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Iridium monatomic catalyst and preparation method and application thereof

A catalyst and iridium atom technology, applied in the field of glucose sensors, can solve the problems of low sensitivity of glucose detection and poor stability of the energy supply system, achieve high-efficiency oxygen reduction activity, and improve the effect of oxygen reduction activity

Active Publication Date: 2021-06-04
HUAZHONG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide an iridium single-atom catalyst and its preparation method and application to solve the problems of poor stability of the energy supply system and low sensitivity of glucose detection in the self-powered sensor system in the prior art

Method used

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  • Iridium monatomic catalyst and preparation method and application thereof
  • Iridium monatomic catalyst and preparation method and application thereof
  • Iridium monatomic catalyst and preparation method and application thereof

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preparation example Construction

[0049] The first is the preparation of the mixture: mixing glucosamine hydrochloride, zinc chloride and iridium trichloride in the silica suspension, stirring and then freeze-drying to obtain the mixture;

[0050] In this step, the purpose of stirring is to make the material mix uniformly, and the purpose of freeze-drying is to keep the material with a larger pore size, and make basic preparations for the subsequent obtaining of a carbide with a large specific surface area.

[0051] In this step, the mass ratio of glucosamine hydrochloride, zinc chloride, iridium trichloride and silicon dioxide is 2:0.285:0.005:2. In this embodiment, the purpose of using this ratio is to form an atomically dispersed single-atom structure system, and if the iridium content is too high, it will lead to the formation of nanoparticles.

[0052] Second, carbonization: in an inert gas environment, the mixture is carbonized to obtain a carbonized body; specifically, high-temperature carbonization is ...

Embodiment

[0060] The following describes the specific preparation process and the like.

[0061] Refer to attached figure 1 Shown, in the present embodiment, the glucosamine hydrochloride of 2g and the zinc chloride of 0.285g and the iridium trichloride of 5mg are mixed in the silicon dioxide (mass fraction is 40%) suspension of 20mL 2g, stir After one hour, the solution was lyophilized. It was then carbonized at 900 °C for 2 h under inert gas. Finally, the sample was etched with hydrofluoric acid (10% by mass) at room temperature for 12 h to obtain an iridium single-atom catalyst (hereinafter referred to as SA-Ir / NC), where SA is the abbreviation of single atom.

[0062] Next, through the characterization and characteristics of the entire catalyst, the performance structure of the catalyst will be analyzed in detail.

[0063] Refer to attached figure 2 As shown, SA-Ir / NC inherits the nanostructure of the silica template by transmission electron microscopy (TEM) images, with an ave...

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Abstract

The invention discloses an iridium monatomic catalyst and a preparation method and application thereof, the catalyst is a nanostructure system, carbon atoms, nitrogen atoms and iridium atoms are distributed in the nanostructure system, in the nanostructure system, the carbon atoms form a carrier structure, and the iridium atoms and the nitrogen atoms are embedded in the carrier structure. After the prepared catalyst is applied, the problems that an energy supply system in a self-energy-supply sensing system is poor in stability and low in glucose detection sensitivity can be solved.

Description

technical field [0001] The invention belongs to the technical field of glucose sensors, and in particular relates to the preparation of a highly sensitive self-powered glucose sensor, in particular to a method for preparing an iridium single-atom material and a neutral zinc-air battery to assemble a self-powered sensor, wherein the catalyst is characterized by IrN 5 coordination environment. Background technique [0002] Self-powered sensors are composed of sensing, communication, control and response components. In addition to sensing, transmission and data processing components, energy harvesting and storage are important components of the system. Potential energy sources include solar energy, thermal energy, wind energy, chemical, mechanical, biomass, etc. Harvesting solar energy using solar cells has been widely used in practical applications, but the strong dependence on weather conditions greatly reduces the feasibility of harvesting solar energy as a power source fo...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J23/46G01N27/30H01M4/90H01M12/08C12Q1/26C12Q1/54
CPCB01J27/24B01J23/468H01M4/9041H01M12/08H01M4/9083G01N27/308C12Q1/006C12Q1/26C12Q1/54G01N2333/904B01J35/33
Inventor 朱成周顾文玲罗昕
Owner HUAZHONG NORMAL UNIV
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