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Controllable preparation method and application of supported non-noble metal diatomic catalyst

A non-precious metal, diatomic technology, applied in the field of catalysis, can solve the problems of high cost of precious metal elements, restricting the scale and scope of application, and achieve the effect of simple and feasible operation.

Active Publication Date: 2019-11-22
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the high cost of precious metal elements, its application scale and application range are restricted.

Method used

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  • Controllable preparation method and application of supported non-noble metal diatomic catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) After heating 20mL of deionized water to 40°C, add 0.36g of boric acid, 0.32g of sodium citrate, 0.02g of glycine, 0.26g of nickel sulfate, and 0.23g of cobalt sulfate, and stir thoroughly. After the solid matter is completely dissolved, Stop heating, cool to room temperature naturally, make solution A;

[0021] (2) The pH value of solution A is adjusted to 12 by sodium hydroxide solution to prepare solution B;

[0022] (3) After heating solution B to 60°C, add 0.35 g of g-C to solution B 3 N 4 powder, after stirring at 60°C for 30 minutes, solution C was prepared;

[0023] (4) Add 0.56g of sodium hypophosphite into 20mL of deionized water, and stir to prepare solution D after the solid matter is completely dissolved;

[0024] (5) Pour solution D into solution C, react at 60°C for 50 minutes, filter and put the solid matter in an oven at 50°C for 4 hours to obtain g-C 3 N 4 Supported NiCo two-atom catalysts.

Embodiment 2

[0026] (1) After heating 100mL of deionized water to 50°C, add 1.25g of boric acid, 1.5g of sodium citrate, 0.11g of glycine, 1.58g of nickel chloride, and 1.2g of cobalt nitrate, and stir thoroughly until the solid matter is completely dissolved , stop heating, and naturally cool to room temperature to prepare solution A;

[0027] (2) The pH value of solution A is adjusted to 11 by sodium hydroxide solution to prepare solution B;

[0028] (3) After heating solution B to 50°C, add 1.8 g of g-C to solution B 3 N 4 powder, after stirring at 50°C for 40 minutes, solution C was prepared;

[0029] (4) 1.5g of sodium hypophosphite and 1.5g of potassium hypophosphite were added to 100mL of deionized water, and stirred to prepare solution D after the solid matter was completely dissolved;

[0030] (5) Pour solution D into solution C, react at 50°C for 1.5h, filter and put the solid matter in an oven at 50°C for 6h to obtain g-C 3 N 4 Supported NiCo two-atom catalysts.

Embodiment 3

[0032] (1) After heating 150mL of deionized water to 60°C, add 1.75g ​​of boric acid, 2.2g of sodium citrate, 0.18g of glycine, 1.89g of nickel nitrate, and 2.2g of cobalt chloride, and stir thoroughly until the solid matter is completely dissolved , stop heating, and naturally cool to room temperature to prepare solution A;

[0033] (2) The pH value of solution A is adjusted to 10 by sodium hydroxide solution to prepare solution B;

[0034] (3) After heating solution B to 65°C, add 2.2 g of g-C to solution B 3 N 4 powder, after stirring at 65°C for 50 minutes, solution C was prepared;

[0035] (4) Add 3.8g of sodium hypophosphite into 50mL of deionized water, stir until the solid matter is completely dissolved to prepare solution D;

[0036] (5) Pour solution D into solution C, react at 65°C for 45 minutes, filter and put the solid matter in an oven at 50°C for 8 hours to obtain g-C 3 N 4 Supported NiCo two-atom catalysts.

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Abstract

The invention discloses a controllable preparation method of a supported non-noble metal diatomic catalyst. Nickel ions and cobalt ions in the solution are reduced into metal elementary substances bytaking hypophosphite as a reducing agent, and the metal elementary substances are loaded on the surface of the g-C3N4 carrier. By changing process parameters, the loading capacity of the non-noble metal diatoms deposited on the surface of the carrier can be regulated and controlled within the range of 0.01-5.5 wt%, and catalysts with different catalytic properties can be prepared by controlling the element proportion of nickel and cobalt so as to meet the requirements of different catalytic systems. Due to the synergistic effect of nickel atoms and cobalt atoms, the catalyst has catalytic activity and selectivity different from those of a unitary monatomic catalyst. Compared with the prior art, the preparation method has the advantages that controllable growth of the non-noble metal diatomsupported catalyst can be realized, and the prepared catalyst is excellent in performance, low in cost, simple and feasible to operate and suitable for large-scale production.

Description

technical field [0001] The invention belongs to the technical field of catalysis, and relates to a controllable preparation method of a non-noble metal diatom-supported catalyst and its application in selective catalysis, catalytic hydrogen evolution, and photocatalytic degradation. Background technique [0002] (1) The electronic configuration of the active center of the catalyst is an important factor affecting the catalytic activity. Almost all noble metals can be used as catalysts, such as common platinum, rhodium, ruthenium, etc. This is because such catalysts contain vacant d-electron orbitals and unpaired d-electrons. Through the contact between the catalyst and the reactant molecules, various characteristic chemical adsorption bonds are formed on the vacant d orbitals of these catalysts to achieve the purpose of molecular activation, thereby reducing the activation energy of complex reactions to achieve the purpose of catalysis. Because noble metal catalysts have g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24
CPCB01J27/24B01J35/39
Inventor 谢娟柏鹏辉王虎王陈杰许家科
Owner SOUTHWEST PETROLEUM UNIV
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