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Preparation method and application of superfine gold-palladium nanoparticle/nitrogen-doped porous carbon composite material

A nitrogen-doped porous carbon, composite material technology, applied in chemical instruments and methods, non-metallic elements, chemical/physical processes, etc., can solve problems such as the inability to carry out large-scale practical applications

Pending Publication Date: 2022-05-13
JILIN UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

In recent years, the selective dehydrogenation of formic acid has been achieved through various homogeneous metal catalysts containing complexes such as Ru, Ir, and Fe. However, the above catalysts need to be separated from the reaction mixture, and organic solvents, ligands, and additives are used to make them Unable to carry out large-scale practical application

Method used

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  • Preparation method and application of superfine gold-palladium nanoparticle/nitrogen-doped porous carbon composite material
  • Preparation method and application of superfine gold-palladium nanoparticle/nitrogen-doped porous carbon composite material
  • Preparation method and application of superfine gold-palladium nanoparticle/nitrogen-doped porous carbon composite material

Examples

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preparation example Construction

[0032] A preparation method of ultrafine gold-palladium nanoparticles / nitrogen-doped porous carbon composite material, specifically comprising the following experimental steps:

[0033] a. Nitrogen-doped porous carbon (N-C) substrate was prepared by high-temperature annealed peanut shell powder: first weigh 500 mg of peanut shell powder and place it in a cleaned and dried ceramic crucible, and place the crucible in the center of the tube furnace. In the center, after 3 times of vacuuming, start heating (the heating rate is set to 5°C / min, the annealing temperature is set to 600°C, 700°C, 800°C and 900°C in turn, and after reaching the set temperature, keep it warm for 2h, and throughout the The heating, heat preservation and cooling processes were all in an argon protective atmosphere). After natural cooling, the obtained samples were placed in 50 mL of deionized water, ultrasonically cleaned for 1 hour, centrifuged three times, and then dried in a vacuum oven at 60°C for late...

Embodiment

[0048] In this example, Au x PD 1-x The specific preparation process and steps of the / N-C catalyst are as follows:

[0049] (1) Preparation of nitrogen-doped porous carbon (N-C) substrate material: First, weigh 500 mg of peanut shell powder and place it in a cleaned and dried ceramic crucible. Heating starts after vacuum (heating rate is set to 5°C / min, annealing temperature is set to 600°C, 700°C, 800°C and 900°C in turn, after reaching the annealing temperature, keep warm for 2h, and during the whole heating, holding and cooling process are at in an argon atmosphere). After natural cooling, put the obtained sample into 50mL deionized water, after ultrasonic cleaning for 1 hour, and centrifugation for 3 times, place it in a vacuum oven at 60°C and dry it for later use;

[0050] (2) Preparation of Au by liquid phase reduction method x PD 1-x / N-C catalyst: First weigh 100mg of the above-mentioned dried N-C substrate, add it to 30mL of deionized water, then add 0.1mL of A...

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Abstract

The invention relates to a preparation method of a superfine gold-palladium nanoparticle / nitrogen-doped porous carbon composite material and application of the superfine gold-palladium nanoparticle / nitrogen-doped porous carbon composite material as a catalyst in a formic acid decomposition hydrogen production reaction. In an experiment, peanut shell powder is used as a raw material, and nitrogen-doped porous carbon (N-C) is obtained by performing high-temperature annealing on the peanut shell powder. Na2PdCl4 and HAuCl4 are used as metal precursors, nitrogen-doped porous carbon is used as a substrate, triaminopropyltriethoxysilane (APTES) is used as a dispersing agent, NaBH4 is used as a reducing agent, and the superfine gold-palladium nanoparticle / nitrogen-doped porous carbon composite material is prepared through a wet chemical reduction method. The composite material is used as a catalyst for formic acid decomposition hydrogen production reaction, and shows excellent catalytic activity at room temperature, and the TOF value of the composite material is up to 2118h <-1 >. The preparation method disclosed by the invention is simple, low in cost, capable of realizing batch production and high in catalytic activity, provides a new method for synthesizing a high-performance metal catalyst, and has a wide application prospect in a reaction for producing hydrogen by decomposing formic acid.

Description

technical field [0001] The invention belongs to the technical field of catalytic materials, and specifically relates to a preparation method of an ultrafine gold-palladium nanoparticle / nitrogen-doped porous carbon composite material and its application as a catalyst in formic acid decomposition hydrogen production reaction. Background technique [0002] Since entering the 21st century, energy, information and materials have been called the three pillars of the development of modern society. However, with the rapid development of human society and economy, traditional energy sources such as fossils (coal, oil, natural gas) are increasingly exhausted, and the environmental problems caused by burning fossil energy are becoming increasingly severe. Therefore, research and development of new clean and sustainable energy sources (Solar energy, wind energy, nuclear energy, biomass energy, geothermal energy, etc.) In 2011, the nuclear leak caused by the earthquake in Japan caused p...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/10C01B3/22
CPCB01J27/24C01B3/22B01J35/60
Inventor 王军王智力曲燕宾崔玉环李建忱蒋青
Owner JILIN UNIV
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