Preparing method of silicon-based hydrogen production material

A silicon-based and silicon alloy technology is applied in the field of preparation of silicon-based hydrogen-producing materials, which can solve the problems of restricting the development and utilization of silicon-based hydrogen-producing materials, high requirements for reaction vessels, and high cost of nano-silicon preparation, and avoids the use of strong alkaline solutions. , The effect of low material requirements and easy operation

Inactive Publication Date: 2017-09-22
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation cost of nano-silicon is high, and the strong alkali solution has high requirements on th

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Composition design of a silicon-based hydrogen production material:

[0018] 1) Aluminum-silicon alloy powder (the molar ratio of silicon / aluminum is 1), 4g; sodium stannate, 0.2g; sodium oxide, 0.2g;

[0019] 2) Aluminum-silicon alloy powder (the molar ratio of silicon / aluminum is 2), 4g; sodium stannate, 0.2g; sodium oxide, 0.2g;

[0020] 3) Magnesium-silicon alloy powder (the molar ratio of silicon / magnesium is 0.5), 4g; sodium bismuthate, 0.3g; potassium oxide, 0.2g;

[0021] 4) magnesium-silicon alloy powder (the molar ratio of silicon / magnesium is 2), 4g; sodium bismuthate, 0.3g; potassium oxide, 0.2g;

[0022] A method for preparing a silicon-based hydrogen production material comprises:

[0023] 1) Weigh a certain mass of silicon alloy powder, weak acid salt and basic oxide, and mechanically ball mill for 15 hours in an argon atmosphere;

[0024] Wherein, the particle size of the silicon alloy powder is 100 nanometers to 100 micrometers;

[0025] 2) pressing...

Embodiment 2

[0029] Composition design of a silicon-based hydrogen production material:

[0030] 5) Aluminum-silicon alloy powder (the molar ratio of silicon / aluminum is 1), 4g; sodium stannate, 0.3g; calcium oxide, 0.2g;

[0031] 6) Aluminum-silicon alloy powder (the molar ratio of silicon / aluminum is 1), 4g; sodium stannate, 0.3g; barium oxide, 0.2g;

[0032] 7) Aluminum-silicon alloy powder (the molar ratio of silicon / aluminum is 1), 4g; sodium stannate, 0.3g; strontium oxide, 0.2g;

[0033] A method for preparing a silicon-based hydrogen production material comprises:

[0034] 1) Weigh a certain mass of silicon alloy powder, weak acid salt and basic oxide, and perform mechanical ball milling in an argon atmosphere for 10 hours;

[0035] Wherein, the particle size of the silicon alloy powder is 100 nanometers to 100 micrometers;

[0036] 2) pressing the product of step 1) into blocks, the pressure range is 10 tons;

[0037] 3) Put the product of step 2) into an airtight container an...

Embodiment 3

[0040] Composition design of a silicon-based hydrogen production material:

[0041] 8) Magnesium-silicon alloy powder (the molar ratio of silicon / magnesium is 4), 4g; sodium stannate, 0.6g; calcium oxide, 0.8g;

[0042] 9) Aluminum-silicon alloy powder (the molar ratio of aluminum / magnesium is 0.5), 4g; sodium stannate, 0.3g; barium oxide, 0.05g;

[0043] 10) Zinc-silicon alloy powder (the molar ratio of silicon / zinc is 3), 4g; sodium stannate, 0.3g; strontium oxide, 0.2g;

[0044] A method for preparing a silicon-based hydrogen production material comprises:

[0045] 1) Weigh a certain mass of silicon alloy powder, weak acid salt and basic oxide, and mechanically ball mill it in an argon atmosphere for 40 hours;

[0046] Wherein, the particle size of the silicon alloy powder is 100 nanometers to 100 micrometers;

[0047] 2) pressing the product of step 1) into blocks, the pressure range is 10 tons;

[0048] 3) Put the product of step 2) into an airtight container and let ...

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Abstract

The invention relates to a preparing method of a silicon-based hydrogen production material. Silicon alloy is adopted as a precursor, weak acid salt and basic oxide are mechanically mixed, and briquetting and high-temperature treatment are conducted to obtain the silicon-based hydrogen production material; silicon alloy is magnesium silicon, aluminum silicon and zinc silicon binary alloy, the mole ratio of silicon to other metal is 0.5-4, the mass of weak acid salt is 1-20wt% that of silicon alloy, and the mass of basic oxide is 0.1-20wt% that of silicon alloy; weak acid salt is one of sodium bismuthate, potassium bismuthate, sodium stannate and potassium stannate; basic oxide is one of sodium oxide, potassium oxide, calcium oxide, barium oxide, strontium oxide, lithium oxide and rubidium oxide. The silicon-based hydrogen production material reacts with water at a normal temperature, is high in hydrogen yield, and can be used in a miniature human chat battery portable hydrogen source.

Description

technical field [0001] The invention belongs to the field of hydrogen production, and in particular relates to a preparation method of a silicon-based hydrogen production material. Background technique [0002] Elemental silicon has the advantages of wide sources, low price, and high yield of hydrolyzed hydrogen, which has attracted widespread attention of researchers in this field. The reaction of elemental silicon and water to produce hydrogen is one of the effective choices for portable hydrogen sources for fuel cells. However, the activity of elemental silicon is very low, and the reaction rate with water is too slow. Usually, it is necessary to reduce the size of silicon particles, increase the pH value and increase the temperature to speed up the reaction rate. The size effect is an important factor affecting the chemical activity of silicon particles. Document 1 (Folarin Erogbogbo, TaoLin, Phillip M. Tucciarone, et al. On-demand hydrogen generation using nanosilicon...

Claims

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Application Information

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IPC IPC(8): C01B3/06C01B3/08
CPCY02E60/36C01B3/06C01B3/08C01B2203/025
Inventor 尹天楚范美强奚诚巧申屠宏伟邹文珍陈鑫
Owner CHINA JILIANG UNIV
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