Ternary metal palladium-based catalyst as well as preparation method and application thereof

A ternary metal and catalyst technology, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as high cost and low efficiency, and achieve high-efficiency formic acid Dehydrogenation, simple preparation method, and the effect of enhancing the dehydrogenation effect

Active Publication Date: 2022-02-25
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The ternary metal palladium-based catalyst prepared by the present invention can well realize dehydrogenation in a dark environment and under the condition of visible light, which solves the technical problems of high cost and low efficiency of the current palladium-based catalyst

Method used

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  • Ternary metal palladium-based catalyst as well as preparation method and application thereof
  • Ternary metal palladium-based catalyst as well as preparation method and application thereof
  • Ternary metal palladium-based catalyst as well as preparation method and application thereof

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preparation example Construction

[0033] A kind of preparation method of ternary metal palladium-based catalyst of the present invention, silver-white foamed nickel is placed in gold salt solution (such as chloroauric acid solution), ultrasonically reacts, obtains the foamed nickel of tawny gold load, uses deionized water Wash the sample repeatedly with ethanol, dry the gold-loaded foam nickel naturally, immerse it in a palladium salt solution (such as a solution of sodium chloropalladate), use a reducing agent to reduce the palladium ions, leave it to age for a period of time, and use it to remove the palladium ions. The samples were rinsed repeatedly with ionized water and ethanol, and dried naturally to obtain a ternary metal palladium-based catalyst. Specifically include the following steps:

[0034] (1) At room temperature, weigh 20mm*10mm*2mm (0.0200-0.0290g) nickel foam and place it in deionized water, ethanol, acetone and hydrochloric acid (0.1-2M) in turn, shake and ultrasonic for 3-40 minutes each ,...

Embodiment 1

[0051] At room temperature, place a piece of 20mm*10mm*2mm silver-white foam nickel in deionized water, ethanol, acetone and hydrochloric acid (0.1-2M) for 10 minutes, and place it in 0 μL chloroauric acid solution after drying naturally. (5-50mM) while shaking and sonicating for 5-10 minutes, respectively, to obtain the yellow-brown gold-loaded nickel foam. Rinse the sample repeatedly with deionized water and ethanol, dry the gold-loaded nickel foam naturally, place it in a solution containing 5-100 μL sodium chloropalladate (5-50 mM), and use 10-1000 μL ascorbic acid ( 0.01-1M) to reduce palladium ions, let stand for aging for 10-100min, use deionized water and ethanol to wash the sample repeatedly, and dry naturally to obtain a binary palladium-based catalyst.

Embodiment 2

[0053] At room temperature, put a piece of 20mm*10mm*2mm silver-white nickel foam in deionized water, ethanol, acetone and dilute hydrochloric acid (0.1-2M) and wash it repeatedly for 10 minutes each. In the solution (5-50mM), shake and sonicate for 5-20 minutes, respectively, to obtain the yellow-brown nickel foam loaded with gold. Rinse the sample repeatedly with deionized water and ethanol, dry the gold-loaded nickel foam naturally, place it in a solution containing 5-100 μL sodium chloropalladate (5-50 mM), and use 10-1000 μL ascorbic acid after the droplets are fully diffused (0.01-1M) to reduce palladium ions, let it stand for aging for 10-100min, use deionized water and ethanol to wash the sample repeatedly, and dry naturally to obtain a ternary metal palladium-based catalyst.

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Abstract

The invention relates to a ternary metal palladium-based catalyst as well as a preparation method and application thereof, and belongs to the technical field of metal material preparation and catalysis. The palladium-based catalyst is prepared by the following steps: taking foamed nickel as a substrate template at room temperature, dipping the foamed nickel in a gold salt solution, carrying out a replacement reaction to obtain nickel-supported gold nanoparticles, and then loading metal palladium on the surfaces of the elemental gold nanoparticles to obtain a nickel-gold-palladium ternary metal catalyst. The obtained palladium-based ternary metal catalyst can realize efficient formic acid dehydrogenation under the condition of no illumination, and the catalytic activity of the catalyst can be further improved under the irradiation of visible light. The raw materials are easy to obtain, preparation is simple, large-scale production can be achieved, the palladium-based catalyst can efficiently catalyze formic acid dehydrogenation in the dark environment and the visible light environment, the problem that palladium-based catalysts are low in formic acid dehydrogenation catalysis performance at the room temperature is solved, and the ternary catalyst has good application prospects.

Description

technical field [0001] The invention belongs to the technical field of metal material preparation and catalysis, and more specifically relates to a ternary metal palladium-based catalyst, its preparation method and application. Background technique [0002] Hydrogen energy is an important green energy. The low volumetric energy density and safety risks of hydrogen in storage and transportation force us to seek high-capacity materials for safe storage and efficient release of hydrogen. Formic acid has been extensively studied as a liquid hydrogen storage medium because of its hydrogen storage properties, safe and convenient storage and transportation, and the ability to efficiently generate hydrogen through a catalytic dehydrogenation process. The excellent performance of palladium in the dehydrogenation of formic acid has attracted widespread attention. In addition, it has been reported that the addition of other transition metals to palladium can not only reduce the pallad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89C01B3/22
CPCB01J23/892B01J35/0013B01J35/004C01B3/22
Inventor 李广芳朱建南刘宏芳
Owner HUAZHONG UNIV OF SCI & TECH
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