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Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance

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Published on: April 27, 2018

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

Heon Jun Jeong¹, Wanhyuk Chang¹, Beum Geun Seo¹

¹School of Mechanical Engineering, Korea University, Seoul, 02841, South Korea.

Small (Weinheim an Der Bergstrasse, Germany)

|March 3, 2023

Summary

This summary is machine-generated.

This study enhances protonic ceramic fuel cells (PCFCs) for ammonia fuel by using palladium catalysts. This boosts performance and durability, offering a promising solution for efficient energy conversion.

Keywords:

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

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Area of Science:

Materials Science
Electrochemistry
Energy Conversion

Background:

Protonic ceramic fuel cells (PCFCs) offer potential for clean energy but face challenges with ammonia fuel at lower temperatures.
Ammonia decomposition is a key factor limiting PCFC performance in such environments.

Purpose of the Study:

To improve the performance and durability of PCFCs operating with ammonia fuel injection.
To investigate the effect of palladium (Pd) catalyst treatment on PCFCs at lower operating temperatures.

Main Methods:

Atomic layer deposition (ALD) was used to apply a palladium (Pd) catalyst to the anode surface of PCFCs.
The anode material consisted of nickel oxide (NiO) and BaZr_0.2 Ce_0.6 Y_0.1 Yb_0.1 O_3-δ (BZCYYb).
Performance was evaluated via power density measurements and impedance analysis at approximately 500 °C.

Main Results:

Pd-treated PCFCs achieved a peak power density of 340 mW cm^-2 at 500 °C, approximately double that of untreated samples.
Pd catalyst significantly reduced polarization resistance, especially at lower temperatures, by enhancing current collection.
Stability tests demonstrated superior durability for the Pd-treated PCFCs compared to bare samples.

Conclusions:

Palladium catalyst treatment is an effective strategy to enhance the performance and durability of PCFCs using ammonia fuel.
The ALD post-treatment method facilitates Pd penetration into the anode, improving electrochemical reactions.
This approach presents a viable pathway for developing high-performance, stable PCFCs for ammonia-based energy applications.