In-situ XAFS (X-ray absorption fine structure) fuel cell, system and method for catalyst experiments

Abstract

The invention provides an in-situ XAFS (X-ray absorption fine structure) fuel cell, a system and a method for catalyst experiments. The in-situ XAFS fuel cell for the catalyst experiments comprises a support plate, a film electrode assembly, a top cover plate, an anode flow field plate and a cathode flow field plate. A first through hole is formed in the middle of the support plate, a second through hole is formed in the middle of the top cover plate, a third through hole is formed in the middle of the anode flow field plate, and a first film is fixed to the periphery of the third through hole and covers the third through hole; a fourth through hole is formed in the middle of the cathode flow field plate, and a second film is fixed to the periphery of the fourth through hole and covers the fourth through hole; the first film and the second film are made of materials which do not absorb X-rays. The in-situ XAFS fuel cell, the system and the method for the catalyst experiments have the advantages that experimental data can be acquired in perspective modes and fluorescent modes, the working temperatures of the in-situ XAFS fuel cell can be adjusted, the in-situ XAFS fuel cell, the system and the method are low in cost, the signal-noise ratios of acquired spectra can be greatly increased, and the in-situ XAFS fuel cell and the system are good in sealing performance and water resistance.

Description

technical field [0001] The invention relates to the field of experimental equipment, in particular to an in-situ XAFS fuel cell, system and method for catalyst experiments. Background technique [0002] X-ray absorption spectrum is an important means to study the structure of matter, and can obtain structural parameters such as the type, quantity and distance of the coordination atoms in the coordination layer around the absorbing atoms. Although there have been many reports on the use of in situ X-ray absorption spectroscopy to study the properties of catalysts, there are not many reports on the in situ study of catalyst surface oxidation states. Because these data must be obtained under the condition that the fuel cell works normally. In 2001, X-ray absorption spectrum and X-ray diffraction methods were used for the first time to try to carry out in-situ research on fuel cell catalysts, but the research method was limited to collecting data in fluorescence mode. For catal...

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Problems solved by technology

In 2001, X-ray absorption spectrum and X-ray diffraction methods were used for the first time to try to carry out in-situ research on fuel cell catalysts, but the research method was limited to collecting data in fluorescence mode. For catalyst samples with high element content, transmission mode related data could not be obtained. Moreover, the design of the experimental device has certain limitations, and the signal-to-noise ratio of the obtained fluorescent signal is poor.

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