• 专利标题:   Single-atom catalyst useful in preparing microelectrode for measuring concentration of hydrogen peroxide in brain comprises graphitic carbon nitride as carrier and single copper atom loaded on carrier as active component, where graphitic carbon nitride comprises mesoporous graphitic-carbon nitride.
  • 专利号:   CN113786853-A, CN113786853-B
  • 发明人:   YU P, MA W, GAO X, MAO L
  • 专利权人:   CHINESE ACAD SCI CHEM INST
  • 国际专利分类:   B01J023/72, B01J027/24, B01J035/10, G01N027/30
  • 专利详细信息:   CN113786853-A 14 Dec 2021 B01J-027/24 202223 Chinese
  • 申请详细信息:   CN113786853-A CN10903108 06 Aug 2021
  • 优先权号:   CN10903108

▎ 摘  要

NOVELTY - Single-atom catalyst comprises graphitic carbon nitride as a carrier, and a single copper atom loaded on the carrier as an active component, where the atomic percentage content of the active component in the single-atom catalyst is 0.07-0.2%, and graphitic carbon nitride comprises mesoporous graphitic (mpg)-carbon nitride. USE - The catalyst is useful in preparing the microelectrode for measuring the concentration of hydrogen peroxide in the brain (all claimed). ADVANTAGE - The catalyst: has large specific surface area, low content of active components, high selectivity to hydrogen peroxide and good stability. The microelectrode: adopts a single-atom catalyst with high selectivity as an electrocatalyst; and realizes the accurate detection of hydrogen peroxide on the electrode without interference from oxygen and most other substances in the brain. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: preparing the single-atom catalyst, comprising preparing graphite phase carbon nitride dispersion, where the graphite phase carbon nitride comprises mpg-carbon nitride, adding the copper salt solution to the graphite phase carbon nitride dispersion, stirring, separating and drying to obtain a catalyst precursor, calcining the catalyst precursor in a mixed atmosphere of hydrogen and an inert gas or calcining in a hydrogen atmosphere, and cooling; a microelectrode, comprising an electrode, a complex layer coated on the surface of the electrode, and a polymer layer for covering the complex layer, where complex layer comprises a single-atom catalyst or a single-atom catalyst and a carbon material, and the single-atom catalyst prepared by above mentioned method; and preparing the microelectrode, comprising dispersing the single-atom catalyst and optional carbon material in a solvent to obtain a dispersion, coating electrode tips with the dispersion, drying, immersing the dried electrode tip in the polymer solution, taking out and drying.