Method for measuring adsorption capacity of ionic polymer on surface of noble metal in catalyst layer and application

By combining chemical displacement labeling with differential elution kinetics analysis, the problem of non-destructive quantitative measurement of the adsorption amount of ionic polymers on the surface of noble metals in the catalyst layer was solved, providing a non-destructive and low-cost measurement method to guide the optimization of the catalyst layer.

CN121994561APending Publication Date: 2026-05-08TSINGHUA UNIVERSITY
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Patent Information

Application Number
CN202610129728.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-01-30
Publication Date
2026-05-08

AI Technical Summary

Technical Problem

Existing technologies cannot achieve non-destructive and quantitative analysis of the amount of ion polymer adsorption on the surface of noble metals in the catalyst layer. Existing methods are costly or suffer from signal ambiguity and difficulty in decoupling.

Method used

By using chemical displacement labeling and elution kinetic differential analysis, and taking advantage of the difference in adsorption intensity of labeled ionic polymers on noble metal and inert support surfaces, combined with the comparison of pseudo-catalytic layers, non-destructive quantitative measurement of ionic polymers on noble metal surfaces can be achieved.

Benefits of technology

It enables non-destructive and specific quantitative measurement of ionic polymers on noble metal surfaces, reduces costs, has wide applicability, provides key parameters for optimizing catalyst layer structure, and guides the improvement of electrode performance.

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Abstract

The invention provides a method for measuring the adsorption capacity of an ionic polymer on the surface of noble metal in a catalyst layer. The method comprises the following steps: quantitatively replacing protons in the ionic polymer with selected metal cations for marking; respectively preparing a catalyst layer containing a noble metal catalyst and a pseudo catalyst layer not containing noble metal by utilizing the marked ionic polymer; measuring the initial load of noble metals, ionic polymers and selected metal cations in the catalyst layer and the pseudo catalyst layer; respectively carrying out soaking and elution experiments on the catalyst layer and the pseudo catalyst layer, monitoring the residual load of selected metal cations, and carrying out normalization processing; respectively drawing normalized elution kinetic curves of the catalyst layer and the pseudo catalyst layer; and comparing and analyzing the two curves, and calculating the amount of the ionic polymer specifically adsorbed on the surface of the noble metal by using a linear extrapolation method. The method realizes lossless and specific quantitative characterization of the metal-ionic polymer interface adsorption capacity, and has the advantages of clear principle, low equipment threshold and accurate result.
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