Helical chiral carbon nanotubes loaded with highly dispersed ultra-small cobalt-iron-platinum alloy composites for oxygen evolution and oxygen reduction reaction

In this study, we successfully prepared CH-CNT@Fe-Co-Pt x by combining chiral helical nanostructure , high conductivity, high electro-catalytic activity of iron-cobalt transition metals and precious platinum. The material used C 18 - L -Clu as the soft template, polypyrrole as the carbon source and nitrogen source. The precursor cobalt iron ions were then loaded onto the chiral amino acid template. Using the displacement reaction, a spot of platinum metal was successfully introduced into the composite to obtain CH-CNT@Fe-Co-Pt x composite material. According to the reaction mechanism steps of OER/ORR in alkaline solution, Fe-Co-Pt as the active site adsorbed OH - in OER and adsorbed H 2 O molecules in ORR. The tafer slope of OER and ORR for catalyst CH-CNT@Fe-Co-Pt 2 reached 35.0 mV dec −1 and 60.8 mV dec −1 , respectively. And the current density of H-CNT@Fe-Co-Pt 2 retained 84% and 91.5 % respectively after a long time i-t test. Moreover, the number of transferred electrons of CH-CNT@Fe-Co-Pt 2 in the ORR reaction reaches 3.90. This work provides new ideas for the research of chiral carbon nanomaterials in the field of electro-catalytic energy, and provides a new method for the development of efficient and low-cost energy electro-catalysts.