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Method for formate dehydrogenation under catalysis of supported Ag-Pd/C3N4 nano-catalyst

A nano-catalyst, C3N4 technology, used in physical/chemical process catalysts, chemical instruments and methods, hydrogen and other directions, can solve the problems of limited hydrogen storage, storage and transportation difficulties, low density, etc., and achieve high activity and selectivity.

Active Publication Date: 2016-01-06
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Hydrogen is usually a gas with a low density, which makes its storage and transportation difficult. At present, high-pressure compression hydrogen storage is usually used in large-scale industries. This has high requirements for the material of hydrogen storage materials, and the hydrogen storage capacity is limited. And there is a risk of hydrogen leakage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Catalyst preparation process

[0020] 0.02mmolAgNO 3 And 0.002mmolK 2 PdCl 4 Dissolve in 10mL distilled water, stir for a while in an ice bath at 0℃, and then add 0.01mmolC 3 N 4 Add to the above solution, after fully stirring, add dropwise 0.1mol / L sodium borohydride solution to reduce for 1h, filter and dry in a drying box at 60℃ for 24h, the catalyst is recorded as Ag-Pd 0.1 / 0.5C 3 N 4 , Keep tightly closed.

[0021] Dehydrogenation process

[0022] Load 50mg of the above catalyst into the reactor, then place the reactor in an oil bath to control the reaction temperature to 40°C, add dropwise 2ml of a mixture of sodium formate and formic acid with a molar ratio of 1:1 to it, collect the reaction gas, and after the reaction The selectivity of hydrogen is 100% and the activity is 105h -1 .

Embodiment 2

[0024] Catalyst preparation process

[0025] 0.02mmolAgNO 3 And 0.2mmolK 2 PdCl 4 Dissolve in 10mL distilled water, stir for a while in an ice bath at 0℃, then add 0.1mmolC 3 N 4 Add to the above solution, after fully stirring, add dropwise 0.5mol / L sodium borohydride solution to reduce for 1h, filter and dry in a dry box at 150℃ for 12h, the catalyst is recorded as Ag-Pd 10 / 5C 3 N 4 , Keep tightly closed.

[0026] Dehydrogenation process

[0027] Load 50mg of the above catalyst into the reactor, then place the reactor in an oil bath to control the reaction temperature to 100°C, add dropwise 2ml of a mixture of sodium formate and formic acid with a molar ratio of 1:5, collect the reaction gas, and after the reaction The selectivity of hydrogen is 100% and the activity is 155h -1 .

Embodiment 3

[0029] Catalyst preparation process

[0030] 0.02mmolAgNO 3 And 0.2mmolK 2 PdCl 4 Dissolve in 10mL distilled water, stir for a while in an ice bath at 0℃, then add 0.1mmolC 3 N 4 Add to the above solution, after fully stirring, add dropwise 0.5mol / L sodium borohydride solution to reduce for 1h, filter and dry in a drying box at 60℃ for 24h, the catalyst is recorded as Ag-Pd 0.1 / 0.5C 3 N 4 , Keep tightly closed.

[0031] Dehydrogenation process

[0032] Load 50mg of the above catalyst into a tubular reactor, then place the tubular reactor in an oil bath to control the reaction temperature to 60°C, add dropwise 2ml of a mixture of sodium formate and formic acid with a molar ratio of 1:1 to it, and collect the reaction Gas, the selectivity of hydrogen measured after the reaction is 100%, and the activity is 125h -1 .

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Abstract

The invention discloses a method for formate dehydrogenation under catalysis of a supported Ag-Pd / C3N4 nano-catalyst and belongs to the technical fields of chemistry and chemical engineering. The well-prepared supported Ag-Pd / C3N4 nano-catalyst is put in a reactor, the reactor is put in an oil bath and heated to a certain temperature, a mixed solution of formic acid and sodium formate is added to the reactor for a reaction, and generated hydrogen is collected with a drainage method. The supported Ag-Pd / C3N4 nano-catalyst is prepared as follows: a solution is prepared from Ag and Pd in a certain mole ratio, a carrier C3N4 is added to the solution, a reducer is added to the mixed solution, and filtration and drying are performed. Compared with conventional supported catalysts, the high-activity and high-selectivity supported Ag-Pd / C3N4 nano-catalyst used for formate dehydrogenation to prepare hydrogen can be prepared by adjusting the content of Ag, Pd and C3N4.

Description

Technical field [0001] The invention belongs to the technical field of chemistry and chemical engineering, and specifically relates to a loaded Ag-Pd / C 3 N 4 Nano catalyst catalyzes the method of formic acid dehydrogenation. Background technique [0002] With the current energy crisis and environmental problems becoming more and more serious, it is urgent to find new energy alternatives to traditional fossil energy. Hydrogen energy is considered to be the new energy to promote the energy revolution in the 21st century. It has the advantages of wide sources, cleanliness, and high energy density, especially The current large-scale hydrogen production technology has developed to be relatively mature, which provides a basis for the wide application of hydrogen energy. [0003] Hydrogen is usually a gas, and its density is low, which determines that its storage and transportation are more difficult. At present, high-pressure compressed hydrogen storage is usually used in large-scale ind...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/22B01J27/24
Inventor 万超许立信章健李杰洪兵郑明东崔平
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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