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Ru-Co bimetallic nano supported catalyst for hydrolytic hydrogen release of ammonia borane and preparation method of Ru-Co bimetallic nano supported catalyst

A supported catalyst and bimetallic nanotechnology, applied in the field of nano-catalytic materials, can solve the problems of unsatisfactory catalytic effect and stability of the catalyst, and achieve the effects of low cost, easy availability of raw materials and cost reduction.

Inactive Publication Date: 2017-11-24
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At a room temperature of 25°C, the TOF value of its catalyzed hydrolysis of ammonia borane to hydrogen is 408.9molH 2 ×min -1 (mol×Ru) -1 , after five cycles, the activity of the catalyst is only 60% of the original, which shows that the catalytic effect and stability of the catalyst are not ideal

Method used

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  • Ru-Co bimetallic nano supported catalyst for hydrolytic hydrogen release of ammonia borane and preparation method of Ru-Co bimetallic nano supported catalyst
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  • Ru-Co bimetallic nano supported catalyst for hydrolytic hydrogen release of ammonia borane and preparation method of Ru-Co bimetallic nano supported catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1: Preparation of carrier MIL-110 and bimetallic nano-supported catalyst RuCo@MIL-110

[0027] Al(NO 3 ) 3 9H 2 O, trimethyl trimesate (Me 3 btc), NaOH, and deionized water in a molar ratio of 1:0.5:2.3:309, then mixed and stirred evenly, added to a 50mL stainless steel reactor with a polytetrafluoroethylene liner, and reacted at 210°C for 3h to obtain a suspension liquid. Then cool naturally, filter the suspension with suction, wash and dry to obtain a white solid. The obtained white solid was added into a 50 mL reaction kettle containing N,N dimethylformamide (DMF) solution, and reacted at 150° C. for 5 h. After the reaction, the solid was refluxed in deionized water at 100° C. for 12 hours, washed, and vacuum-dried at 80° C. to obtain a white metal-organic framework MIL-110 powder.

[0028]Weigh 50 mg of the above MIL-110 white powder and add it to 30 mL of deionized water, sonicate for 20 min, then add 0.025 mmol of ruthenium salt and 0.025 mmol of cob...

Embodiment 2

[0032] Example 2: Preparation of single metal supported catalysts Ru@MIL-110 and Co@MIL-110

[0033] Weigh 50 mg of MIL-110 prepared in Example 1 and 2.5 mL of RuCl with a concentration of 0.01 mol / L 3 solution, and the two were added to 30mL deionized water, and ultrasonicated for 10min to obtain a uniformly dispersed suspension. Then weigh 50.0mg reducing agent NaBH 4 solid and dissolved it in 10 mL deionized water, the NaBH 4 The aqueous solution was added dropwise to the above suspension, and stirring was continued for 3 h after the dropwise addition was completed. The resulting product was filtered, washed, and vacuum-dried overnight to obtain the Ru@MIL-110 catalyst.

[0034] Weigh 50 mg of MIL-110 prepared in Example 1 and 2.5 mL of Co(NO 3 ) 2 solution, and the two were added to 30mL deionized water, and ultrasonicated for 10min to obtain a uniformly dispersed suspension. Then weigh 50.0mg reducing agent NaBH 4 solid and dissolved it in 10 mL deionized water, th...

Embodiment 3

[0035] Example three: Preparation of RuCo nanoparticles

[0036] Measure 2.5mL of RuCl with a concentration of 0.01mol / L 3 solution and 2.5 mL of Co(NO 3 ) 2 The solution was added to 30 mL of deionized water, and a uniformly dispersed mixed solution was obtained after ultrasonication for 10 min. Then weigh 50.0mg reducing agent NaBH 4 solid and dissolved it in 10 mL deionized water, the NaBH 4 The aqueous solution was added dropwise to the above mixed solution, and stirring was continued for 3 h after the dropwise addition was completed. The resulting product was filtered, washed, and vacuum-dried overnight to obtain a RuCo nanoparticle catalyst.

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Abstract

The invention provides a Ru-Co bimetallic nano supported catalyst for hydrolytic hydrogen release of ammonia borane and a preparation method of the Ru-Co bimetallic nano supported catalyst. Ru and Co are taken as active components, a metal organic framework MIL-110 is taken as a carrier, NaBH4 is taken as a reductant, and precursors (ruthenium salt and cobalt salt) are reduced into RuCo to be supported on MIL-110 to obtain the Ru-Co bimetallic nano supported catalyst RuCo@MIL-110. RuCo alloy particles have the average grain size of about 2.3 nm. At the room temperature, the Ru-Co bimetallic nano supported catalyst shows high catalytic activity in catalysis of ammonia borane for hydrolytic hydrogen release, the reaction activation energy (Ea) is 31.7kJ mol<-1>, and the conversion frequency (TOF) is 533.2 mol H2 / min<-1> (mol / Ru)<-1>. The catalyst still maintains 79.0% of catalytic activity after being recycled for five times, and has extremely high toxin immunity and cyclic stability. Compared with mono-metallic supported and bimetallic unsupported catalysts, the Ru-Co bimetallic nano supported catalyst shows higher catalytic activity. Compared with a traditional noble metal catalyst, the Ru-Co bimetallic nano supported catalyst is low in cost, simple to prepare, easily accessible in raw material, suitable for industrial production and wide in application prospect.

Description

technical field [0001] The invention relates to a catalyst, in particular to a ruthenium-cobalt bimetallic nano-loaded catalyst for ammonia borane decomposing hydrogen and a preparation method thereof, belonging to the field of nano-catalytic materials. Background technique [0002] Due to the energy crisis and environmental degradation, scientists have developed new energy sources to replace fossil energy sources. Among many new energy sources, hydrogen energy is an ideal energy source, which has the characteristics of safety and environmental protection, wide range of sources, and wide application range. It is becoming more and more important in hydrogen fuel vehicles, power generation, lighting, and urban life. . Among many hydrogen storage materials, ammonia borane (NH 3 BH 3 , referred to as AB) is a hydrogen storage material with great application potential. The ammonia borane has a hydrogen content as high as 19.6wt%, is nontoxic, is stable at normal temperature, ...

Claims

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Application Information

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IPC IPC(8): B01J31/22B01J23/89B01J37/34B01J37/16B82Y30/00B82Y40/00C01B3/06
CPCB01J23/8913B01J31/1691B01J31/2213B01J37/16B01J37/343B01J2531/0244B01J2531/31B82Y30/00B82Y40/00C01B3/068Y02E60/36
Inventor 周立群宁红辉鲁迪陈锰寰李悦张树人刘红英王峥
Owner HUBEI UNIV
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