Synchrotron radiation in-situ testing device for catalysts in the catalytic layer of fuel cells

Abstract

The invention provides a synchrotron radiation in-situ test device for a catalyst in a fuel cell catalyst layer. The synchrotron radiation in-situ test device comprises a synchrotron radiation light source (1), a front ionization chamber, an in-situ cell and a rear ionization chamber or a fluorescent detector (7), wherein X rays emit from the synchrotron radiation light source (1) and emit onto the rear ionization chamber or the fluorescent detector (7) via the front ionization chamber and the in-situ cell. The in-situ cell comprises working electrode sides and auxiliary electrode sides; and the working electrode side is connected with the auxiliary electrode side by virtue of a through-hole mechanism and a connecting piece (15). The synchrotron radiation in-situ test device for the catalyst in the fuel cell catalyst layer provided by the invention is applicable to the electrocatalytic reaction in-situ cell for in-situ synchrotron radiation XAFS detection, so that a key technical problem of real-time detection of structural evolution of the catalyst is realized.

Description

technical field [0001] The present invention relates, in particular, to a synchrotron radiation in-situ testing device for catalysts in a fuel cell catalytic layer, in particular to a synchrotron radiation in-situ testing device for catalysts in a fuel cell catalytic layer under a certain potential. Background technique [0002] A proton exchange membrane fuel cell consists of a cathode catalytic layer, a proton exchange membrane, and an anode catalytic layer. The catalytic layer is the core component in the electrocatalytic reaction, and its composition and microstructure directly affect the activity of the electrocatalytic reaction and energy conversion efficiency. In the process of electrocatalytic reaction, researchers usually use rotating disk electrode cyclic voltammetry, linear voltammetry scanning method and AC impedance method to characterize the catalytic activity and stability of the catalyst, combined with off-line transmission electron microscope, X-ray diffracti...

AI Technical Summary

Problems solved by technology

Off-line analysis methods are difficult to capture the real-time structural changes of catalysts during the catalytic reaction process, so that they cannot truly reflect the mechanism of action of catalysts, and thus cannot effectively provide reliable theoretical support for the design of catalysts with both activity and stability

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