Unlock instant, AI-driven research and patent intelligence for your innovation.

Nano level modified solid hydrogen storage material of ferroferric oxide with single metal/bimetal being doped, and prepartion methpd

A technology of ferric oxide and hydrogen storage materials, which is applied in the direction of iron oxide/iron hydroxide, ferrous oxide, etc., and can solve the problems of high cost of matrix materials and complicated preparation process

Inactive Publication Date: 2007-02-21
NORTHWEST UNIV(CN)
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Due to the current "urea method" of hydrogen storage materials, the preparation process is still very complicated, the cost of the matrix material is still high, the hydrogen release temperature of the material is still as high as 350 ° C, Fe 2 o 3 The number of hydrogen storage-desorption cycles of the modified material is still no more than 5 times and the hydrogen storage capacity is still lower than the theoretical hydrogen storage capacity, that is, the maximum is only 4.1%.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Nano level modified solid hydrogen storage material of ferroferric oxide with single metal/bimetal being doped, and prepartion methpd
  • Nano level modified solid hydrogen storage material of ferroferric oxide with single metal/bimetal being doped, and prepartion methpd
  • Nano level modified solid hydrogen storage material of ferroferric oxide with single metal/bimetal being doped, and prepartion methpd

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Embodiment 1: Sample Fe 3 o 4 - Hydrogen storage performance test of mMoOy

[0054] It can be seen from Table 2 that the sample Fe 3 o 4 - The hydrogen production rate of mMoOy for four cycles hardly changed at 300°C, for example, the hydrogen production rate for four cycles remained at 224-233 μmol min at 300°C -1 Fe-g -1 Within a small range of changes, it shows that the activity of the catalyst is very stable. In addition, the amount of hydrogen produced is large (4.6-4.7%), which is close to the theoretical hydrogen storage capacity of 4.8%. The transmission electron microscope of the sample shows that the particle size is 130nm.

Embodiment 2

[0055] Embodiment 2: Sample Fe 3 o 4 -Hydrogen storage performance detection of mAlOy

[0056] It can be seen from Table 2 that the sample Fe 3 o 4 The hydrogen production rate of -mAlOy for four cycles decreased at 300 °C with the increase of the number of cycles (from 330 μmol min -1 Fe-g -1 down to 228μmol min -1 Fe-g -1 ), but the hydrogen production rate remained at 228 μmol min after 4 cycles -1 Fe-g -1 This indicates that the catalytic activity of the catalyst is still very strong. The hydrogen storage performance of this sample is much higher than the hydrogen production rate of the best sample at 300°C, that is, the hydrogen production temperature is greatly reduced. The transmission electron microscope of the sample shows that the particle size is 130nm.

Embodiment 3

[0057] Embodiment 3: Sample Fe 3 o 4 - Hydrogen storage performance test of mZrOy

[0058] It can be seen from Table 2 that the sample Fe 3 o 4 The hydrogen production performance of four cycles of -mZrOy and embodiment 2 sample Fe 3 o 4 -mAlOy has similar results. However, the hydrogen storage performance of this kind is still the sample with a higher hydrogen production rate at present, and its hydrogen production capacity is large (4.48-4.69%). The transmission electron microscope of the sample shows that the particle size is 180nm.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
specific surface areaaaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

This invention discloses a method for preparing monometal / bimetal-doped modified Fe3O4 solid hydrogen-storage nanomaterial. The chemical formula of the hydrogen-storage nanomaterial is Fe3O4-nMoOx-mMOy. Diameters of the hydrogen-storage nanomaterial particles are 50-200 nm. The specific surface area detected by BET method is 30-70 m2 .g-1. The method comprises: mixing ferrous ammonium sulfate, ferric sulfate / ferric chloride and monometal / bimetal soluble salt with distilled water at a Fe2+ / Fe3+ weight ratio of 1 : 2, dropping into excesse ammonia solution, filtering, washing the precipitate to neutrality, and vacuum-drying at 120-150 deg.C for 2-4 h. The hydrogen release temperature is lower than 300 deg.C and the storage-release cyclic times are more than 15. The experimental hydrogen content is higher than 4.5%.

Description

technical field [0001] The invention relates to a single-metal / double-metal doped nano-scale modified ferric oxide solid hydrogen storage material and a preparation method thereof. Catalytic modification is carried out by doping single metal or double metal co-precipitation method, thereby greatly reducing the cycle hydrogen production temperature of the material and increasing the cycle hydrogen storage times and making it have application prospects, belonging to the field of solid oxide hydrogen storage materials. Background technique [0002] Energy and environment are two basic issues facing human society. Hydrogen is not only a renewable resource, but also an energy source without any environmental pollution. Therefore, hydrogen energy is regarded as the most promising alternative energy source in this century. Since the 1990s, many developed countries have formulated systematic hydrogen energy development and application research plans, among which the most urgent app...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/08
Inventor 王惠王小芳董发昕田勇王新智张玉丽唐世周梁振国
Owner NORTHWEST UNIV(CN)