Catalyst Pd/Nb2C and preparation method and application thereof

A catalyst and carrier technology, applied in the field of catalyst Pd/Nb2C and its preparation, can solve the problems of large energy consumption, poor economic benefits, unfavorable development, etc., and achieve the effects of low energy consumption, good mechanical strength, and simple loading mode

Pending Publication Date: 2020-12-01
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In actual operation, there are processes such as reflux and heating, which consume a lot of energy and have poor economic benefits, which is not conducive to further development
In gas chromatography technology, the current mainstream gas chromatography separation technology of hydrogen isotope has H 2 - Displacement chromatography, head chromatography, etc., H 2 - Displacement chromatography has a large amount of preparation, the highest recovery rate and concentration rate, but the process is relatively complicated, and the head-on chromatography process is relatively simple, suitable for the preparation of deuterium from natural hydrogen

Method used

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  • Catalyst Pd/Nb2C and preparation method and application thereof
  • Catalyst Pd/Nb2C and preparation method and application thereof
  • Catalyst Pd/Nb2C and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 5 wt. % hydrofluoric acid etching Nb 2 Preparation of Nb from AlC 2 C, including the following steps:

[0033] Weigh 1.5g of Nb 2 AlC was placed in a 50mL polytetrafluoroethylene reactor, 5mL of 5 wt.% hydrofluoric acid was added, stirred at room temperature for 12h, ultrasonicated at a power of 350W for 3h, and then the precipitate was treated with water and ethanol at a volume ratio of 1:1 Filter and wash 3 times, add 5 mL of DMSO to the washed sample, and stir at room temperature for 12 h. Then wash by centrifugation, the washing condition is 5000rpm, wash 5min, repeat 3 times. These precipitates were soaked in 5 mL of deionized water, and then sonicated at 350 W for 2 h. Washed 5 times by a 1:1 mixture of water and ethanol, freeze-dried to obtain the final Nb 2 C-1.

Embodiment 2

[0035] 40 wt. % hydrofluoric acid etching Nb 2 Preparation of Nb from AlC 2 C, including the following steps:

[0036] Weigh 1.5g of Nb 2 AlC was placed in a 50mL polytetrafluoroethylene reactor, 20mL of 40wt.% hydrofluoric acid was added and stirred at room temperature for 48h, and the power was sonicated at 700W for 1h, and then the precipitate was treated with water and ethanol at a volume ratio of 1:1 Filter and wash 5 times, add 20 mL of DMSO to the washed sample, and stir at room temperature for 24 h. Then wash by centrifugation, the washing condition is 7500rpm, 10min, repeated 5 times. These precipitates were soaked in 20 mL of deionized water, and then sonicated at 500 W for 0.5 h. Washed 5 times by a 1:1 mixture of water and ethanol, freeze-dried to obtain the final Nb 2 C-2.

Embodiment 3

[0038] 50 wt. % hydrofluoric acid etching Nb 2 Preparation of Nb from AlC 2 C, including the following steps:

[0039] Weigh 1.5g of Nb 2 AlC was placed in a 50mL polytetrafluoroethylene reactor, and 50mL of 50wt.% hydrofluoric acid was added and stirred at room temperature for 72h, ultrasonically 0.5h at a power of 1000W, and then the precipitate was treated with water and ethanol at a volume ratio of 1:1 Filter and wash 8 times, add 50 mL of DMSO to the washed sample, and stir at room temperature for 36 h. Then wash by centrifugation, the washing condition is 12000rpm, 20min, repeated 8 times. These precipitates were soaked in 50 mL of deionized water, and then sonicated at 1000 W for 3 h. Washed 5 times by a 1:1 mixture of water and ethanol, freeze-dried to obtain the final Nb 2 C-3.

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Abstract

The invention discloses a catalyst Pd / Nb2C and a preparation method and application thereof. According to the catalyst, a novel two-dimensional material MXene (Nb2C) is mainly used as a carrier, Pd isused as an active component, the loading amount of the active component is 1-10wt% based on the mass of the carrier, and the prepared catalyst is used for electrolyzing heavy water to prepare deuterium gas. The catalyst provided by the invention has the advantages of simple preparation method, good stability, good overall mechanical properties and no pollution, can be used for preparing deuteriumgas by electrolyzing heavy water as a catalyst, can efficiently and rapidly generate deuterium gas, and has a wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of material preparation, in particular to a catalyst Pd / Nb 2 C and its preparation method and application. Background technique [0002] As an isotope of hydrogen, deuterium has one more neutron than hydrogen, has similar chemical properties with hydrogen, can undergo all the chemical reactions of ordinary hydrogen, and form corresponding deuterated compounds. Deuterium, known as "the natural fuel of the future", has attracted more and more attention from researchers and has a wide range of applications. It was mainly used in military fields in the early days, such as nuclear weapons, nuclear industry, and laser weapons. With the development of technology, the application of deuterium has gradually penetrated into civil applications, such as optical fiber drawing, semiconductor preparation, medicine, cultivation of agricultural products and special light sources, etc., the most prominent of which is the dra...

Claims

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Application Information

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IPC IPC(8): B01J27/22B01J37/34B01J37/08C25B1/04C25B11/08
CPCB01J27/22B01J37/343B01J37/082C25B1/04B01J35/33Y02E60/36
Inventor 王建国张世杰包志康丁磊
Owner ZHEJIANG UNIV OF TECH
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