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Formic acid fuel cell anode catalytic material

A formic acid fuel cell and catalytic material technology, applied in battery electrodes, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of changing the catalytic performance of Pd electrocatalysts, reducing the activity of palladium catalysts, etc. question

Inactive Publication Date: 2014-06-04
李文鹏 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the activity of palladium catalysts will gradually decrease with time, so people try to add other metals to palladium to change the catalytic performance of Pd electrocatalysts

Method used

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  • Formic acid fuel cell anode catalytic material
  • Formic acid fuel cell anode catalytic material
  • Formic acid fuel cell anode catalytic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Use a beaker to weigh 8 mg of activated carbon on an electronic balance, add 6.7 mL of distilled water, and then add 0.5 mL of absolute ethanol to reduce surface tension and prevent carbon powder from floating, and add palladium salt and chromium according to the palladium-chromium molar ratio of 7:3 Saline solution, then ultrasonically oscillate for more than 30 minutes, then add 10 μL of 0.2mol / L NaOH solution, adjust its pH value to about 10, and then add about 2mL of 5% NaBH 4 The solution was then stirred continuously for 15 minutes and left to stand overnight to obtain the precipitation of carbon-supported palladium-chromium alloy material (Pd-Cr / C). Filter the liquid containing Pd-Cr / C precipitate, wash the Pd-Cr / C precipitate several times with twice distilled water, and use AgNO 3 Check until the washing solution does not contain Cl- ions, then transfer the Pd-Cr / C material into a beaker and heat it on a hot plate. After it is slightly dry, transfer it to a vac...

Embodiment 2

[0015] Use a beaker to weigh 8 mg of activated carbon on an electronic balance, add 6.7 mL of distilled water, and then add 0.5 mL of absolute ethanol to reduce surface tension and prevent carbon powder from floating. Add palladium salt and chromium according to the molar ratio of palladium to chromium is 8:2 Saline solution, then ultrasonically oscillate for more than 30 minutes, then add 10 μL of 0.2mol / L NaOH solution, adjust its pH value to about 10, and then add about 2mL of 5% NaBH 4 The solution was then stirred continuously for 15 minutes and left to stand overnight to obtain the precipitation of carbon-supported palladium-chromium alloy material (Pd-Cr / C). Filter the liquid containing Pd-Cr / C precipitate, wash the Pd-Cr / C precipitate several times with twice distilled water, and use AgNO 3 Check until the washing solution does not contain Cl- ions, then transfer the Pd-Cr / C material into a beaker and heat it on a hot plate. After it is slightly dry, transfer it to a v...

Embodiment 3

[0017] Use a beaker to weigh 8 mg of activated carbon on an electronic balance, add 6.7 mL of distilled water, and then add 0.5 mL of absolute ethanol to reduce surface tension and prevent carbon powder from floating. Add palladium salt and chromium according to the molar ratio of palladium to chromium is 9:1 Saline solution, then ultrasonically oscillate for more than 30 minutes, then add 10 μL of 0.2mol / L NaOH solution, adjust its pH value to about 10, and then add about 2mL of 5% NaBH 4 The solution was then stirred continuously for 15 minutes and left to stand overnight to obtain the precipitation of carbon-supported palladium-chromium alloy material (Pd-Cr / C). Filter the liquid containing Pd-Cr / C precipitate, wash the Pd-Cr / C precipitate several times with twice distilled water, and use AgNO 3 Check until the wash solution is free of Cl - ions, and then transfer the Pd-Cr / C material into a beaker and heat it on a hot plate. , that is, get Pd 0.9 Cr 0.1 / C alloy cataly...

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Abstract

The invention discloses a formic acid fuel cell anode catalytic material and belongs to the field of inorganic functional materials. Carbon-loaded palladium chromium alloy catalysts with different Pd-Cr atomic ratios are prepared; the catalytic activity and the stability of the carbon-loaded palladium chromium alloy catalyst carrying out electrochemical oxidization on formic acid are higher than those of the carbon-loaded palladium catalyst, wherein the peak current of the carbon-loaded palladium chromium alloy catalyst with the atom amount ratio of palladium to chromium of 8:2 is about 2.8 times that of the Pd / C catalyst, and the oxidization spike potential ratio of the carbon-loaded palladium chromium alloy catalyst shifts negatively for 70mV compared with the oxidization spike potential ratio of the Pd / C catalyst. Therefore, the formic acid fuel cell anode catalytic material disclosed by the invention is beneficial to application to direct formic acid oxidization fuel cell anode catalytic materials.

Description

technical field [0001] The invention relates to an anode catalyst material of a formic acid fuel cell, which belongs to the field of inorganic functional materials. Background technique [0002] A fuel cell is a device that directly converts the chemical energy of fuel into electrical energy without burning. Its energy conversion is similar to that of an internal combustion engine. As long as the fuel is continuously supplied, the fuel cell can generate electricity continuously. Unlike the internal combustion engine, the fuel cell is not limited by the Carnot cycle, and can directly convert the chemical energy of the fuel into electrical energy, so the energy conversion efficiency is high, and there is no pollution and noise. Direct formic acid fuel cells (DFAFCs) that can be used at room temperature can be used as clean energy for pocket electronics. In DFAFCs, formic acid is oxidized at the anode as a fuel, and in the past few decades, platinum-based electrocatalysts have...

Claims

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Application Information

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IPC IPC(8): H01M4/92B01J23/652
CPCY02E60/50B01J23/6522H01M4/921H01M4/926
Inventor 李文鹏温文娟
Owner 李文鹏
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