Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for producing ammonia by electrochemical reduction of nitric oxide based on monatomic nickel catalyst

A nitric oxide, nickel catalyst technology, applied in electrodes, electrolysis components, electrolysis process, etc., can solve the problems of poor yield and selectivity, and achieve high selectivity, high activity, and mild reaction conditions.

Active Publication Date: 2022-05-27
FUDAN UNIV
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few studies on the electrochemical reduction of nitric oxide, and noble metals such as platinum, palladium, silver, etc. are mainly used as catalysts, and the yield and selectivity are poor.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for producing ammonia by electrochemical reduction of nitric oxide based on monatomic nickel catalyst
  • Method for producing ammonia by electrochemical reduction of nitric oxide based on monatomic nickel catalyst
  • Method for producing ammonia by electrochemical reduction of nitric oxide based on monatomic nickel catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] This embodiment provides a method for producing ammonia by electrochemically reducing nitric oxide based on a single-atom nickel catalyst.

[0063] (1) The nickel-centered porphyrin monomer (chemical structural formula is shown in formula (I), the following is the same) and graphene are polymerized to form a nickel-centered covalent organic framework (see the high-resolution transmission electron microscope image for figure 1 a, element distribution see figure 1 b, see the schematic diagram of the structure figure 1 c), wherein the ratio of nickel metal center porphyrin monomer to graphene is 1:3; take 3 mg of nickel center covalent organic framework, add 950 μL of isopropanol solution, and then add 50 μL of 15% perfluoro Sulfonic acid membrane solution, sonicated for 30 minutes to make it evenly mixed, then drop-coated it on 3cm 2 on double-sided hydrophobic carbon paper. The electrolyte was collected after 30 minutes of reaction.

[0064]

[0065] (2) with silv...

Embodiment 2

[0069] This embodiment provides a method for producing ammonia by electrochemically reducing nitric oxide based on a single-atom nickel catalyst.

[0070] (1) Polymerize the nickel-centered porphyrin monomer and graphene into a nickel-centered covalent organic framework, wherein the ratio of the nickel-metal-centered porphyrin monomer and graphene is 1:1; take 3 mg of the Ni-centered covalent organic framework, add 950 μL of isopropanol solution, then 50 μL of 15% perfluorosulfonic acid membrane solution was added to it, sonicated for 30 minutes to make it evenly mixed, and then dripped on 3 cm 2 on double-sided hydrophobic carbon paper. The electrolyte was collected after 30 minutes of reaction.

[0071] (2) with silver / silver chloride as reference electrode, platinum sheet as counter electrode, mobile phase electrolytic cell as reaction cell (reaction device such as figure 2 shown).

[0072] (3) The NaOH aqueous solution with the concentration of 5M is used as an absorpt...

Embodiment 3

[0075] This embodiment provides a method for producing ammonia by electrochemically reducing nitric oxide based on a single-atom nickel catalyst.

[0076] (1) Polymerize the nickel-centered porphyrin monomer and graphene to form a nickel-centered covalent organic framework, wherein the ratio of the nickel-metal-centered porphyrin monomer to graphene is 1:5; take 3 mg of the Ni-centered covalent organic framework, add 950 μL of isopropanol solution, then 50 μL of 15% perfluorosulfonic acid membrane solution was added to it, sonicated for 30 minutes to make it evenly mixed, and then dripped on 3 cm 2 on double-sided hydrophobic carbon paper. The electrolyte was collected after 30 minutes of reaction.

[0077] (2) with silver / silver chloride as reference electrode, platinum sheet as counter electrode, mobile phase electrolytic cell as reaction cell (reaction device such as figure 2 shown).

[0078] (3) The NaOH aqueous solution with the concentration of 5M is used as an absor...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to the technical field of artificial nitrogen fixation, in particular to a method for producing ammonia by electrochemical reduction of nitric oxide based on a monatomic nickel catalyst. The preparation method comprises the following steps: firstly, polymerizing a nickel-center porphyrin monomer and graphene into a nickel-center covalent organic framework; then loading on carbon paper; finally, taking the carbon paper loaded with the nickel central covalent organic framework as a working electrode, taking silver / silver chloride as a reference electrode, and taking a platinum sheet as a counter electrode; nitric oxide is introduced after post-treatment, overpotential is applied to the working electrode, ammonia is obtained through reaction, and the catalytic yield of ammonia reaches 700 micromole / hour / milligram of catalyst or above. The invention provides a new artificial nitrogen fixation strategy, a common atmospheric pollutant nitric oxide is converted into ammonia with high economic benefits through a green electrochemical means, and high selectivity and high activity of the conversion are realized through a covalent organic framework with dispersed nickel.

Description

technical field [0001] The invention relates to the technical field of artificial nitrogen fixation, in particular to a method for producing ammonia by electrochemically reducing nitric oxide based on a single-atom nickel catalyst. Background technique [0002] Ammonia is one of the world's most produced chemical products, an ideal energy storage carrier, and plays an important role in the global economy. The only synthetic nitrogen fixation method currently available on an industrial scale is gas-phase synthesis proposed by German scientists Haber and Bosch in the early twentieth century. The reaction conditions are harsh, carried out at high temperature and pressure, and the conversion rate is extremely low (10-15%). Therefore, the synthesis of ammonia at room temperature and pressure has always been the goal of scientists. The introduction of electric energy into synthetic ammonia can realize the green synthesis of ammonia, break through the thermodynamic equilibrium li...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/085C25B11/065C25B1/50C25B1/27
CPCC25B11/085C25B11/065C25B1/27C25B1/50Y02E60/36
Inventor 张黎明赵斯文谷霍亮
Owner FUDAN UNIV