• 专利标题:   Nitrogen-doped graphene-iron-based nanoparticles composite catalyst useful in e.g. fuel cell and lithium-air battery, comprises nitrogen-doped graphene, and composite catalyst of iron and iron-based iron nitride nanoparticles.
  • 专利号:   CN105170169-A, CN105170169-B
  • 发明人:   ZHANG Z, CUI X
  • 专利权人:   UNIV TSINGHUA
  • 国际专利分类:   B01J027/24, H01M004/90
  • 专利详细信息:   CN105170169-A 23 Dec 2015 B01J-027/24 201607 Pages: 10 English
  • 申请详细信息:   CN105170169-A CN10364938 26 Jun 2015
  • 优先权号:   CN10364938

▎ 摘  要

NOVELTY - A nitrogen-doped graphene-iron-based nanoparticles composite catalyst contains nitrogen-doped graphene, and composite catalyst of iron and iron-based iron nitride nanoparticles in a weight ratio of 5:1-10:1. The nitrogen-doped graphene-iron-based nanoparticles composite catalyst has a nitrogen content of 5-13%. USE - Nitrogen-doped graphene-iron-based nanoparticles composite catalyst is useful in fuel cell, lithium-air battery and catalytic oxygen reduction reaction system. ADVANTAGE - The nitrogen-doped graphene-iron-based nanoparticles composite catalyst has excellent catalytic activity, and can be prepared in simple and economical manner. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of nitrogen-doped graphene-iron-based nanoparticles composite catalyst, which involves ultrasonically dispersing graphene oxide in deionized water, uniformly mixing to obtain 0.2-1 mg/ml aqueous graphene oxide solution and then placing in a three-necked flask, adding reducing agent to the aqueous graphene oxide solution and then magnetically stirring at 95 degrees C for 1 hour to obtain a reducing agent graphene oxide, filtering the reducing agent graphene oxide to obtain 0.15-0.5 mg/ml redox graphene, adding iron salt to the redox graphene in a mass ratio of 1:5-1:12 and then magnetically stirring for 12 hours to obtain a mixed solution, lyophilizing the mixed solution at -62 degrees C under ammonia gas and inert gas atmosphere, and heat treating at low temperature under vacuum.