High-Performing and Stable Membrane Electrode Assemblies Based on Fluorine-Doped Tin Oxide Catalysts
4 affiliations
- 1University of Porto , , Rua Dr. Roberto Frias , ,
- 2German Aerospace Center (DLR) , , Pfaffenwaldring 38-40 , ,
- 3Carbon Science and Technology Institute, INCAR-CSIC Francisco Pintado Fe 26 , ,
- 4Clean Energy Cluster, International Iberian Nanotechnology Laboratory , Av. Mestre José Veiga , ,
Abstract
To improve the iridium utilization on proton exchange membrane water electrolysers (PEMWEs), a new support based on fluorine-doped tin oxide (FTO) nanoparticles was developed, characterized, and assessed for the anode side. This approach utilizes a sol–gel method combined with a 500 °C annealing treatment to promote favorable metal–support interactions and contribute to catalyst stability. The resulting IrOx/FTO catalyst exhibits remarkable performance at a low Ir loading of 0.5 mgIr cm–2, corresponding to half the loading of the commercial IrO2 reference. The membrane electrode assembly (MEA) incorporating the FTO-based anode outperformed the electrolyzer employing commercial IrO2, reaching 1.35 A cm–2 at 2 V and 60 °C compared with 0.9 A cm–2 for the commercial catalyst. Moreover, these catalysts demonstrated excellent operational stability, with no significant activity decline during more than 300 h of continuous operation at 1.3 A cm–2 and 80 °C. These findings pave the way for innovative and cost-effective membrane electrode assemblies with enhanced stability.
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BibTeX
@article{delgado2026highperforming,
title = {{High-Performing and Stable Membrane Electrode Assemblies Based on Fluorine-Doped Tin Oxide Catalysts}},
author = {Sofia Delgado and Vincent Wilke and Rita Marques and Jonathan Ruiz Esquius and Aldo Gago and Fátima Santos and Andreas Friedrich and Adélio Mendes},
journal = {ACS Omega},
year = {2026},
month = oct,
doi = {10.1021/acsomega.6c08923},
url = {https://pubs.acs.org/acsodf/article/doi/10.1021/acsomega.6c08923/5461307/High-Performing-and-Stable-Membrane-Electrode},
note = {CC BY-NC-ND 4.0},
}
RIS
TY - JOUR
TI - High-Performing and Stable Membrane Electrode Assemblies Based on Fluorine-Doped Tin Oxide Catalysts
AU - Sofia Delgado
AU - Vincent Wilke
AU - Rita Marques
AU - Jonathan Ruiz Esquius
AU - Aldo Gago
AU - Fátima Santos
AU - Andreas Friedrich
AU - Adélio Mendes
PY - 2026
DA - 2026/10/30
JO - ACS Omega
DO - 10.1021/acsomega.6c08923
UR - https://pubs.acs.org/acsodf/article/doi/10.1021/acsomega.6c08923/5461307/High-Performing-and-Stable-Membrane-Electrode
AB - To improve the iridium utilization on proton exchange membrane water electrolysers (PEMWEs), a new support based on fluorine-doped tin oxide (FTO) nanoparticles was developed, characterized, and assessed for the anode side. This approach utilizes a sol–gel method combined with a 500 °C annealing treatment to promote favorable metal–support interactions and contribute to catalyst stability. The resulting IrOx/FTO catalyst exhibits remarkable performance at a low Ir loading of 0.5 mgIr cm–2, corresponding to half the loading of the commercial IrO2 reference. The membrane electrode assembly (MEA) incorporating the FTO-based anode outperformed the electrolyzer employing commercial IrO2, reaching 1.35 A cm–2 at 2 V and 60 °C compared with 0.9 A cm–2 for the commercial catalyst. Moreover, these catalysts demonstrated excellent operational stability, with no significant activity decline during more than 300 h of continuous operation at 1.3 A cm–2 and 80 °C. These findings pave the way for innovative and cost-effective membrane electrode assemblies with enhanced stability.
SN - 2470-1343
ER -