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Palladium ruthenium/multiwall carbon nanotube (PdRu/MWNT) catalyst and preparation method thereof

A technology of multi-walled carbon nanotubes and catalysts, applied in physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc. ability and other issues, to achieve the effect of stabilizing electrocatalytic activity, improving electrochemical activity, improving electrocatalytic activity and service life

Inactive Publication Date: 2013-01-23
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Palladium nanomaterials have good electrocatalytic activity, but pure palladium nanomaterials are prone to agglomeration, which severely limits the catalytic ability of the material.

Method used

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  • Palladium ruthenium/multiwall carbon nanotube (PdRu/MWNT) catalyst and preparation method thereof
  • Palladium ruthenium/multiwall carbon nanotube (PdRu/MWNT) catalyst and preparation method thereof
  • Palladium ruthenium/multiwall carbon nanotube (PdRu/MWNT) catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1) Put the carbon nanotubes in the mixed acid of concentrated sulfuric acid and concentrated nitric acid, the volume ratio of concentrated sulfuric acid and concentrated nitric acid in the mixed acid is 3:1, react with ultrasonic at a constant temperature of 80 °C for 6 h, wash and filter with deionized water, until The filtrate has a neutral pH value and is dried at a low temperature to obtain functional grouped multi-walled carbon nanotube materials;

[0021] 2) Weigh palladium chloride (PdCl 2 ) was dispersed in deionized water, and ultrasonicated at a constant temperature of 50°C for 20 min to obtain uniform PdCl 2 aqueous solution, wherein the concentration of palladium (Pd) is 0.05mg / mL;

[0022] 3) Weigh ruthenium trichloride (RuCl 3 ) was dispersed in deionized water to obtain a uniform ruthenium trichloride aqueous solution, wherein the ruthenium ion concentration was 0.05 mg / L;

[0023] 4) Take 20 mg of the multi-walled carbon nanotube material prepared in ...

Embodiment 2

[0026] 1) Put the carbon nanotubes in the mixed acid of concentrated sulfuric acid and concentrated nitric acid, the volume ratio of concentrated sulfuric acid and concentrated nitric acid in the mixed acid is 3:1, ultrasonic reaction at a constant temperature of 90 °C for 7 h, washing and filtering with deionized water, until The filtrate has a neutral pH value and is dried at a low temperature to obtain functional grouped multi-walled carbon nanotube materials;

[0027] 2) Weigh palladium chloride (PdCl 2 ) was dispersed in deionized water, and ultrasonicated at a constant temperature of 50°C for 25 min to obtain uniform PdCl 2 aqueous solution, wherein the concentration of palladium (Pd) is 0.1 mg / mL;

[0028] 3) Weigh ruthenium trichloride (RuCl 3 ) was dispersed in deionized water to obtain a uniform ruthenium trichloride aqueous solution, wherein the ruthenium ion concentration was 0.1 mg / L;

[0029] 4) Take 10 mg of the multi-walled carbon nanotube material prepared ...

example example 3

[0032] 1) Put the carbon nanotubes in the mixed acid of concentrated sulfuric acid and concentrated nitric acid, the volume ratio of concentrated sulfuric acid and concentrated nitric acid in the mixed acid is 3:1, 100 °C constant temperature ultrasonic reaction for 8 h, washing and filtering with deionized water, until The filtrate has a neutral pH value and is dried at a low temperature to obtain functional grouped multi-walled carbon nanotube materials;

[0033] 2) Weigh palladium chloride (PdCl 2 ) was dispersed in deionized water, and ultrasonicated at a constant temperature of 50°C for 25 min to obtain uniform PdCl 2 aqueous solution, wherein the concentration of palladium (Pd) is 0.1 mg / mL;

[0034] 3) Weigh ruthenium trichloride (RuCl 3 ) was dispersed in deionized water to obtain a uniform ruthenium trichloride aqueous solution, wherein the ruthenium ion concentration was 0.05 mg / L;

[0035] 4) Take 15 mg of the multi-walled carbon nanotube material prepared in ste...

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Abstract

The invention discloses a palladium ruthenium / multiwall carbon nanotube (PdRu / MWNT) catalyst and a preparation method thereof. In the catalyst, palladium (Pd) nanoparticles are used as a catalytic active component, ruthenium (Ru) is used as a doping metal, and multiwall carbon nanotubes (MWNT) are used as a supporter. The preparation method comprises the following steps: pretreating multiwall carbon nanotubes, dispersing the multiwall carbon nanotubes in a PdCl2 and RuCl3 water solution, and adding a reducer sodium borohydride (NaBH4) so as to evenly support the palladium and ruthenium nanoparticles onto the multiwall carbon nanotube supporter. The PdRu / MWNT catalyst disclosed by the invention has higher electrochemical oxidation-reduction activatity.

Description

[0001] technical field [0002] The invention belongs to the field of inorganic materials, and specifically relates to a catalytic material and a preparation method thereof, in particular to a palladium ruthenium / multi-walled carbon nanotube (PdRu / MWNT) catalyst with high electrochemical redox properties and a preparation method thereof. Background technique [0003] In recent years, research on preparing catalytic materials with high electrochemical activity and stability, and applying the prepared materials to electrochemical detection, fuel cells, and redox of pollutants has been favored by experts in the fields of materials and electrochemistry. . In particular, the preparation of excellent electrocatalytic materials is one of the focuses of research. Palladium nanomaterials have good electrocatalytic activity, but pure palladium nanomaterials are prone to agglomeration, which severely limits the catalytic ability of the material. In order to improve the electrocatalyt...

Claims

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Application Information

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IPC IPC(8): B01J23/46H01M4/92
CPCY02E60/50
Inventor 李琴丁亮周丹丹崔皓张秋李保菊钱言翟建平
Owner NANJING UNIV
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