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Nano palladium based catalyst and preparation and application thereof

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: 2017-06-20
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Nano palladium based catalyst and preparation and application thereof
  • Nano palladium based catalyst and preparation and application thereof
  • Nano palladium based catalyst and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1, Pd / NMC catalyst preparation:

[0026] At 35°C, put 3.25g of ZrOCl in a 1L beaker 2 ·8H 2O and 20.0 g of P123 were dissolved in a solution of 130 mL of 37% HCl mixed with 650 mL of water. Add 42.50g of ethyl orthosilicate and stir for 24h. Then it was left to stand under hydrothermal heat at 100°C for 24h. 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. Rising at a rate of 2°C / min to 550°C for 4 hours in air to remove the P123 surfactant to obtain Zr-SBA-15. Mix 15.0g xylene, 15.0g furan methanol and 0.1g oxalic acid for later use. Weigh 14.0g of Zr-SBA-15 template into a 250mL beaker, stir with a glass rod, and add the polymer solution prepared above dropwise. Polymerize in an oven at 60°C for 24h and at 90°C for 24h to obtain a polyfuranmethanol-SBA-15 complex. The above-mentioned polyfuranmethanol-SBA-15 complex was raised to 150°C for 2 hours at a ...

Embodiment 2

[0027] Embodiment 2, the process that catalytic potassium formate decomposes and prepares hydrogen:

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

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

Embodiment 3

[0030] Embodiment 3, investigate the performance of Pd / NMC catalytic potassium formate decomposition hydrogen production under different reaction temperatures:

[0031] The Pd / NMC catalyst (the mass loading of palladium is 5%, and the mass doping amount of nitrogen is 9%) is tested according to Example 2 with the Pd / NMC catalyst that embodiment 1 makes, carry out formic acid under 60 ℃ and 80 ℃ conditions respectively Potassium decomposition reaction, the solution used is 6ml 2mol / L potassium formate aqueous solution, see the reaction result figure 1 .

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

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Abstract

The invention belongs to the technical field of catalysts, and specifically relates to preparation of a nano palladium based catalyst, and an application of the catalyst in a hydrogen storage circulation system taking formate as the basis. In the catalytic system, nitrogen modified mesoporous carbon is taken as the carrier, and nano level precious metal palladium is taken as the active component and has a mass percentage of 5%. The catalyst can effectively decompose a potassium formate solution to generate hydrogen in the absence of additives and is capable of catalyzing the hydrogenation of potassium bicarbonate, the stability is good, and the catalyst can also be applied to a hydrogen storage circulation system on the basis of formate.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to the preparation of a metal palladium-based catalyst supported by nitrogen-doped mesoporous carbon and its application in a formate-based hydrogen storage cycle system. Background technique [0002] Hydrogen is an important clean energy, which has the advantages of wide sources, high energy density, non-toxic and harmless, and the combustion product is only water vapor without any greenhouse gas generation, so it is considered to be a new type of promising alternative to fossil energy. Energy has always been widely concerned all over the world. With the development of fuel cell technology, it is possible to use hydrogen as a fuel to power mobile devices. However, the transportation and storage of hydrogen is an unsolved technical problem and has become a bottleneck restricting the utilization of hydrogen energy. Therefore, the development of safe and efficient hydro...

Claims

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Application Information

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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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