High-Performance Ammonia Protonic Ceramic Fuel Cells Using a Pd Inter-Catalyst

Heon Jun Jeong, Wanhyuk Chang, Beum Geun Seo, Yun Sung Choi, Keun Hee Kim, Dong Hwan Kim, Joon Hyung Shim

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

This study reports the performance and durability of a protonic ceramic fuel cells (PCFCs) in an ammonia fuel injection environment. The low ammonia decomposition rate in PCFCs with lower operating temperatures is improved relative to that of solid oxide fuel cells by treatment with a catalyst. By treating the anode of the PCFCs with a palladium (Pd) catalyst at 500 °C under ammonia fuel injection, the performance (peak power density of 340 mW cm−2 at 500 °C) is approximately two-fold higher than that of the bare sample not treated with Pd. Pd catalysts are deposited through an atomic layer deposition post-treatment process on the anode surface, in which nickel oxide (NiO) and BaZr0.2Ce0.6Y0.1Yb0.1O3–δ (BZCYYb) are mixed, and Pd can penetrate the anode surface and porous interior. Impedance analysis confirmed that Pd increased the current collection and significantly reduced the polarization resistance, particularly in the low-temperature region (≈500 °C), thereby improving the performance. Furthermore, stability tests showed that superior durability is achieved compared with that of the bare sample. Based on these results, the method presented herein is expected to represent a promising solution for securing high-performance and stable PCFCs based on ammonia injection.

Original languageEnglish
Article number2208149
JournalSmall
Volume19
Issue number22
DOIs
Publication statusPublished - 2023 Jun 1

Bibliographical note

Funding Information:
This work was supported by a National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIT) (No. NRF‐2019R1A2C2003054). This research was also supported by the Program of Future Hydrogen Original Technology Development (2021M3I3A1084842) through the National Research Foundation of Korea (NRF), funded by the Korean government [Ministry of Science and ICT (MSIT)].

Publisher Copyright:
© 2023 Wiley-VCH GmbH.

Keywords

  • ammonia fuel
  • atomic layer deposition
  • catalysts
  • decomposition
  • palladium
  • protonic ceramic fuel cells

ASJC Scopus subject areas

  • Engineering (miscellaneous)
  • General Chemistry
  • General Materials Science
  • Biotechnology
  • Biomaterials

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