Nesting doll type catalyst with surface carbon-rich defect as well as preparation method and application of nesting doll type catalyst

• Main Authors: REN MINGYANG, ZHANG CHENGHUA, WEI YUXUE, SUN SONG
• Format: Patent
• Language: Chinese; English
• Published: 06.06.2023
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING

The invention discloses a nesting doll type catalyst with a carbon-rich defect on the surface as well as a preparation method and application of the nesting doll type catalyst. The preparation method of the catalyst comprises five steps of preparation of FeN particles, preparation of an iron carbide layer, preparation of an auxiliary agent layer, preparation of a carbon layer and treatment of the carbon-rich defect. According to the catalyst, iron nitride serves as a core, an iron carbide layer derived from the iron nitride serves as a first layer, a coating auxiliary serves as a second layer, and a carbon shell is adopted as the outermost layer; iron nitride is used as a precursor, iron carbide is prepared through in-situ derivation, the stability of the iron carbide is improved, and effective regulation and control of the iron carbide structure can be achieved; the carbon shell can effectively fix the assistant and prevent the assistant from losing; carbon defects on the surface of the outermost carbon shel