Unlock instant, AI-driven research and patent intelligence for your innovation.

A method for preparing tungsten carbide supported platinum catalyst by solution combustion synthesis

A platinum catalyst and solution combustion technology, applied in the field of nano-catalyst powder preparation, can solve the problems that have not yet been seen in literature and application reports, and achieve the effects of low cost, high reactivity, and increased reaction speed

Active Publication Date: 2018-03-30
UNIV OF SCI & TECH BEIJING
View PDF3 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method proposed by the present invention to prepare tungsten carbide-loaded platinum catalyst by direct combustion synthesis has not yet been reported in literature and application

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A method for preparing tungsten carbide supported platinum catalyst by solution combustion synthesis
  • A method for preparing tungsten carbide supported platinum catalyst by solution combustion synthesis
  • A method for preparing tungsten carbide supported platinum catalyst by solution combustion synthesis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Weigh 0.0075mol of ammonium tungstate, 0.05mol of urea, 0.1mol of nitric acid, 0.09mol of chloroplatinic acid, and 0.07mol of glucose, add 100ml of deionized water, and mix well in a 500ml beaker. Place the mixed solution on a closed electric furnace to heat, turn on the electric furnace to the maximum power, and stir while heating. The solution reacts after a series of processes such as volatilization, concentration, and bubbling to obtain the precursor powder. Take the precursor powder out and grind it into powder in a mortar. The obtained powder was put into a square graphite boat, and carbonized in a tube furnace protected by argon at a carbonization temperature of 900°C and a heating rate of 3°C / min. After holding for 4 hours, it was slowly cooled with the furnace to obtain tungsten carbide-supported platinum catalyst powder.

Embodiment 2

[0026] Weigh 0.0075mol of ammonium tungstate, 0.05mol of urea, 0.1mol of nitric acid, 0.09mol of chloroplatinic acid, and 0.07mol of glucose, add 100ml of deionized water, and mix well in a 500ml beaker. Place the mixed solution on a closed electric furnace to heat, turn on the electric furnace to the maximum power, and stir while heating. The solution reacts after a series of processes such as volatilization, concentration, and bubbling to obtain the precursor powder. Take the precursor powder out and grind it into powder in a mortar. The obtained powder was put into a square graphite boat, and carbonized in a tube furnace protected by argon, with a carbonization temperature of 1000°C and a heating rate of 3°C / min. After holding for 6 hours, it was slowly cooled with the furnace to obtain platinum catalyst powder supported on tungsten carbide.

Embodiment 3

[0028] Weigh 0.0075mol of ammonium tungstate, 0.05mol of urea, 0.1mol of nitric acid, 0.09mol of chloroplatinic acid, and 0.07mol of glucose, add 100ml of deionized water, and mix well in a 500ml beaker. Place the mixed solution on a closed electric furnace to heat, turn on the electric furnace to the maximum power, and stir while heating. The solution reacts after a series of processes such as volatilization, concentration, and bubbling to obtain the precursor powder. Take the precursor powder out and grind it into powder in a mortar. The obtained powder was put into a square graphite boat, and carbonized in a tube furnace protected by argon, with a carbonization temperature of 1100°C and a heating rate of 3°C / min. After holding for 6 hours, it was slowly cooled with the furnace to obtain platinum catalyst powder supported on tungsten carbide.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention provides a method for preparing a tungsten carbide-supported platinum catalyst by solution combustion synthesis, and belongs to the technical field of nano-catalyst powder preparation. Ammonium tungstate is used as tungsten source, chloroplatinic acid is used as platinum source, water-soluble organic compounds such as citric acid, glucose and sucrose are used as carbon source, urea is used as fuel, and nitric acid is used as oxidant. The process is as follows: 1. Dissolve ammonium tungstate, chloroplatinic acid, carbon source, urea, and nitric acid in distilled water according to a certain proportion; 2. Heat and stir the mixed solution on a closed electric furnace, and the solution is volatilized and concentrated into precursor powder 3. After grinding the precursor powder, carry out the carbonization reaction in a tube furnace protected by argon gas, and the reaction temperature is controlled within the range of 900 to 1100 ° C, and the time is 4 to 10 hours. After the reaction, the tungsten carbide-supported platinum is obtained. catalyst powder. The preparation process of the invention is simple, the production period is short, and the industrial production is easy, and the prepared Pt / WC catalyst has the potential of large-scale popularization and application.

Description

technical field [0001] The invention provides a method for preparing a tungsten carbide supported platinum catalyst through solution combustion synthesis, and belongs to the technical field of nanometer catalyst powder preparation. The method has easy-to-obtain raw materials, simple equipment, short process flow, high efficiency and low cost, and is suitable for industrial production. Background technique [0002] Fuel cells have a long history. From the discovery of the fuel cell effect in 1838 to the emergence of the worldwide oil crisis in the 1990s, the development of fuel cells has gradually attracted people's attention from depression. A fuel cell is a power generation device that can directly convert the chemical energy of fuel into electrical energy. It has the outstanding advantages of high energy conversion efficiency, less environmental pollution, and low noise emission. However, due to the lack of efficient and inexpensive battery anode and cathode catalysts, th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/22
Inventor 刘志伟李平李杨张骏曲选辉秦明礼
Owner UNIV OF SCI & TECH BEIJING