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Amino-functionalized graphene oxide immobilized non-noble metal nanocatalyst and preparation method thereof

A nano-catalyst and amine-based functional technology are applied in the field of amine-based functionalized graphene oxide immobilized non-precious metal nano-catalyst and its preparation, which can solve problems such as expensive application development, achieve good electronic and structural synergy, and be easy to control. , the effect of reducing the production cost

Inactive Publication Date: 2020-02-18
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing research on catalysts for water-interpreted hydrogen reactions mainly focuses on noble metals such as Pt, Pd, and Rh. Although the excellent catalytic ability of noble metal-based catalysts has been confirmed, their high price is still the main obstacle restricting their application development.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Step 1: At room temperature, add 40mg of graphene oxide to 50ml of water, ultrasonic for 30min; Slowly add the diamine solution into the graphene oxide dispersion, stir vigorously, and react for 40 hours to graft p-phenylenediamine onto the surface of graphene oxide to obtain a black-gray DA-GO suspension;

[0032] Step 2: Centrifuge the suspension obtained in Step 1 at 7500 rpm, decant out the black-gray solid, wash it with water for 3 times, take out the DA-GO black-gray powder, dry it in vacuum at 40°C for 5 hours, and store it in a vacuum desiccator;

[0033] Step 3: At room temperature, take 50ml of 0.5wt% polyvinylpyrrolidone aqueous solution, add 4.2mmol of nickel acetate and 0.8mmol of copper chloride respectively, ultrasonically disperse for 10min, then add 50 mg of DA-GO powder obtained in step 2, and continue to sonicate Treat for 2h to obtain the precursor suspension of DA-GO and metal;

[0034] Step 4: Transfer the DA-GO metal precursor suspension obtained...

Embodiment 2

[0038] Step 1: At room temperature, add 60mg of graphene oxide into 50ml of water, ultrasonic for 30min; dissolve 50mmol of ethylenediamine into 50ml of acetone / ether (1:1 volume ratio) mixed solvent, sonicate until completely dissolved; Slowly add the solution into the graphene oxide dispersion, stir vigorously, and react for 50 hours to graft ethylenediamine onto the surface of graphene oxide to obtain a black-gray DA-GO suspension;

[0039] Step 2: Centrifuge the suspension obtained in Step 1 at 10,000 rpm, decant out the black-gray solid, wash it with water for 5 times, take out the DA-GO black-gray powder, dry it in vacuum at 60°C for 8 hours, and store it in a vacuum desiccator;

[0040] Step 3: At room temperature, take 50ml of 1.5wt% polyvinylpyrrolidone aqueous solution, add 3.1mmol of nickel sulfate and 1.9mmol of copper nitrate respectively, ultrasonically disperse for 30min, then add 50 mg of DA-GO powder obtained in step 2, and continue ultrasonic treatment 6h, ob...

Embodiment 3

[0045] Step 1: At room temperature, add 50mg of graphene oxide into 50ml of water, sonicate for 30min; slowly add 1,2-propylenediamine solution into the graphene oxide dispersion, vigorously stir and react for 45 hours, and graft 1,2-propylenediamine onto the surface of graphene oxide to obtain black-gray DA- GO suspension;

[0046] Step 2: Centrifuge the suspension obtained in Step 1 at 8700rpm, decant out the black-gray solid, wash it with water 4 times, take out the DA-GO black-gray powder, dry it in vacuum at 50°C for 6.5h, and store it in a vacuum desiccator ;

[0047] Step 3: At room temperature, take 50ml of 1.0wt% polyvinylpyrrolidone aqueous solution, add 3.6mmol of nickel chloride and 1.4mmol of copper sulfate respectively, ultrasonically disperse for 20min, then add 50 mg of DA-GO micropowder obtained in step 2, and continue to sonicate Treat for 4h to obtain the precursor suspension of DA-GO and metal;

[0048] Step 4: Move the DA-GO metal precursor suspension o...

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Abstract

The invention relates to an amino functionalized graphene oxide immobilized non-noble metal nano catalyst and a preparation method thereof. Active ingredients of the catalyst include nickel and copper; a carrier is amino functionalized graphene oxide; the composition of the catalyst can be written as Ni-Cu / DA-GO, for short; the molar ratio of Ni to Cu is 1 to (0.2 to 0.6), and Ni and Cu form homogeneous-phase alloy particles with particle size of 10-80nm. According to the invention, by adopting ordered process design of surface grafting, coordination bonding, controlled reduction, adsorption loading and the like, firm combination is generated between the two metals and the carrier graphene oxide, overall stability of the catalyst can be ensured well, and the active ingredients are not lostor dropped easily; furthermore, since the metal particles form a scientific and reasonable homogeneous-phase structure, perfect electronic and structural cooperativity can be promoted between the metals and between the metals and the carrier, and thus the catalytic efficiency of the catalyst is effectively improved.

Description

technical field [0001] The invention relates to the technical field of catalyst preparation, in particular to an amino functionalized graphene oxide immobilized non-noble metal nano catalyst and a preparation method thereof. Background technique [0002] Hydrogen energy has significant characteristics such as high energy density, high calorific value, renewable, and no secondary pollution. It has become a future efficient and clean energy that is widely concerned by all sectors of society. The key constraint to the large-scale development and application of hydrogen energy is to seek safe, efficient and controllable hydrogen storage materials. Research in recent years has found that chemical hydrogen storage is the best way to solve the hydrogen source applicable to dynamic devices (such as automobiles, etc.). Among them, ammonia borane (Ammonia Borane, referred to as AB, molecular formula NH 3 BH 3 ) is a hydrogen storage compound with the highest hydrogen content (19.59...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/755C01B3/04
CPCY02E60/36
Inventor 张军王杨董亚娜朱一明杜西刚米刚段永华宋帮才
Owner HENAN UNIV OF SCI & TECH
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