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Titanium-based carbon nanotube supported copper/palladium bimetallic catalyst and preparation method thereof

A technology of bimetallic catalysts and carbon nanotubes, applied in the direction of catalyst activation/preparation, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problems of high cost and time-consuming, and achieve mechanical Good performance, good electrical performance, and the effect of increasing conductivity

Inactive Publication Date: 2013-04-03
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, some researchers have tried to use carbon nanotubes as the carrier of CuPd bimetallic catalysts and apply them to the reduction of nitrate in water; but they generally use impregnation-drying-H 2 Restoring this traditional chemical preparation process is time-consuming and costly

Method used

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  • Titanium-based carbon nanotube supported copper/palladium bimetallic catalyst and preparation method thereof
  • Titanium-based carbon nanotube supported copper/palladium bimetallic catalyst and preparation method thereof
  • Titanium-based carbon nanotube supported copper/palladium bimetallic catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1) Take 0.2 g of carbon nanotubes and place them in a mixed concentrated acid with the ratio of concentrated sulfuric acid and concentrated nitric acid at a ratio of 3:1, ultrasonicate at a constant temperature of 60 °C for 8 h, wash and filter with deionized water until the pH value of the filtrate is neutral, and dry at low temperature. Obtain functional grouped carbon nanotube materials; ultrasonically disperse in deionized water, and obtain 100 mL of carbon nanotube suspension at constant volume, the concentration of carbon nanotubes in the suspension is about 2 mg / L;

[0024] 2) The titanium plate was polished until the surface showed a uniform light gray luster; the polished titanium plate was washed with 50 wt% NaOH alkali at 70 °C for 1 h to remove the surface oil; the alkali-washed titanium plate was used at 80 °C Pickling with 20 wt% oxalic acid for 2 h to remove surface TiO 2 ;

[0025] 3) The titanium plate pretreated in step 2) was used as the anode, the P...

Embodiment 2

[0029] 1) Take 0.2 g of carbon nanotubes and place them in a mixed concentrated acid with the ratio of concentrated sulfuric acid and concentrated nitric acid at a ratio of 3:1, ultrasonicate at a constant temperature of 70 °C for 6 h, wash and filter with deionized water until the pH value of the filtrate is neutral, and dry at low temperature. Obtain functional grouped carbon nanotube materials; ultrasonically disperse in deionized water, and obtain 100 mL of carbon nanotube suspension at constant volume, the concentration of carbon nanotubes in the suspension is about 2 mg / L;

[0030] 2) The titanium plate was polished until the surface showed a uniform light gray luster; the polished titanium plate was washed with 30 wt% NaOH alkali at 90 °C for 2 h to remove surface oil; the titanium plate after alkali washing was used at 95 °C Pickling with 10 wt% oxalic acid for 4 h to remove surface TiO 2 ;

[0031] 3) The titanium plate pretreated in step 2) was used as the anode, th...

Embodiment 3

[0035] 1) Take 0.2 g of carbon nanotubes and place them in a mixed concentrated acid with the ratio of concentrated sulfuric acid and concentrated nitric acid at a ratio of 3:1, ultrasonicate at a constant temperature of 65 °C for 7 h, wash and filter with deionized water until the pH value of the filtrate is neutral, and dry at low temperature. Obtain functional grouped carbon nanotube materials; ultrasonically disperse in deionized water, and obtain 100 mL of carbon nanotube suspension at constant volume, the concentration of carbon nanotubes in the suspension is about 2 mg / L;

[0036] 2) The titanium plate was polished until the surface showed a uniform light gray luster; the polished titanium plate was washed with 40 wt% NaOH alkali at 80 °C for 1.5 h to remove surface oil; the titanium plate after alkali washing was used at 90 °C Pickling with 15 wt% oxalic acid for 3 h to remove surface TiO 2 ;

[0037] 3) The titanium plate pretreated in step 2) was used as the anode, ...

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Abstract

The invention discloses a titanium-based carbon nanotube supported copper / palladium bimetallic catalyst and a preparation method thereof. The catalyst is characterized in that double metals (namely copper and palladium) are used as catalytic active components, a carbon nanotube is used as a supporter, and a titanium plate is used as a substrate. The preparation method comprises the following steps: respectively pretreating the titanium plate and the carbon nanotube; taking the treated titanium plate as an anode, taking dispersed carbon nanotube suspension as a deposition solution, and depositing the carbon nanotube on the titanium plate through electrophoresis; and taking a dried titanium-based carbon nanotube film as a supporter, and synchronously depositing the double metals (namely copper and palladium) through electrochemical reduction in a plating solution containing the double metal elements (namely copper and palladium), thus obtaining the titanium-based carbon nanotube supported copper / palladium bimetallic catalyst. The titanium-based carbon nanotube supported copper / palladium (Ti-CNT-CuPd) bimetallic catalyst prepared by the invention has high and stable electrochemical reduction activity, and can be used as a reduction catalyst for ions such as nitrate, bromate and the like in a water body.

Description

[0001] technical field [0002] The invention belongs to the technical field of inorganic materials and nanometer materials, and specifically relates to a catalytic material and a preparation method thereof, in particular to a titanium-based carbon nanotube-supported copper-palladium bimetallic catalyst with high electrochemical reduction characteristics and a preparation method thereof. Background technique [0003] Bimetallic catalysts composed of mint metals (Cu, Ag, Au) and platinum group metals (Pt, Pd, Ir, Rh, Ru) are widely used in the field of electrochemistry, especially in the field of electrochemical reduction, due to their excellent electrochemical properties. has been extensively studied. Among them, CuPd bimetallic electrode has attracted many researchers because of its high catalytic activity and strong catalytic selectivity. As a one-dimensional nanomaterial with light weight, large specific surface area, and excellent mechanical and electrochemical properti...

Claims

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Application Information

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IPC IPC(8): B01J23/89B01J37/34C02F1/46C02F101/12C02F101/16
Inventor 李琴张秋丁亮崔皓安浩钱言李保菊翟建平
Owner NANJING UNIV
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