A method for determining proton exchange film fuel cell film electrode platinum loading

A fuel cell membrane and proton exchange membrane technology, applied in the field of platinum load analysis, can solve the problem of not providing a sample processing method, and achieve the effects of small analysis error, large sample weighing and high accuracy

Active Publication Date: 2007-10-17
SUNRISE POWER CO LTD
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But this patent does not provide sample processing method

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  • A method for determining proton exchange film fuel cell film electrode platinum loading
  • A method for determining proton exchange film fuel cell film electrode platinum loading

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Embodiment 1

[0032] 1. Sample Processing

[0033] (1) Sampling: Take a piece of undamaged and dry MEA of about 1g, accurately measure its size and mass, carefully cut it into pieces with scissors, and then completely transfer it to a corundum crucible. Sample size measurement must be accurate as it is closely related to calculating the theoretical platinum content of the sample.

[0034] (2) Sample carbonization and ashing: Put the crucible with the MEA on the lid and put it into the muffle furnace, pay attention to the ventilation of the muffle furnace. First carbonize at 400°C for 2 hours. Then it is ashed at 900°C for more than 12 hours. Fully ash the carbon in the MEA sample. After fully ashing, there is only a little residue left on the bottom of the crucible, and its surface is off-white, which adheres to the bottom of the crucible in the form of dry powder.

[0035](3) Sample nitration: after the ashed sample is cooled to room temperature, wet the dry powder with a small amount ...

Embodiment 2

[0048] Take two undamaged and dry MEAs of about 1g, measure their size and mass accurately, cut them carefully with scissors, and then transfer them completely to a corundum crucible. Sample size measurement must be accurate as it is closely related to calculating the theoretical platinum content of the sample. Cover the crucible with the MEA and put it into the muffle furnace, pay attention to the ventilation of the muffle furnace. First carbonize at 400°C for 2 hours. Then, it was ashed at 900° C. for 12 hours to fully ash the carbon in the MEA sample. After fully ashing, there is only a little residue left on the bottom of the crucible, and its surface is off-white, which adheres to the bottom of the crucible in the form of dry powder. After the ashed sample is cooled to room temperature, wet the dry powder with a small amount of water, then slowly add an appropriate amount of concentrated sulfuric acid and concentrated nitric acid (volume ratio 1:1) along the crucible wa...

Embodiment 3

[0052] Take two undamaged and dry single electrodes of about 1g (either anode or cathode), accurately measure their size and mass, carefully cut them into pieces with scissors, and then completely transfer them to a corundum crucible. Sample size measurement must be accurate as it is closely related to calculating the theoretical platinum content of the sample. Cover the crucible with the MEA and put it into the muffle furnace, pay attention to the ventilation of the muffle furnace. First carbonize at 400°C for 2 hours. Then, it was ashed at 900° C. for 12 hours to fully ash the carbon in the MEA sample. After fully ashing, there is only a little residue left on the bottom of the crucible, and its surface is off-white, which adheres to the bottom of the crucible in the form of dry powder. After the ashed sample is cooled to room temperature, wet the dry powder with a small amount of water, then slowly add an appropriate amount of concentrated sulfuric acid and concentrated n...

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Abstract

The invention relates to proton exchanging film fuel cell membrane electrode platinum loading analysis, concretely to a measuring method for proton exchanging film fuel cell membrane electrode platinum loading. The method includes steps: 1) accurately measuring size and quality of a MEA sample, heating the MEA sample to adequately incinerate carbon in the MEA sample, after cooling, adding thick sulfuric acid and thick nitric acid to the sample, and heating solution to completely dissolve platinum; 2) adding water to scale to prepare measured sample solution; 3) measuring platinum content in the solution by inductance coupling plasma atom emission spectroscopy method, calculating membrane electrode platinum loading in MEA sample. The invention obtains measured sample by an MEA direct treatment method, uses an ICP-AES analysis method which has high sensitivity, high accuracy, fast process, simple operation and good feasibility to measure platinum content, and estimates MEA which is key material of PEMFC.

Description

technical field [0001] The present invention relates to the core part of proton exchange membrane fuel cell (PEMFC) - the analysis of the platinum load of membrane electrode assembly (Membrane Electrode Assembly, MEA) catalyst layer, specifically a kind of platinum load of membrane electrode of proton exchange membrane fuel cell method of measurement. The aim is to establish an accurate, convenient and fast membrane electrode treatment and platinum loading test method to analyze and evaluate the key material of PEMFC - MEA. Background technique [0002] Platinum catalysts are widely used in the field of fuel cells as transition metal catalysts. In proton exchange membrane fuel cells (PEMFC), the membrane electrode assembly (MEA) is the core part of the entire battery. At present, most of the catalytic layers in MEA use platinum as the catalyst. Most platinum catalysts in MEA are supported catalysts. These supported ultrafine platinum catalysts have the characteristics of s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/73G01N1/28
Inventor 景粉宁俞红梅侯明明平文
Owner SUNRISE POWER CO LTD
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