Oxygen Reduction Reaction Activity and Stability of Shaped Metal-Doped PtNi Electrocatalysts Evaluated in Gas Diffusion Electrode Half-Cells

Polani S, Amitrano R, Baumunk A, Pan L, Lu J, Schmitt N, Gernert U, Klingenhof M, Selve S, Günther CM, Etzold B, Strasser P

Publication Type: Journal article

Journal

ACS Applied Materials and Interfaces American Chemical Society

DOI: 10.1021/acsami.4c11068

Abstract

The synthesis of bimetallic and trimetallic platinum-based octahedral catalysts for the cathode of proton exchange membrane fuel cells (PEMFCs) is a particularly active area aimed at meeting technological requirements in terms of durability and cost. The electrocatalytic activity and stability of these shaped catalysts were tested at relatively high potentials (@0.9 V vs RHE) and at lower current densities using the rotating disk electrode, which is less suitable for assessing their behavior under the operating conditions of PEMFCs. In this work, we use a gas diffusion electrode (GDE) half-cell setup to test the performance of the catalysts under application-oriented conditions, relatively higher current densities, and a square-wave stability test. After the stability test, we analyzed the GDE catalytic layer to study the agglomeration and dissolution of the transition metal under these conditions by using high-resolution scanning electron microscopy and energy-dispersive X-ray spectroscopy. The present results provide valuable guidance for developing next-generation active and durable catalysts for PEMFCs.

Authors with CRIS profile

Adrian Baumunk Lehrstuhl für Power-to-X-Technologien Bastian Etzold Lehrstuhl für Power-to-X-Technologien

Involved external institutions

Technische Universität Berlin DE Germany (DE) Technische Universität Darmstadt DE Germany (DE)

How to cite

APA:

Polani, S., Amitrano, R., Baumunk, A., Pan, L., Lu, J., Schmitt, N.,... Strasser, P. (2024). Oxygen Reduction Reaction Activity and Stability of Shaped Metal-Doped PtNi Electrocatalysts Evaluated in Gas Diffusion Electrode Half-Cells. ACS Applied Materials and Interfaces. https://doi.org/10.1021/acsami.4c11068

MLA:

Polani, Shlomi, et al. "Oxygen Reduction Reaction Activity and Stability of Shaped Metal-Doped PtNi Electrocatalysts Evaluated in Gas Diffusion Electrode Half-Cells." ACS Applied Materials and Interfaces (2024).

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