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Updated: Feb 16, 2026

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production
Published on: December 6, 2021
An effective bifunctional electrocatalysts: Controlled growth of CoFe alloy nanoparticles supported on N-doped carbon
Xuejia Ma1, Hui Chai1, Yali Cao1
1Key Laboratory of Energy Material Chemistry, Ministry of Education, Key Laboratory of Advanced Functional Materials, Autonomous Region, Institute of Applied Chemistry, Xinjiang University, Urumqi 830046, Xinjiang, PR China.
Abstract:
Exploring efficient and inexpensive bi-functional catalysts for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is a critical work for developing the fuel cells and the metal-air batteries. Nitrogen-doped carbon and transition metal (Fe or Co) has been demonstrated as promising catalyst due to the synergetic effect. In this work, the CoFe alloy nanoparticles supported on N-doped carbon nanotubes (CoFe@NCNTs) are synthetized by one-step annealing the precursors, without any templates. The as-prepared materials show both extraordinary electrocatalysis activity for ORR and OER in alkaline solution: a diffusion current density of -5.53 mA cm-2, approximate four-electron selectivity as ORR catalyst, a potential of 0.842 V at 10 mA cm-2. Specifically, the CoFe@NCNTs present a Tafel slope of 60.16 mV dec-1 as OER catalyst and the variance (ΔE) is below 1.017 V in 0.1 M KOH for the OER and ORR.
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