribution
posted on 2018-11-30, 00:00 authored by Yu Ding, Jun Zhao, Wenqing Zhang, Jian Zhang, Xijie Chen, Fengchun Yang, Xin ZhangThe
development of highly active and stable non-noble-metal electrocatalysts
for water splitting is the main title toward energy conversion systems.
CoFe2O4 has been reported as a promising oxygen
evolution reaction (OER) electrocatalyst. However, CoFe2O4 showed poor conductivity and sluggish electrocatalysis
in the hydrogen evolution reaction (HER). In this work a new hybrid
catalyst was synthesized based on single-walled carbon nanotube (SWNT)-wrapped
CoFe2O4 nanorods. The synergistic effect between
CoFe2O4 nanorods and SWNTs can not only increase
the oxygen vacancies and optimize the electronic structure of the
composite but also facilitate the adsorption and stabilization of
hydroxyl, which could significantly improve both the OER and HER performances.
Besides, the addition of SWNTs would reduce the aggregating and tubes
bundling in the composites and further improve the stability of the
hybrid. All of the excellent performances indicated CoFe2O4/SWNTs as a promising bifunctional electrocatalyst for
OER and HER, as well as overall water splitting.
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