Loaded and non-loaded catalyst and preparing method

A catalyst and protective agent technology, applied in the field of supported and unsupported metal catalysts and preparation, can solve the problems of reducing agent toxicity, difficult to control the particle size and crystal plane orientation of catalyst active components, etc., to achieve environmental friendliness, Reduce adverse effects, controllable particle size effect

Inactive Publication Date: 2007-11-14
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The yield of the platinum ruthenium catalyst prepared by this method is high, but the size and crystal plane orientation of the catalyst active component particles are difficult to control, and the reducing agent used has certain toxicity

Method used

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  • Loaded and non-loaded catalyst and preparing method
  • Loaded and non-loaded catalyst and preparing method
  • Loaded and non-loaded catalyst and preparing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The preparation process of sample 1 is as follows: preparation of chloroplatinic acid solution: 1 gram of chloroplatinic acid is dissolved in a mixed solvent of 50 milliliters of water and 50 milliliters of ethylene glycol, and stirred evenly; preparation of protective agent solution: 1 gram of polyvinylpyrrolidone (PVP) was dissolved in a mixed solvent consisting of 50ml of water, 50ml of ethylene glycol, and 100% of ethanol, and stirred evenly. Mix the above two solutions, stir evenly, add 2ml 1mol / L NaOH ethylene glycol solution, raise the temperature to 130°C, stir, keep for 2 hours, cool down to room temperature, filter, wash with water, and centrifuge to collect the black sediment. Dry at 80° C. for 8 hours to obtain a platinum catalyst in which polyvinylpyrrolidone (PVP) is used as a protecting agent (stabilizer) and ethylene glycol is used as a reducing agent.

Embodiment 2

[0042] The preparation process of sample 2 is as follows: preparation of chloroplatinic acid solution: 1 gram of chloroplatinic acid is dissolved in a mixed solvent of 50 milliliters of water and 50 milliliters of ethylene glycol, and stirred evenly; preparation of protective agent solution: 500 milligrams of sodium polyacrylate (PAA) was dissolved in a mixed solvent consisting of 50ml of water, 50ml of ethylene glycol, and 100% of ethanol, and stirred evenly. Mix the above two solutions, stir evenly, add 2ml 1mol / L NaOH ethylene glycol solution, stir evenly, pass in hydrogen gas, keep for 10 minutes, continue stirring for 6 hours, filter, wash with water, add a mixed solution of acetone and ethanol as Sedimentation agent, centrifugal separation, collect black sedimentation material, dry at 80°C for 8 hours to obtain sodium polyacrylate (PAA) as protective agent (stabilizer), hydrogen and ethanol as reducing agent, mixed solution of acetone and ethanol as sedimentation agent p...

Embodiment 3

[0044] The preparation process of sample 3 is as follows: preparation of chloroplatinic acid solution: 1 gram of chloroplatinic acid is dissolved in a mixed solvent of 150 milliliters of water and 150 milliliters of ethylene glycol, and stirred evenly; preparation of ruthenium trichloride solution: 1 gram of trichloride Ruthenium chloride trihydrate is dissolved in the mixed solvent that 50 milliliters of water, 50 milliliters of ethylene glycols and 100 milliliters of ethanols form, stir well; Configure protective agent solution: 1 gram of polyvinylpyrrolidone (PVP) is dissolved in 50ml water, 50 milliliters In a mixed solvent composed of ethylene glycol and 100% ethanol, stir well. Mix the above three solutions, stir evenly, add 8ml 1mol / L NaOH glycol solution, stir evenly, pass in hydrogen, keep for 15 minutes, continue stirring for 6 hours, add 5g of XC-72R dispersed in ethylene glycol Carbon powder, add 1.5mol / L hydrochloric acid aqueous solution as a sedimentation agent,...

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Abstract

The present invention relates to a preparation method of catalyst whose active component particle form and crystal face orientation can be controlled. Said preparation method includes the following steps: (a), preparing soluble metal salt aqueous solution of active component, the concentration of metal salt in the solution is 1.0 X 10 to the power-6-10mol / L, adding alkali solution to make pH value be 3-9; (b), preparing aqueous solution of protection agent and stabilizing agent, the concentration of protection agent and / or stabilizing agent in said aqueous solution is 1.0 X 10 to the power-5-20mol / L, adding alkali solution to make pH value be 4-9; (c), uniformly mixing two solutions respectively obtained in step a and step b, using reducing agent to make reduction; and (d), adding setting agent into the mixed solution obtained in step c, filtering and drying so as to obtain the non-supported catalyst. Besides, in the step d, after a carrier is added, the settling agent is added further, filtered and dried so as to obtain the supported catalyst.

Description

technical field [0001] The invention relates to a supported and non-supported metal catalyst and a preparation method. Background technique [0002] A fuel cell is an electrochemical reaction device that directly converts the chemical energy of fuel and oxidant into electrical energy. Due to the characteristics of simple structure, high theoretical energy density, and environmental friendliness, fuel cells have broad application prospects in electric vehicle power supplies, decentralized power stations, and portable mobile power supplies. [0003] Catalyst is one of the key materials of fuel cells. Catalyst preparation methods usually include impregnation method, co-precipitation method, liquid phase reduction method, colloid method, electrochemical precipitation method, etc. These methods are still unable to control the particle size of the active component metal particles. size and crystal orientation. The size and crystal plane orientation of the active component partic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J23/38B01J21/06B01J23/16B01J23/14
Inventor 孙公权孙世国唐水花姜鲁华徐恒泳辛勤周冰
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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