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A New Pd Doped Proton Conducting Perovskite Oxide with Multiple Functionalities for Efficient and Stable Power Generation from Ammonia at Reduced Temperatures.
- Source :
- Advanced Energy Materials; 5/20/2021, Vol. 11 Issue 19, p1-10, 10p
- Publication Year :
- 2021
-
Abstract
- The combination of ammonia fuel and proton-conducting fuel cells (PCFCs) technology may provide an ideal clean energy system for the future, considering matured NH<subscript>3</subscript> synthesis technology and transportation and storage infrastructure, the high energy density of NH<subscript>3</subscript>, and the high efficiency of fuel cells. However, poor catalytic activity of the anode for NH<subscript>3</subscript> decomposition, quick performance degradation due to the ammonia induced nickel coarsening, difficult sintering, and insufficient proton conductivity of electrolytes are the main challenges for stable and high-power generation from ammonia-fueled PCFCs. Herein, a new Ba(Zr<subscript>0.1</subscript>Ce<subscript>0.7</subscript>Y<subscript>0.1</subscript>Yb<subscript>0.1</subscript>)<subscript>0.95</subscript>Pd<subscript>0.05</subscript>O<subscript>3-δ</subscript> perovskite is reported as a key anode component and electrolyte, which demonstrates multifunctionalities and tackles most challenges of conventional PCFCs. The incorporation of a small amount of Pd boosts catalytic activity of the nickel-perovskite cermet anode for NH<subscript>3</subscript> decomposition and increases proton conductivity from the creation of B-site cation deficiency and electrolyte sintering. The corresponding thin-film electrolyte PCFC delivers a maximum power density of 724 mW cm<superscript>-2</superscript> at 650 °C operated on NH<subscript>3</subscript>, much higher than the similar cell without Pd incorporation (450 mW cm<superscript>-2</superscript>). Furthermore, no apparent performance decay is observed for the cell operated at 550 °C in H<subscript>2</subscript> and NH<subscript>3</subscript> for 350 h, making it highly promising for practical applications. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 16146832
- Volume :
- 11
- Issue :
- 19
- Database :
- Complementary Index
- Journal :
- Advanced Energy Materials
- Publication Type :
- Academic Journal
- Accession number :
- 151027913
- Full Text :
- https://doi.org/10.1002/aenm.202003916