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Method for preparing high-dispersibility nano Pt-SnO2/C catalyst

A pt-sno2, catalyst technology, applied in the chemical industry, can solve the problems of complex preparation process, poor loading morphology, etc., and achieve the effects of simple operation, uniform distribution and small particle size

Inactive Publication Date: 2014-03-26
BEIJING UNIV OF CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, for nano-SnO 2 The preparation methods mainly include impregnation method, sol-gel method, etc. The preparation process of these methods is complicated, the loading morphology is poor, and the particle size is above 50nm. Nano SnO 2 And it is of pioneering significance to apply it to Pt / C catalyst

Method used

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  • Method for preparing high-dispersibility nano Pt-SnO2/C catalyst
  • Method for preparing high-dispersibility nano Pt-SnO2/C catalyst
  • Method for preparing high-dispersibility nano Pt-SnO2/C catalyst

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Effect test

Embodiment 1

[0023] Preparation of Carbon Black-supported Nano-SnO Composite Catalyst with 20% Loading Capacity and Highly Dispersed Nano-Pt-SnO 2 / C Catalyst

[0024] (1) Preparation of 20% carbon black-supported nano-tin dioxide catalyst by ultrasonic method

[0025] In the 1g carbon black isopropanol solution acidified with nitric acid, the volume of isopropanol is 30~70ml, ultrasonically disperse for 5min~30min, so that the carbon black solution is evenly dispersed;

[0026] 20% SnO loading per unit mass of carbon black 2 Add soluble tin salt to the carbon black solution, adjust the pH value of the solution to 1~3 at the same time, put it into an ultrasonic washing machine for 10~100min, and the ultrasonic power is 30Hz~100Hz to obtain acidified carbon black containing tin salt the suspension;

[0027] Put the solution into an oven for drying at a temperature of 60°C to 100°C, collect the sample after evaporating to dryness, and heat-treat the solid powder under the conditi...

Embodiment 2

[0032] Preparation of 40% Carbon Black-supported Nano-SnO Composite Catalyst and Highly Dispersed Nano-Pt-SnO2 / C Catalyst

[0033] (1) Preparation of 40% carbon black-supported nano-tin dioxide catalyst by ultrasonic method

[0034] In 1 g of carbon black isopropanol solution acidified with nitric acid, the volume of isopropanol is 30-70 parts by weight, ultrasonically dispersed for 5min-30min, so that the carbon black solution is evenly dispersed;

[0035] 40% SnO loading per unit mass of carbon black 2 Add soluble tin salt to the carbon black solution, adjust the pH value of the solution to 1~3 at the same time, put it into an ultrasonic washing machine for 10~100min, and the ultrasonic power is 10Hz~50Hz to obtain acidified carbon black containing tin salt the suspension;

[0036] Put the solution into an oven for drying at a temperature of 60°C to 100°C, collect the sample after evaporating to dryness, and heat-treat the solid powder under the condition of iner...

Embodiment 3

[0041] Preparation of Carbon Black-supported Nano-SnO Composite Catalyst with 60% Loading Capacity and Highly Dispersed Nano-Pt-SnO 2 / C Catalyst

[0042] (1) Preparation of 60% carbon black-supported nano-tin dioxide catalyst by ultrasonic method

[0043] In 1 g of carbon black isopropanol solution acidified with nitric acid, the volume of isopropanol is 10 to 100 parts by weight, ultrasonically dispersed for 5 min to 30 min, so that the carbon black solution is uniformly dispersed;

[0044] 60% SnO loading per unit mass of carbon black 2 Add soluble tin salt to the carbon black solution, adjust the pH value of the solution to 1~3 at the same time, put it into an ultrasonic washing machine for 10~100min, and the ultrasonic power is 10Hz~50Hz to obtain acidified carbon black containing tin salt the suspension;

[0045] Put the solution into an oven for drying at a temperature of 60°C to 100°C, collect the sample after evaporating to dryness, and heat-treat the soli...

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Abstract

The invention discloses a method for preparing a high-dispersibility nano Pt-SnO2 / C catalyst. Carbon black loaded nano tin dioxide and loaded platinum-based tin dioxide binary composite catalyst is prepared by an ultrasonic-assisted method, and the prepared catalyst has high electrocatalytic activity and durability on oxygen reduction reaction under the acidic condition. Compared with a platinum / carbon black catalyst, the high-dispersibility nano Pt-SnO2 / C catalyst has the characteristics of low price, stable performance and the like.

Description

technical field [0001] The invention belongs to the field of chemical industry, in particular, relates to a highly dispersed nano Pt-SnO 2 / C catalyst preparation method, in particular a method for preparing supported platinum-based tin dioxide composite catalyst by ultrasonic-assisted method. Background technique [0002] As an important material basis for social and economic development, energy is a prerequisite for improving people's living standards. In recent years, due to the extravagance and waste of energy development, it has caused a lot of losses to the national economy. Therefore, energy conservation, emission reduction, and efficient use of energy have become the focus of the entire society. At present, in the fields of low-temperature fuel cells and metal-air batteries, the application of oxygen reduction reaction is a necessary step, but due to the slow kinetic process of oxygen reduction reaction itself and the high reaction overpotential, a large amount of e...

Claims

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Application Information

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IPC IPC(8): B01J23/14B01J23/62H01M4/92
CPCY02E60/50
Inventor 王峰郭壮刘景军宋夜李志林吉静贾怡覃事永张良虎康建忠
Owner BEIJING UNIV OF CHEM TECH
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