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Conflict of Interest
In relation to this article, we declare that there is no conflict of interest.
Publication history
Received June 4, 2024
Revised June 27, 2024
Accepted July 16, 2024
Available online January 1, 1970
articles This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Effect of Catalyst Ink Properties on the Performance of Proton Exchange Membrane Fuel Cell and Water Electrolyzer: A Mini Review

Hydrogen Energy Research Center, Korea Research Institute of Chemical Technology 1Program in Environmental and Polymer Engineering, Department of Polymer Science and Engineering, Inha University 2Department of Chemical Engineering, Hanyang University
khoh@krict.re.kr
Korean Journal of Chemical Engineering, December 2025, 42(14), 3459-3470(12)
https://doi.org/10.1007/s11814-024-00221-2

Abstract

The usual way to create the catalyst layer in electrochemical energy conversion cells involves combining catalyst, ionomer

dispersion, and solvents. When this ink dispersion is processed, the resulting microstructure and rheological properties of the

catalyst ink are influenced by the components composition and how they interact each other. Once the catalyst ink is dried,

it forms the microstructure of the catalyst layer (CL), which includes agglomerates and pores that can impact the catalyst

activity and the mass transport performance. As a result, examining the correlation between the catalyst ink characteristics

and the CL structure is highly valuable. Recently, numerous studies have explored the relationship among the rheological

properties of the catalyst ink, the structure of the CL, and the performance of the cell. In this review, we examine how the

composition and rheological properties of the catalyst ink influence cell performance and compare the findings of these

studies to provide insights into creating high-performance catalyst ink.

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