Preparation method and application of double non-noble metal catalyst with high specific surface area and high defects

A high specific surface area, non-precious metal technology, applied in the direction of catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, non-metallic elements, etc., can solve the problems of inability to use synthetic pure metal catalysts, high energy consumption, etc. , to achieve good cycle activity, high hydrogen production rate, and stable structure

Active Publication Date: 2020-03-31
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method is only suitable for the preparation of defective metal sulfide catalysts, and cannot be used for the synthesis of pure metal catalysts, and it is synthesized by hydrothermal method, which requires a lot of energy in the preparation process

Method used

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  • Preparation method and application of double non-noble metal catalyst with high specific surface area and high defects
  • Preparation method and application of double non-noble metal catalyst with high specific surface area and high defects
  • Preparation method and application of double non-noble metal catalyst with high specific surface area and high defects

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0044] In the step (2) of Example 1, the reaction time of the acid etching mixture at 20° C. was changed from 5 minutes to 10 minutes, and other experimental operations and drug dosages were the same as in Example 1.

[0045] The XRD spectrogram of the catalyst of embodiment 2 gained ( Figure 6 ) shows that the catalyst is still a cobalt-copper alloy structure, and the intensity and position of the diffraction peaks do not change significantly, indicating that the catalyst structure does not change with the increase of acid etching time. The prepared cobalt-copper catalyst with high specific surface area and high defects catalyzed the hydrolysis of ammonia borane in the experiment of dehydrogenation through the multi-channel micro gas flowmeter (model Rock-Solar-Ⅰ) to test the hydrogen desorption diagram ( Figure 7 ), wherein the catalytic hydrogen desorption test temperature is 25 ° C, the amount of catalyst used is 5 mg, and the ammonia borane aqueous solution adopts a con...

Embodiment 1

[0047] The dosages of cobalt chloride and cupric chloride in Examples 10-14 are shown in Table 1, and other experimental operations and drug dosages are the same as in Example 1.

[0048] Cobalt chloride and cupric chloride consumption in the embodiment 10-14 of table 1

[0049]

Embodiment 1

[0050] The catalysts obtained in Examples 10-14 have the same structure and appearance as in Example 1, only the content of metal cobalt and metal copper in the catalyst can be changed.

[0051] In Examples 15-17, the precursors of non-noble metals were replaced with ferrous chloride, nickel chloride, zinc chloride, cobalt chloride and other chlorides in Table 2. Other experimental operations and drug consumption are the same as those in Examples 1 is the same.

[0052] Cobalt chloride and other chloride consumptions in table 2 embodiment 15-17

[0053]

[0054] The catalysts obtained in Examples 15-17 have the same morphology as in Example 1, and also form double non-precious metal alloy catalysts, which have good activity in catalyzing ammonia borane to produce hydrogen.

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Abstract

The invention relates to a preparation method and application of a double non-noble metal catalyst with high specific surface area and high defects. According to the method, the double non-noble metal(iron, cobalt, nickel, copper or zinc) catalyst is prepared by adopting a liquid phase reduction method, and then etching is performed by adopting a weak acid (acetic acid or phosphoric acid), so that the catalyst has a high specific surface area and high defect sites, more catalytic reaction active sites are generated, and the double non-noble metal catalyst with high activity is prepared. The catalyst is used for catalyzing the hydrolyzing reaction of ammonia borane to release hydrogen, and has excellent performance. The method has the advantages of cheap and accessible raw materials, simple technique and mild conditions, and can realize large-scale production.

Description

technical field [0001] The invention relates to the technical field of catalysts, and specifically designs the preparation and application of a double non-noble metal catalyst with high specific surface area and high defects, which is suitable for hydrogen production by ammonia borane hydrolysis reaction. Background technique [0002] With the development of global energy in the direction of low-carbon and clean energy, traditional fossil energy can no longer meet the needs of human beings. Hydrogen has become a new popular energy source due to its advantages of high energy density, non-toxicity and zero emission. Since the storage of hydrogen requires high pressure and complex technology, many new hydrogen storage technologies and hydrogen storage materials have been developed. Among them, ammonia borane, a hydrogen storage material, has a high hydrogen content (19.6%), is non-toxic, has high solubility in aqueous solution, and has good stability in aqueous solution, makin...

Claims

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Application Information

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IPC IPC(8): B01J23/75B01J35/00B01J35/02B01J35/10B01J37/00B01J37/16C01B3/06
CPCB01J37/16B01J37/0018B01J23/75C01B3/06C01B2203/1052C01B2203/1076B01J35/40B01J35/23B01J35/60B01J35/615Y02E60/36
Inventor 杨晓婧王晨阳郝乙鑫赵建玲王西新
Owner HEBEI UNIV OF TECH
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