A kind of nano-palladium-based catalyst and its preparation and application

A catalyst, nano-palladium technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of lack of two-way catalysts, and achieve the effect of high industrial practical application potential

Active Publication Date: 2019-08-27
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The present invention is aimed at the problem that the existing hydrogen storage system based on formic acid or formate lacks an efficient and reliable bidirectional catalyst, and provides a method that can efficiently decompose potassium formate to generate hydrogen without any additives, and can Reversibly activate potassium bicarbonate hydrogenation, realize the reversible cycle of hydrogen nano-palladium-based catalyst and preparation method thereof

Method used

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  • A kind of nano-palladium-based catalyst and its preparation and application
  • A kind of nano-palladium-based catalyst and its preparation and application
  • A kind of nano-palladium-based catalyst and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1. Preparation of Pd / NMC catalyst:

[0026] Put 3.25g ZrOCl in a 1L beaker at 35℃ 2 ·8H 2 O and 20.0 g P123 were dissolved in a solution of 130 mL 37% HCl and 650 mL water. Add 42.50g of ethyl orthosilicate and stir for 24h. Then, let it stand for 24 hours at 100°C. The precipitate was filtered, washed with a small amount of ethanol, and dried overnight at room temperature. Dry in an oven at 60°C for 12 hours. The temperature was raised to 550°C at a rate of 2°C / min and calcined in air for 4 hours to remove the P123 surfactant to obtain Zr-SBA-15. Mix 15.0 g of xylene, 15.0 g of furan methanol and 0.1 g of oxalic acid for later use. Weigh 14.0g of Zr-SBA-15 template into a 250mL beaker, stir with a glass rod, and add dropwise the polymer solution prepared above. Polymerize in an oven at 60°C for 24 hours and at 90°C for 24 hours to obtain a polyfuran methanol-SBA-15 complex. Raise the above-mentioned polyfuran methanol-SBA-15 compound in ammonia at a heating ...

Embodiment 2

[0027] Example 2. The process of catalyzing the decomposition of potassium formate to produce hydrogen:

[0028] Step 1: First put 20mg of catalyst into the reactor, add a certain concentration of potassium formate solution, and quickly put it into a constant temperature water bath heated to the required temperature, turn on the stirring after the heat balance, and continuously obtain gas.

[0029] Step 2: Quantify the obtained mixed gas through the gas pipe.

Embodiment 3

[0030] Example 3. Investigate the performance of Pd / NMC to catalyze the decomposition of potassium formate to produce hydrogen at different reaction temperatures:

[0031] The Pd / NMC catalyst prepared in Example 1 (the mass loading of palladium is 5% and the amount of nitrogen incorporated is 9%) was tested according to Example 2. The formic acid was carried out at 60°C and 80°C respectively. Potassium decomposition reaction, the solution used is 6ml 2mol / L potassium formate aqueous solution, the reaction result is shown figure 1 .

[0032] From figure 1 It can be seen that Pd / NMC can effectively decompose potassium formate aqueous solution at 60℃, and the initial conversion frequency is 1589h -1 . After raising the temperature to 80°C, the catalytic activity is further improved, about twice that at 60°C, and the initial conversion frequency is increased to 3377h -1 .

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Abstract

The invention belongs to the technical field of catalysts, and in particular relates to the preparation of a nano-palladium-based catalyst and its application in a formate-based hydrogen storage circulation system. The catalytic system uses nitrogen-modified mesoporous carbon as a carrier and nanometer-scale noble metal palladium as an active component, and its mass content is 5%. The catalyst can effectively decompose potassium formate solution to generate hydrogen without any additives, and catalyze the hydrogenation of potassium bicarbonate, and shows good stability, and can be applied in the formate-based hydrogen storage cycle system .

Description

Technical field [0001] The invention belongs to the technical field of catalysts, and specifically relates to the preparation of a nitrogen-doped mesoporous carbon-supported metal palladium-based catalyst and its application in a formate-based hydrogen storage cycle system. Background technique [0002] Hydrogen is an important clean energy. It has the advantages of a wide range of sources, high energy density, non-toxic and harmless, and the product of combustion is only water vapor, without any greenhouse gas production, so it is considered a new type of promising alternative to fossil energy. Energy has always received widespread attention all over the world. With the development of fuel cell technology, it has become possible to use hydrogen as a fuel to power mobile devices. However, the transportation and storage of hydrogen is a technical problem that has not yet been overcome and has become a bottleneck restricting the utilization of hydrogen energy. Therefore, the devel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24C01B3/22
Inventor 黄延强王发楠徐金铭邵先钊张涛
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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