(598e) Preparation of Multifunctional Carbon-Supported Irru Catalyst By Novel Acidic Polyol Procedure for Fuel Cell Application

Fuel cell systems have recently attracted attention as eco-friendly devices that can be applied to eco-friendly power trains for fuel cell electric vehicles and to combined heat and power generation, which is considered the important measures to the hydrogen society [1,2]. Among them, proton exchange membrane electrolyte membrane fuel cells (PEMFCs) have been mostly developed due to their possibility of ambient operation and high efficiency under the 100℃. In addition, the improvement of anion exchange membrane fuel cells (AEMFCs) has been remarkable along with the enhancement of the membrane performance during recent years [3]. These fuel cells are based on two basic electrochemical reactions such as hydrogen oxidation reaction (HOR) and the oxygen reduction reaction (ORR). To date, much research has been focused on searching the new ORR catalyst to increase the activity of the catalyst and to reduce the cost of the fuel cell systems. In the other hand, novel HOR catalysts is also demanded to be developed to address the issues from the Pt catalyst for PEMFC and AEMFC. For example, the Pt/C catalyst is very vulnerable under the fuel starvation situations that can occur during FCEV operation, which used the PEMFC system. In addition, in the case of AEMFC, it is known that the HOR activity of the Pt/C catalyst is drastically reduced.

In this presentation, as a universal HOR catalyst under acidic and alkaline, the carbon-supported IrRu alloy catalysts will be introduced. Recently, the IrRu alloy catalyst has been developed for replacing the Pt catalyst in the anode of the automotive PEMFC [4-6]. As a continuous study, the carbon-supported IrRu alloy catalysts with different ratios of Ir and Ru were prepared by polyol process under acidic condition (pH < 7) for the first time and investigated as the universal HOR catalysts under acidic and alkaline condition. The performance of the IrRu alloy catalysts in the single-cell level will be discussed.

[1] R.-H. Lin, Y.-Y. Zhao, B.-D. Wu, Int. H. Hydrogen Energy, in press (2020), doi.org/10.1016/ j.ijhydene.2020.01.047

[2] The Fuel Cell Industry Review 2019 at www.FuelCellIndustryReview.com, E4Tech, (2019).

[3] D. R. Dekel, J. Power Sources, 375, 158 (2018).

[4] E. You, M. Min, S.-A. Jin, T. Kim, C. Pak, J. Electrochem. Soc. 165, F3094 (2018).

[5] S. W. Lee, B. H. Lee, T.-Y. Kim, C. Baik, M. S. Kim, G. S. Chai, C. Pak, Catal. Commun. 130, 105758 (2019).

[6] T.-Y. Kim, S. W. Lee, C. Pak, J. Ind. Eng. Chem. 85, 87 (2020).