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A nitrogen-doped carbon-coated Ru nanocatalyst and its application in electrochemical deuterium evolution reaction

A nano-catalyst, nitrogen-doped carbon technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc. Active site, the effect of increasing conductivity

Active Publication Date: 2022-01-11
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult to remove protium, and the treatment process is very complicated

Method used

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  • A nitrogen-doped carbon-coated Ru nanocatalyst and its application in electrochemical deuterium evolution reaction
  • A nitrogen-doped carbon-coated Ru nanocatalyst and its application in electrochemical deuterium evolution reaction
  • A nitrogen-doped carbon-coated Ru nanocatalyst and its application in electrochemical deuterium evolution reaction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1 The preparation method of a nitrogen-doped carbon-coated Ru nanocatalyst (loading capacity 2.5%) is as follows:

[0027] Accurately weigh 40 mg of ammonium sulfate, 40 mg of glucose and 1.6 g of dicyandiamide in a mortar, mix them uniformly first, then add 4.5 mg of ruthenium trichloride into it, grind for 30 min with a grinding rod to obtain a uniformly mixed mixture, pour the mixture into the crucible, and then the crucible was placed in a tube furnace, under N 2 Atmosphere with 3 o C / min heating rate from room temperature to 800 o C, then calcine at constant temperature for 1 h and then cool down to room temperature naturally. The nitrogen-doped carbon-coated Ru nanocatalyst can be prepared by taking out the calcined product and grinding it evenly. Carry out TEM characterization of the nitrogen-doped carbon-coated Ru nanocatalyst prepared in this example, the characterization results are as follows figure 2 shown, from figure 2 It can be seen that th...

Embodiment 2

[0028] Example 2 The preparation method of a nitrogen-doped carbon-coated Ru nanocatalyst (loading capacity 5%) is as follows:

[0029] Accurately weigh 40 mg of ammonium sulfate, 40 mg of glucose and 1.6 g of dicyandiamide in a mortar, mix them uniformly first, then add 9.0 mg of ruthenium trichloride into it, and grind with a grinding rod for 30 minutes to obtain a uniformly mixed mixture, pour the mixture into the crucible, and then the crucible was placed in a tube furnace, under N 2 Atmosphere with 3 o C / min heating rate from room temperature to 800 o C, then calcine at constant temperature for 1 h and then cool down to room temperature naturally. The nitrogen-doped carbon-coated Ru nanocatalyst can be prepared by taking out the calcined product and grinding it evenly.

Embodiment 3

[0030] Example 3 The preparation method of a nitrogen-doped carbon-coated Ru nanocatalyst (loading capacity 7.5%) is as follows:

[0031]Accurately weigh 40 mg of ammonium sulfate, 40 mg of glucose and 1.6 g of dicyandiamide in a mortar, mix them uniformly first, then weigh 13.5 mg of ruthenium trichloride and add them, grind for 30 min with a grinding rod to obtain a uniformly mixed mixture, pour the mixture into the crucible, and then the crucible was placed in a tube furnace, under N 2 Atmosphere with 3 o C / min heating rate from room temperature to 800 o C, then calcine at constant temperature for 1 h and then cool down to room temperature naturally. The nitrogen-doped carbon-coated Ru nanocatalyst can be prepared by taking out the calcined product and grinding it evenly.

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Abstract

The invention discloses a nitrogen-doped carbon-coated Ru nanocatalyst and its application in electrochemical deuterium evolution reaction. The catalyst has a core-shell structure, and the catalyst shell is a nitrogen-doped porous carbon material. The core layer of the catalyst is ruthenium nanoparticles; the preparation method of the catalyst is: grind and mix organic nitrides, organic carbides, porogens and ruthenium salts in a mortar, and then calcinate at high temperature under a nitrogen atmosphere. The product is taken out and ground evenly to obtain the final catalyst. The nitrogen-doped carbon-coated Ru nanocatalyst of the present invention forms a carbon-coated structure with ruthenium through nitrogen doping, and these nitrogen-doped porous carbon structures can form good coordination with Ru metal, changing the relationship between them. The charge structure increases the active sites, thereby improving the deuterium production reaction performance of the catalyst pair. The catalyst preparation process is completed in one step, which can quickly generate deuterium gas, and at the same time has good stability and has a wide range of application prospects.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and in particular relates to a nitrogen-doped carbon-coated Ru nanometer catalyst and its application in electrochemical deuterium evolution reaction. Background technique [0002] Electrocatalytic hydrogen production (HER) is a one-stage reaction of electrolysis of water. In recent years, it has been explored by a large number of researchers and achieved good results. A fast and efficient catalyst for electrocatalytic hydrogen production has been prepared. However, electrocatalytic deuterium production (DER) is still a very challenging field. Deuterium is an isotope of hydrogen with twice the atomic mass and a triple point of -254.4 o C; Specific heat capacity: 5.987 m 3 / kg (101.325kPa, 21.2 o C); gas-liquid volume ratio: 974 L / L (15 o C, 100kPa); the critical temperature is -234.8 o C; heat of vaporization ΔH v is 305 kJ / kg (-249.5 o C). Deuterium has the same chemical pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/01C25B11/054C25B11/065C25B11/081B82Y30/00B82Y40/00
CPCC25B1/00B82Y30/00B82Y40/00B22F1/16
Inventor 王建国包志康张世杰丁磊
Owner ZHEJIANG UNIV OF TECH
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