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Ru-CeZrO as an Anode Catalyst for the Internal Reforming of Dimethyl Ether in Solid Oxide Fuel Cells. | LitMetric

Ru-CeZrO as an Anode Catalyst for the Internal Reforming of Dimethyl Ether in Solid Oxide Fuel Cells.

Nanomaterials (Basel)

Structural Integrity and Materials Reliability Centre (CIEFMA), Department of Materials Science and Engineering, EEBE-Campus Diagonal Besòs, Universitat Politècnica de Catalunya-BarcelonaTech, C/Eduard Maristany, 16, 08019 Barcelona, Spain.

Published: March 2024

AI Article Synopsis

  • The development of direct dimethyl ether (DME) solid oxide fuel cells (SOFCs) faces challenges due to low catalytic activity and carbon buildup from traditional Ni-zirconia-based anodes.
  • The study suggests using a 2.0 wt.% Ru-CeZrO (ruthenium-zirconium-doped ceria) anode catalyst layer (ACL) to improve performance, created through sol-gel synthesis and characterized by various advanced techniques.
  • Results show that the Ru-CZO ACL significantly enhances fuel cell performance by over 20% at 750 °C and demonstrates a strong resistance to carbon deposition, highlighting its potential as a catalyst for direct DME SOFCs.

Article Abstract

The development of direct dimethyl ether (DME) solid oxide fuel cells (SOFCs) has several drawbacks, due to the low catalytic activity and carbon deposition of conventional Ni-zirconia-based anodes. In the present study, the insertion of 2.0 wt.% Ru-CeZrO (ruthenium-zirconium-doped ceria, Ru-CZO) as an anode catalyst layer (ACL) is proposed to be a promising solution. For this purpose, the CZO powder was prepared by the sol-gel synthesis method, and subsequently, nanoparticles of Ru (1.0-2.0 wt.%) were synthesized by the impregnation method and calcination. The catalyst powder was characterized by BET-specific surface area, X-ray diffraction (XRD), field emission scanning electron microscopy with an energy-dispersive spectroscopy detector (FESEM-EDS), and transmission electron microscopy (TEM) techniques. Afterward, the catalytic activity of Ru-CZO catalyst was studied using DME partial oxidation. Finally, button anode-supported SOFCs with Ru-CZO ACL were prepared, depositing Ru-CZO onto the anode support and using an annealing process. The effect of ACL on the electrochemical performance of cells was investigated under a DME and air mixture at 750 °C. The results showed a high dispersion of Ru in the CZO solid solution, which provided a complete DME conversion and high yields of H and CO at 750 °C. As a result, 2.0 wt.% Ru-CZO ACL enhanced the cell performance by more than 20% at 750 °C. The post-test analysis of cells with ACL proved a remarkable resistance of Ru-CZO ACL to carbon deposition compared to the reference cell, evidencing the potential application of Ru-CZO as a catalyst as well as an ACL for direct DME SOFCs.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11013270PMC
http://dx.doi.org/10.3390/nano14070603DOI Listing

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