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Preparation method of high-efficiency Ru/Co catalyst for catalyzing hydrolysis of NaBH4 to produce hydrogen

A technology for hydrogen production and catalysts by hydrolysis, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve problems such as catalytic performance inhibition, and achieve low cost and stability The effect of high stability and simple and convenient preparation method

Inactive Publication Date: 2020-02-21
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, although Ru-based catalysts are effective against NaBH in neutral solution 4 Has high catalytic performance, but in alkaline solution, its catalytic performance is severely inhibited

Method used

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  • Preparation method of high-efficiency Ru/Co catalyst for catalyzing hydrolysis of NaBH4 to produce hydrogen
  • Preparation method of high-efficiency Ru/Co catalyst for catalyzing hydrolysis of NaBH4 to produce hydrogen
  • Preparation method of high-efficiency Ru/Co catalyst for catalyzing hydrolysis of NaBH4 to produce hydrogen

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh 5g of TiO 2 Powder and join in the 50mL round-bottomed flask, put into magneton, the round-bottomed flask is transferred on the magnetic stirring table; Then weigh 0.026g of ruthenium chloride trihydrate (RuCl 3 ·3H 2 O) and 0.223g of cobalt nitrate hexahydrate (Co(NO 3 ) 2 ·6H 2 O) into a 20mL glass bottle, and in the glass bottle, add the mixed acid (V 浓硝酸 :V 浓盐酸 =3:1) 10g was made into a metal salt mixed solution. After stirring well, the metal salt mixed solution was added dropwise to the TiO-containing 2 In the powder flask, mix well and continue to stir for 2 hours; after 2 hours, transfer the 50mL round bottom flask to a constant temperature oil bath, continue to stir and evaporate to dryness at an oil temperature of 140°C.

[0027] The evaporated sample was taken out and ground into powder in an agate mortar, then transferred to a 50mL round-bottomed flask, after adding 20mL deionized water and stirring evenly, the mass fraction was 10wt% ammonia bo...

Embodiment 2

[0029] Weigh 5g of ZrO 2 Powder and join in the 50mL round-bottomed flask, put into magneton, the round-bottomed flask is transferred on the magnetic stirring table; Then take by weighing 0.16g of ruthenium nitrate (Ru(NO 3 ) 3 ), 1.82g cobalt chloride hexahydrate (CoCl 2 ·6H 2 O) In a 20mL small glass bottle, add the mixed acid (V 浓硝酸 :V 浓盐酸 =1:1) 10g was made into metal cation mixed solution. After stirring evenly, the metal salt mixed solution was added dropwise to the 2 In the powder flask, mix well and continue to stir for 2 hours; then transfer the 50mL round bottom flask to a constant temperature oil bath, continue to stir and evaporate to dryness at an oil temperature of 140°C.

[0030] The evaporated sample was taken out and ground into powder, then transferred to a 50mL round-bottomed flask, and after adding 20mL deionized water and stirring evenly, the preparation mass fraction was 5wt% ammonia borane (NH 3 ·BH 3 ) solution absorbs 2g dropwise and joins in t...

Embodiment 3

[0032] Weigh 5g of CeO 2 Powder and join in the 50mL round-bottomed flask, put into magnetron, the round-bottomed flask is transferred on the magnetic stirring table; Then weigh 0.07g of ruthenium chloride trihydrate (RuCl 3 ·3H 2 O), 1.0g cobalt chloride hexahydrate (CoCl 2 ·6H 2 O) In a 20mL small glass bottle, add the mixed acid (V 浓硝酸 :V 浓盐酸=1:2) 10g was made into a metal salt mixed solution. After stirring evenly, the metal salt mixed solution was added dropwise to the CeO 2 In the powder, mix evenly and continue to stir for 2 hours; then transfer the 50mL round bottom flask to a constant temperature oil bath, continue to stir and evaporate to dryness at an oil temperature of 140°C.

[0033] The evaporated sample was taken out and ground into powder, then transferred to a 50mL round-bottomed flask, and after adding 20mL deionized water and stirring evenly, the preparation mass fraction was 7.5wt% ammonia borane (NH 3 ·BH 3 ) solution 2g and dropwise added in the f...

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Abstract

Belonging to the field of composite catalysts, the invention relates to a preparation method of a high-efficiency Ru / Co catalyst for catalyzing hydrolysis of NaBH4 to produce hydrogen. The catalyst isprepared by taking metal oxide powder as a substrate material and dispersing ruthenium and cobalt on the substrate surface by impregnation method. The high dispersion of Ru on the metal oxide improves the catalytic efficiency of Ru in the Ru / Co catalyst. The prepared Ru / Co catalyst shows very high catalytic activity in the reaction of catalyzing hydrolysis of NaBH4 to produce hydrogen under a catalytic alkaline condition. Meanwhile, the catalyst also has the advantages of low cost, good stability, long service life, convenient use and the like.

Description

technical field [0001] The invention belongs to the field of composite heterogeneous catalysts and relates to a catalytic NaBH 4 Preparation method of high-efficiency Ru / Co catalyst for hydrogen production by hydrolysis. Background technique [0002] Sodium borohydride (NaBH 4 ) is an important hydrogen storage material, which has significant advantages such as stable chemical properties, high hydrogen storage, controllable hydrolysis and high purity of hydrogen produced. per 1 g NaBH 4 The hydrolysis of can produce 0.21g hydrogen. However, in the absence of catalyst, NaBH 4 The autohydrolysis reaction rate is very slow. In addition, in order to increase its stability in solution, it is usually necessary to add NaBH 4 Alkali is added to the solution, under such conditions, its autohydrolysis hardly occurs. Therefore, the development of suitable catalysts to promote NaBH 4 Hydrolysis is very necessary. [0003] Many transition metals (such as palladium (Pd), rhodium ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89C01B3/06
CPCB01J23/8913B01J23/894C01B3/065C01B2203/1052C01B2203/1047Y02E60/36
Inventor 董华张嘉鹏杨丽菁
Owner CHENGDU UNIVERSITY OF TECHNOLOGY