Iron and nitrogen-doped carbon nanosphere preparation method and oxygen reduction application

Abstract

The invention provides an iron and nitrogen-doped carbon nanosphere preparation method and application of the nanosphere in oxygen reduction. The dopamine hydrochloride is used for synthesizing a nitrogen source supply object polydopamine under alkaline condition, and then the surface of ferriferrous oxide nanosphere is coated by the polydopamine; the ferriferrous oxide nanosphere coated by the polydopamine is subjected to a reaction with glucose in a high pressure reaction vessel, and under nitrogen condition, high temperature calcining is carried out to obtain the iron and nitrogen-doped carbon nanosphere. The synthesis of the iron and nitrogen-doped carbon nanosphere takes glucose as a raw material, and the ferriferrous oxide nanosphere coated by the polydopamine is taken as a corrosiontemplate and the nitrogen source. The nitrogen-doped carbon nanosphere used in a electrocatalysis oxygen reduction reaction (ORR) has good effect and good endurance, an initial potential relative standard hydrogen electrode of reduction oxygen is 0.949 V, the efficiency after endurance test can still reach more than 85%, after addition of methanol, the usage efficiency can still reach 94%, and the nitrogen-doped carbon nanosphere has good anti-methanol effect.

Description

technical field [0001] The invention discloses a method for preparing iron-nitrogen double-doped carbon nano-microspheres and its application in oxygen reduction, belonging to the technical fields of nano-materials, catalytic technology, and the like. Background technique [0002] With the rapid consumption of fossil energy and the aggravation of environmental pollution, the search for clean and efficient new energy has become a research hotspot. High-efficiency, low-emission fuel cell energy has attracted widespread attention. However, in the fuel cell reaction process, the efficiency of the fuel cell is greatly limited because the oxygen reduction kinetics of the cathode is much slower than the hydrogen oxidation reaction of the anode. Therefore, designing and synthesizing efficient oxygen reduction catalysts is of great significance for promoting the development of fuel cells. [0003] Due to the unique size effect, nanomaterials often have many novel physical and chemi...

AI Technical Summary

Problems solved by technology

However, in the fuel cell reaction process, the efficiency of the fuel cell is greatly limited because the oxygen reduction kinetics of the cathode is much slower than that of the anode hydrogen oxidation reaction.