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Preparation method of palladium catalyst,

A palladium catalyst and reaction technology, which is applied in the fields of electrochemistry and the environment, can solve the problems of large amount of metal usage, complex catalyst components, and low performance, and achieve the effects of uniform distribution, high metal reduction efficiency, and simple preparation process

Active Publication Date: 2012-11-07
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its catalyst composition is complex and the amount of metal used is large, and the performance of the prepared gas diffusion electrode is also lower than that of a gas diffusion electrode prepared with a carbonaceous material with a large specific surface area.

Method used

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  • Preparation method of palladium catalyst,
  • Preparation method of palladium catalyst,

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] 1. Preparation of pretreated carbon support

[0049] 1) Active carbon powder (5g) is joined in the there-necked flask of 250mL, and add magnetic rotor, then add the concentrated sulfuric acid solution of 25mL concentrated nitric acid solution and 75mL, wherein, the mass percentage concentration of concentrated nitric acid solution is 65%, the concentrated sulfuric acid solution The mass percentage concentration is 98%, and the particle size of activated carbon powder is 20-70nm;

[0050] 2) Stir on a constant temperature magnetic stirrer, heat up to 60°C, carry out oxidation reaction at 60°C for 1 hour to increase the amount of oxygen-containing functional groups on the surface of the carbonaceous support, then cool to room temperature (20°C) and filter, the filter residue Wash with deionized water until the washing liquid is neutral (ie, the pH value of the effluent after washing is 7.0).

[0051] 3) drying the washed filter residue at 70° C. to a constant weight to o...

Embodiment 2

[0065] 1. Preparation of pretreated carbon support

[0066] 1) Add carbon nanotubes (5g) into a 250mL three-necked flask, add a magnetic rotor, then add 20mL of nitric acid solution and 80mL of sulfuric acid solution, wherein the mass percent concentration of the nitric acid solution is 60%, and the mass percent of the sulfuric acid solution The concentration is 80%, the diameter of carbon nanotubes is 40-60nm, and the length is 1-2μm;

[0067] 2) Stir on a constant temperature magnetic stirrer, and heat up to 65°C, carry out oxidation reaction at 65°C for 1.5h, then cool to room temperature (25°C) and filter, and wash the filter residue with deionized water until the washing liquid is medium (i.e. the pH of the washed effluent is 7.0).

[0068] 3) drying the washed filter residue at 60° C. to a constant weight to obtain a pretreated carbonaceous carrier.

[0069] The oxygen-containing groups on the surface of the pretreated carbonaceous support were measured by Boehm titrat...

Embodiment 3

[0082] 1. Preparation of pretreated carbon support

[0083] 1) Add carbon nanotubes (5g) into a 250mL three-necked flask, add a magnetic rotor, then add 33.3mL of concentrated nitric acid solution and 66.7mL of concentrated sulfuric acid solution, wherein the mass percent concentration of the concentrated nitric acid solution is 65%, The mass percent concentration of the concentrated sulfuric acid solution is 60%, the diameter of the carbon nanotube is 40-60nm, and the length is 1-2μm;

[0084]2) Stir on a constant temperature magnetic stirrer, heat up to 55°C, carry out an oxidation reaction at 55°C for 3 hours to increase the amount of oxygen-containing functional groups on the surface of the carbonaceous support, then cool to room temperature (20°C) and filter, The filter residue was washed with deionized water until the washing liquid was neutral (that is, the pH value of the effluent after washing was 7.0).

[0085] 3) drying the washed filter residue at 80° C. to a cons...

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Abstract

palladium catalyst prepared by method and application thereof The invention discloses a preparation method of a palladium catalyst, the palladium catalyst prepared by the method and an application thereof, and belongs to the field of environmental technologies. The preparation method of the palladium catalyst comprises the following steps of: firstly carrying out acid pretreatment on a carbon carrier to prepare a pretreated carbon carrier; mixing palladium chloride, sodium citrate, glycol with the pretreated carbon carrier, carrying out oxidation reduction reaction, and loading reduction state palladium onto the pretreated carbon carrier after the reaction. The amorphous active metal component Pd prepared by the method is uniformly distributed on the surface of the carbon carrier. The particle size of the component Pd is distributed within 3 nm to 6 nm and the active metal component Pd has strong adhesion, high dispersity and high effective unitization rate. When the Pd catalyst is used as an electrochemical cathode, the greenhouse gas carbon dioxide is reduced into liquid fuel. The reduction efficiency of carbon dioxide is high; the yield of the liquid fuel is high; and the purpose of reducing carbon discharge is effectively achieved.

Description

technical field [0001] The invention relates to a metal-containing catalyst, its preparation method and application, in particular to a noble metal-combined catalyst, its preparation method and application, and belongs to the technical fields of electrochemistry and environment. Background technique [0002] At present, due to the development of economy and the sharp increase of human energy consumption, the global warming phenomenon caused by this has attracted more and more attention. As the main factor affecting global warming, carbon dioxide emission reduction has become a top priority. As early as the beginning of the twentieth century, people began to study the utilization technology of carbon dioxide, but because carbon dioxide is the product of the highest oxide stage of carbon and has strong chemical stability, the reuse technology of carbon dioxide has made slow progress. At present, the treatment technology of carbon dioxide is mainly carbon dioxide fixation tech...

Claims

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Application Information

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IPC IPC(8): B01J23/44C25B3/04C25B11/08C25B3/25
Inventor 王辉鲁光卞兆勇魏祥甲
Owner BEIJING FORESTRY UNIVERSITY
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