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Application of three-dimensional transitional metal nanoarray used as catalyst for hydrogen production from hydroboron

A technology of transition metals and nano-arrays, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of reducing catalyst usage efficiency, difficult to control hydrolysis reaction, difficult to separate and recycle, etc., to achieve excellent Catalytic activity and stability, promotion of efficient transport, and efficient hydrolysis for hydrogen production

Inactive Publication Date: 2016-09-21
成都玖奇新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the catalysts currently used are in the form of particles, including transition metals or noble metals and their salts, transition metal borides, etc. Although these catalysts have high activity, they are easy to agglomerate during use, and it is difficult to separate and recover after use, which reduces the use efficiency. , and the hydrolysis reaction is difficult to control
In order to facilitate catalyst recovery, the in-situ growth of granular catalysts on the surface of the carrier can be achieved by electrochemical deposition or electroless deposition techniques, but the contact area between these granular catalysts and the reaction solution is limited, which reduces the use efficiency of the catalyst

Method used

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  • Application of three-dimensional transitional metal nanoarray used as catalyst for hydrogen production from hydroboron
  • Application of three-dimensional transitional metal nanoarray used as catalyst for hydrogen production from hydroboron
  • Application of three-dimensional transitional metal nanoarray used as catalyst for hydrogen production from hydroboron

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Step 1: Add 20 mL of distilled water to the PTFE liner, then add 0.291 g of cobalt nitrate, 0.093 g of ammonium fluoride and 0.30 g of urea and stir until the solids are completely dissolved to form a transparent solution.

[0032] Step 2: Put the titanium mesh into the inner lining of the reactor in step 1, seal the polytetrafluoroethylene inner lining into a stainless steel mold, put it in a constant temperature drying oven under closed conditions, and heat and react at 120° C. for 6 hours.

[0033] Step 3: After the reaction is completed, the titanium mesh is taken out, washed with distilled water and absolute ethanol in turn, and the washed titanium mesh is annealed at 400°C for 3 hours in an air atmosphere to obtain a three-dimensional Co 3 o 4 nanowire array ( figure 1 ).

[0034] Step 4: Select the concentration of the sodium borohydride alkaline solution to be 1 wt%, wherein the concentration of sodium hydroxide is 1 wt%, and the total volume of the solution i...

Embodiment 2

[0036] Step 1: Add 36 mL of distilled water to the PTFE liner, add 1.45395 g of nickel nitrate and 1.4019 g of hexamethylenetetramine, and stir until the solids are completely dissolved to form a transparent solution.

[0037]Step 2: Put the carbon fiber cloth into the inner lining of the reactor in step 1, seal the polytetrafluoroethylene inner lining into a stainless steel mold, place it in a constant temperature drying oven under closed conditions, and heat it at 100°C for 10 hours.

[0038] Step 3: After the reaction is completed, take out the carbon fiber cloth, wash it, arrange the washed carbon fiber in a vacuum drying oven and dry it in vacuum at 40°C for 24 hours to obtain a nickel hydroxide nanosheet array structure, and then place it in an air atmosphere , and annealed at 400 °C for 2 h to obtain a three-dimensional NiO nanosheet array.

[0039] Step 4: Select the concentration of the sodium borohydride alkaline solution to be 5wt%, wherein the concentration of sodi...

Embodiment 3

[0041] Step 1: Add 35mL of distilled water to the polytetrafluoroethylene lining, add 0.87g of cobalt nitrate, 0.11g of ammonium fluoride and 0.18g of urea to each milliliter of water, stir and dissolve to form a transparent solution.

[0042] Step 2: Put the silicon wafer into the lining of the reaction kettle in Step 1, seal the polytetrafluoroethylene lining into a stainless steel mold, place it in a constant temperature drying oven under closed conditions, and heat and react at 120°C for 12 hours.

[0043] Step 3: After the reaction is completed, the silicon wafer is taken out, cleaned, and the washed silicon wafer is placed in a vacuum drying oven and vacuum-dried at 40° C. for 24 hours to obtain a Co(OH)F nanowire array structure, and then in Annealed at 420 °C for 2 h in an ammonia atmosphere to obtain a three-dimensional Co 4 N nanowire arrays.

[0044] Step 4: Select the concentration of the sodium borohydride alkaline solution to be 10wt%, wherein the concentration ...

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Abstract

The invention discloses an application of a three-dimensional transitional metal nanoarray used as a catalyst for hydrogen production from hydroboron, and belongs to the fields of hydrogen energy and fuel cells. Compared with the prior art, the three-dimensional transitional metal (elementary substance, hydroxide, oxide, nitride and carbide) nanoarray is initially taken as the overall catalyst used for the hydrolysis hydrogen production of the hydroboron; the catalyst has excellent catalytic activity and stability; due to the structure, the contact area between the solid catalyst and the reaction solution is greatly enlarged; the mass transfer between the reactant and the product is promoted; the problems that the nanocatalyst is easy to aggregate and it is hard to separate the nanocatalyst from hydrolysis by products can be avoided effectively; and therefore, the catalyst is suitable for a continuous hydrogen production process.

Description

technical field [0001] The invention belongs to the field of hydrogen energy and fuel cells, and more specifically relates to nano-arrays of transition metal simple substances, hydroxides, oxides, nitrides and carbides as high-efficiency and long-life monolithic catalysts for hydrogen production by hydrolysis of borohydrides . Background technique [0002] The depletion of traditional fossil fuels, the destruction of the ecological environment, and the need for sustainable development of human society urgently require research and development of new energy sources. Hydrogen energy has attracted much attention due to its characteristics of storability, high efficiency and cleanliness. Hydrogen fuel cells have broad application prospects in fixed power stations, electric vehicles, military special power supplies, and mobile power supplies. The specific power and practicality of the system play a decisive role. Compressed storage and liquid hydrogen storage have low safety a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90B82Y30/00
CPCB82Y30/00H01M4/9016H01M4/9041H01M4/9075Y02E60/50
Inventor 罗永岚阳海
Owner 成都玖奇新材料科技有限公司
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