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Method for preparing tungsten carbide platinum-loading catalyst in solution combustion synthesis mode

A platinum catalyst and solution combustion technology, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve problems that have not been seen in literature and application reports, and achieve low cost, high efficiency, and improved catalytic performance. active effect

Active Publication Date: 2016-02-10
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

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  • Method for preparing tungsten carbide platinum-loading catalyst in solution combustion synthesis mode
  • Method for preparing tungsten carbide platinum-loading catalyst in solution combustion synthesis mode
  • Method for preparing tungsten carbide platinum-loading catalyst in solution combustion synthesis mode

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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 tungsten carbide-supported platinum catalyst powder.

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Abstract

The invention provides a method for preparing a tungsten carbide platinum-loading catalyst in a solution combustion synthesis mode, and belongs to the technical field of nano-catalyst powder preparing. Ammonium tungstate serves as a tungsten source, chloroplatinic acid serves as a platinum source, water-soluble organic substances such as citric acid, glucose and saccharose serve as carbon sources, urea serves as fuel, and nitric acid serves as an oxidizing agent. The technology process includes the steps that 1, the ammonium tungstate, the chloroplatinic acid, the carbon sources, the urea and the nitric acid are dissolved into distilled water in a certain proportion; 2, the mixed solution is heated and stirred on a closed electric furnace, and the solution is volatilized and concentrated to precursor powder; 3, after the precursor powder is ground, a carbonization reaction is carried out in a tube furnace shielded with argon, the reaction temperature is controlled to range from 900 DEG C to 1,100 DEG C, the reaction time is 4 hours to 10 hours, and tungsten carbide platinum-loading catalyst powder is obtained after the reaction is finished. The method is simple in preparing technology and short in production cycle, industrial production is facilitated, and the prepared Pt / WC catalyst has the large-scale application and popularization potential.

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

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Application Information

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Patent Type & Authority Applications(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
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