Catalyst for direct methanoic acid fuel cell and method for producing the same

A formic acid fuel cell and catalyst technology, applied in the field of electrochemistry, can solve the problems of poor catalytic stability, low activity, low utilization rate of precious metals, etc., and achieve the effect of long-lasting catalytic stability and good catalytic performance

Inactive Publication Date: 2008-09-24
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] According to the characteristics of a single Pd catalyst being easily oxidized, aiming at its low activity, low utilization rate of precious metals, poor catalytic stability and other problems

Method used

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  • Catalyst for direct methanoic acid fuel cell and method for producing the same
  • Catalyst for direct methanoic acid fuel cell and method for producing the same
  • Catalyst for direct methanoic acid fuel cell and method for producing the same

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Take 15mL of deionized water in a three-necked flask, add 100-800mg of sodium citrate into it, ultrasonically disperse for 0.5h, and after fully dissolved, drop in PdCl containing 0.047mol / L under the condition of stirring 2 With 0.25mol / L NH 4 Cl solution 5mL, use ammonia water to adjust the pH value of the mixed solution to 3~9, after the Pd ions are fully complexed, add dry pretreated XC-72 activated carbon 100mg into the three-necked flask, and disperse by ultrasonic vibration for 0.5h, Afterwards, strengthen the stirring for 0.5h, so that the Pd complex is evenly dispersed on the surface of the carbon, and the raw carbon slurry is obtained. During the dispersion and stirring process, high-purity Ar gas is introduced to remove the dissolved oxygen until the subsequent reduction reaction is completed.

[0034] Dissolve 0.04-0.2g of trimethylammoniaborane in 10mL of deionized water, and add it to the carbon slurry drop by drop using a dropping funnel. The dropping tim...

Embodiment 2

[0037] Take 20mL of deionized water in a three-necked flask, add 200-1000mg of sodium citrate into it, ultrasonically disperse for 0.5h, and after fully dissolved, drop in PdCl containing 0.047mol / L under stirring conditions 2 With 7.5mL of 0.25mol / L NaCl solution, use ammonia water to adjust the pH value of the mixed solution to 3-9, so that Pd ions are fully complexed, add dry pretreated XC-72 activated carbon 100mg into the three-necked flask After uniform dispersion, the raw carbon slurry is obtained. During the process of dispersion and stirring, high-purity Ar gas is introduced to remove dissolved oxygen until the subsequent reduction reaction is completed.

[0038] Dissolve 0.06-0.3g of dimethylammonia borane in 15mL of deionized water, and add it to the carbon slurry drop by drop using a dropping funnel. The dropping time is 0.5-2h. The temperature is 0-80°C, and the subsequent reduction time is 0.5-8h. until the Pd is fully reduced.

[0039] After the reduction proc...

Embodiment 3

[0041] Take 15mL of deionized water, add 40-250mg of sodium fluoride and 200-400mg of boric acid into it, ultrasonically disperse for 0.5h-1h, and after fully dissolved, drop in PdCl containing 0.047mol / L under stirring conditions 2 Add 5mL of 0.25mol / L NaCl solution, use ammonia water to adjust the pH value of the mixture to 3-10, after the Pd ions are fully complexed, add XC-72 activated carbon 100mg, disperse by ultrasonic oscillation for 0.5h, and then strengthen stirring for 0.5 h, the Pd complex is uniformly dispersed on the carbon surface to obtain the raw carbon slurry. During the dispersion and stirring process, high-purity Ar gas is introduced to remove the dissolved oxygen until the subsequent reduction reaction is completed.

[0042] Dissolve 0.04~0.2g of dimethylammoniaborane in 10mL of deionized water, and add it dropwise into the carbon slurry using a dropping funnel. The dropping time is 0.5~2h. The temperature is 0-80°C, and the subsequent reduction time is 0....

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Abstract

The invention belongs to the field of electrochemical technology, in particular relates to a catalyst directly used by a methanol fuel cell and a preparation method thereof. The catalyst is carbon-loaded palladium boron alloy: Pd-B / C, wherein, Pd accounts for 1 to 60 percent of the mass of the loaded catalyst; in the alloy, the atomic ratio of Pd to B is 10 to 0.01 to 10: 5; a central granule ranges from 1.5 nanometers to 50 nanometers. The preparation method includes the steps of making raw materials of coal slurry, adding a reducing agent for reducing and after treatment. The method of the invention is convenient and has high efficiency as well as high yield. The catalyst has higher reactivity and high reliability compared with the traditional Pd / C catalyst in the anode catalyst process of a formic acid fuel cell.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and in particular relates to a catalyst used in a direct formic acid fuel cell and a preparation method thereof. technical background [0002] A fuel cell is a device that directly converts chemical energy into electrical energy isothermally and electrochemically. As a new generation of energy technology after hydropower, thermal power and nuclear power generation, the fuel cell does not go through the heat engine process, so it is not limited by the Carnot cycle, the energy conversion efficiency is high (40%-60%), and the actual use efficiency is higher than that of ordinary internal combustion engines. 2 to 3 times of that; system efficiency is less affected by load and capacity; no noise, almost no harmful gas emissions; in the case of continuous fuel supply, it can continue to work, and has high power density and stable output; easy to use , safe operation. It is for the above reas...

Claims

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Application Information

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IPC IPC(8): B01J23/44B01J21/02H01M4/92
CPCY02E60/50
Inventor 蔡文斌王金意王超彭斌
Owner FUDAN UNIV
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