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Catalyst for hydrogen production by catalyzing and hydrolyzing borohydride and preparation method thereof

A borohydride and catalytic hydrolysis technology, which is applied in the fields of hydrogen production, hydrogen storage technology and materials, can solve the problems of difficult recovery of hydrolysis by-products, difficult control of catalytic hydrolysis reaction, catalyst loss, etc., so as to solve the problem of catalyst loss and realize instant control. , The effect of high preparation efficiency

Inactive Publication Date: 2009-01-21
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a practical borohydride hydrolysis hydrogen production catalyst and its preparation method, to solve the problem of catalyst loss caused by direct application of powder catalyst in catalytic hydrolysis solid-liquid reaction system, difficulty in controlling catalytic hydrolysis reaction and hydrolysis by-products difficult to recycle

Method used

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  • Catalyst for hydrogen production by catalyzing and hydrolyzing borohydride and preparation method thereof
  • Catalyst for hydrogen production by catalyzing and hydrolyzing borohydride and preparation method thereof
  • Catalyst for hydrogen production by catalyzing and hydrolyzing borohydride and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Example 1 Preparation and Catalytic Performance / Structural Characterization of Nickel Foam Supported Amorphous Co-B Alloy Catalyst

[0042] With nickel foam as the carrier, its main physical properties are: thickness 1.80mm, surface density 575g / m 2 , with a continuous through hole structure, the hole diameter is 0.20 ~ 0.50mm. Before electroless plating, nickel foam was cleaned and degreased by ultrasonic vibration in ethanol for 10 minutes, and then immersed in 10wt.% hydrochloric acid solution for activation for 1 minute. All chemical reagents used were of analytical grade without any treatment.

[0043] Improved electroless plating preparation of amorphous Co-B alloy catalyst formula:

[0044] Solution A: Cobalt Chloride (CoCl 2 ·6H 2 O) 50g / l, ammonium chloride (NH 4 Cl) 80g / l, ammonia water [NH 3 ·H 2 O (25 wt.%)] 45ml / l.

[0045] Solution B: Sodium borohydride (NaBH 4 ) 40g / l, sodium hydroxide (NaOH) 10g / l.

[0046] Operating conditions: pH value 14, re...

Embodiment 2

[0056] Embodiment 2 foamed nickel carrier electroless plating Co-Mn-B alloy is used for NaBH 4 Hydrogen production by catalytic hydrolysis

[0057] The nickel foam carrier used and the pretreatment process are the same as in Example 1.

[0058] Improve the formula of chemical plating Co-Mn-B:

[0059] Solution A: Cobalt Chloride (CoCl 2 ·6H 2 O) 60g / l, manganese chloride (MnCl 2 4H 2 O) 60g / l, ammonium chloride (NH 4 Cl) 80g / l, ethylenediamine (H 2 NCH 2 CH 2 NH 2 ) 15ml / l.

[0060] Solution B: Sodium borohydride (NaBH 4 ) 40g / l, sodium hydroxide (NaOH) 10g / l.

[0061] Preparation of Co-Mn-B / nickel foam catalyst:

[0062] The preparation process of Co-Mn-B / nickel foam catalyst is identical with embodiment 1, and prepared Co-Mn-B ternary alloy coating, through ICP chemical analysis, the content of Mn is 25wt.% in the coating, and the content of B is 9wt.%, the appearance of the coating is black, and the surface is rough and porous, with an average pore size of 2 μ...

Embodiment 3

[0065] Embodiment 3 foamed nickel carrier electroless plating Co-P alloy is used for NaBH 4 Hydrogen production by catalytic hydrolysis

[0066] The nickel foam carrier used and the pretreatment process are the same as in Example 1.

[0067] Improved formulation of electroless Co-P plating:

[0068] Solution A: Cobalt Acetate (Co(AC) 2 4H 2 O) 70g / l, sodium citrate (Na 3 C 6 h 5 o 7 2H 2 O) 60g / l, ammonium chloride (NH 4 Cl) 80g / l, ammonia water [NH 3 ·H 2 O (25 wt.%)] 45ml / l.

[0069] Solution B: sodium hypophosphite (NaH 2 PO 2 ·H 2 O) 70g / l, sodium hydroxide (NaOH) 10g / l.

[0070] Preparation of Co-P / foam nickel catalyst:

[0071] Put the pretreated foamed nickel carrier at 85°C in an equal volume of a mixture of solution A and solution B for improved electroless Co-P plating, and after 1 minute, add 1ml of 1M NaBH dropwise 4 or 1ml 0.02M PdCl 2 Solution induction, electroless Co-P plating, until no bubbles are generated, one electroless plating is complet...

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Abstract

The invention relates to hydrogen production and hydrogen storage technologies and materials, in particular to a catalyst for catalytic hydrolysis of borane for the hydrogen production and a preparation method thereof, thereby solving the problems that the direct application of powder catalyst in a catalytic hydrolysis solid-liquid reaction system can cause the loss of the catalyst, the catalytic hydrolysis reaction is difficult to control and the hydrolysis by-products are difficult to be recovered, etc. The catalyst is composed of an active component and a carrier; the active component is a binary, ternary or multinary alloy or a single precious metal or the combination thereof which is composed of one or more transition metals, rare earth metals or precious metals and metalloids; the active component is deposited on the carrier through the improved chemical plating technology, the surface thereof is rough and porous, and the structure of the prepared catalyst is the amorphous or the nanocrystalline structure. The preparation method has simple preparation process, high preparation efficiency and convenient large-scale preparation; the sources of the used raw materials are rich; the catalytic activity of the prepared supported catalyst is high, the real-time control of the catalytic hydrolysis reaction of the borane can be realized, the catalytic performance is stable, and the catalyst can be repeatedly used for a plurality of times.

Description

technical field [0001] The invention relates to hydrogen production and hydrogen storage technology and materials, in particular to a supported catalyst for hydrogen production by catalytic hydrolysis of borohydride and a preparation method thereof. Background technique [0002] Hydrogen is recognized as the most ideal clean energy carrier, with significant advantages such as high gravimetric energy storage density, wide range of sources, recyclable utilization and no negative environmental effects in the process of energy utilization. The use of hydrogen fuel to drive transportation can achieve "zero emissions", which is regarded as a symbolic progress in the process of promoting the application of hydrogen energy. However, due to the lack of efficient and safe on-board hydrogen storage technology, the commercialization of hydrogen-fueled vehicles is severely restricted. [0003] Hydrogen storage methods can be divided into two categories: physical and chemical methods. T...

Claims

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Application Information

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IPC IPC(8): B01J23/889B01J27/185B01J23/46B01J23/40B01J23/83B01J23/888C01B6/00
Inventor 戴洪斌王平梁艳
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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