Enhanced stability of ammonia-fed protonic ceramic fuel cells via infiltration of Co–Fe catalyst

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy Pub Date : 2025-03-28 DOI:10.1016/j.ijhydene.2025.03.312

Haoliang Tao , Wenqiang Tang , Xueyan Zhao , Liangzhu Zhu

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Abstract

In this work, Co–Fe catalysts of different molar ratios are infiltrated into protonic ceramic fuel cell (PCFC) to improve the efficiency of ammonia cracking and cell stability. The degradation rate at 600 °C decreases by as high as 88 % under a current density of 625 mA cm⁻², proving the effectiveness of infiltrating Co–Fe catalysts. The postmortem analysis indicates that the infiltrated Co–Fe trends to accumulate to Ni particles in the anode and the synergism of Ni, Fe, and Co contributes to the improvement of structure integrity and cell stability in ammonia. We find that the structure evolution corresponding to cell degradation started from the regions near the anode functional layer and the separation of electrolyte grains could be regarded as the failure initiation for NH₃-fed PCFC. Both electrochemical stability test and the microstructural observation suggest that a decoration of Co to Fe ratio of 1:1 is more beneficial for NH₃-fed PCFC.

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来源期刊

International Journal of Hydrogen Energy 工程技术-环境科学

CiteScore

13.50

自引率

25.00%

发文量

3502

审稿时长

60 days

期刊介绍： The objective of the International Journal of Hydrogen Energy is to facilitate the exchange of new ideas, technological advancements, and research findings in the field of Hydrogen Energy among scientists and engineers worldwide. This journal showcases original research, both analytical and experimental, covering various aspects of Hydrogen Energy. These include production, storage, transmission, utilization, enabling technologies, environmental impact, economic considerations, and global perspectives on hydrogen and its carriers such as NH3, CH4, alcohols, etc. The utilization aspect encompasses various methods such as thermochemical (combustion), photochemical, electrochemical (fuel cells), and nuclear conversion of hydrogen, hydrogen isotopes, and hydrogen carriers into thermal, mechanical, and electrical energies. The applications of these energies can be found in transportation (including aerospace), industrial, commercial, and residential sectors.