氫能為零碳排放之潔淨能源載體，惟儲運成本高昂而限制其普及。氨具備優異之體積氫密度與溫和之液化條件，為極具潛力之氫能轉運媒介。質子傳導陶瓷燃料電池（Proton Ceramic Fuel Cell， PCFC）可於陽極直接進行氨之裂解與電化學氧化，且水於陰極生成而不稀釋燃料，理論效率優於傳統氧離子傳導型固態氧化物燃料電池，為直接氨燃料發電之理想平台，然而，現有Ni基陽極於中低溫之氨裂解活性不足，制約其發展。 本研究採用浸漬法結合雷射脈衝鹽類合成法（Pulsed-laser metal-salt processing， PLMS），於BCZYYb（BaCe0.7Zr0.1Y0.1Yb0.1O3−δ）陽極基板上原位合成一系列高分散之 Fe-Co-Ni過渡金屬合金觸媒，探討觸媒附載量與組成對氨分解活性及電池性能之影響。 在氨分解催化活性方面，經優化確立2.5 wt%為最佳附載量，於組成比較中，Fe3Co3Ni94-BCZYYb展現最佳活性，於575 °C達 99.8%，為所有組成中最早接近完全轉化者。此優異活性推測係因少量Fe、Co之導入，在調整表面吸附特性與保留 Ni 連續活性網路之間取得良好平衡。 於單電池方面，Fe3Co3Ni94-BCZYYb之最大功率密度與阻抗表現均優於未改質之 Ni-BCZYYb。於700 °C、氨燃料下達1319 mW cm-2（Ni-BCZYYb為808 mW cm-2），且因具較佳之氨分解活性，於中低溫可維持較高之氫供應與功率輸出，525 °C下之MPD（424 mW cm-2）約為 Ni-BCZYYb（284 mW cm-2）之1.5 倍。於550 °C、氨燃料之12 小時穩定性測試中，其電壓衰退率約8.6%，低於未改質之13.6%，顯示改質電池兼具較佳之氨燃料性能與運轉穩定性。 本研究以浸漬結合PLMS原位合成高分散Fe-Co-Ni合金觸媒，釐清附載量與組成對氨分解活性及電池性能之影響，為直接氨燃料 PCFC 之陽極設計提供依據，有望推動氨作為無碳氫能載體之實用化，助力潔淨能源轉換與資源永續。;Hydrogen is a clean， zero-carbon-emission energy carrier， but its high storage and transportation costs limit its widespread adoption. Ammonia， possessing excellent volumetric hydrogen density and mild liquefaction conditions， serves as a highly promising medium for hydrogen transport. Proton Ceramic Fuel Cells (PCFCs) can directly perform ammonia decomposition and electrochemical oxidation at the anode. Furthermore， water is generated at the cathode without diluting the fuel， yielding a theoretical efficiency superior to traditional oxygen-ion-conducting solid oxide fuel cells (SOFCs). This makes PCFCs an ideal platform for direct ammonia power generation. However， the insufficient ammonia decomposition activity of existing Ni-based anodes at low-to-intermediate temperatures restricts their development. In this study， an infiltration method combined with pulsed-laser metal-salt processing (PLMS) was employed to in-situ synthesize a series of highly dispersed Fe-Co-Ni transition metal alloy catalysts on BaCe0.7Zr0.1Y0.1Yb0.1O3−δ (BCZYYb) anode substrates. The effects of catalyst loading and composition on ammonia decomposition activity and cell performance were investigated. Regarding catalytic activity for ammonia decomposition， optimization established 2.5 wt% as the ideal loading amount. In the composition comparison， Fe3Co3Ni94-BCZYYb exhibited the best activity， reaching 99.8% conversion at 575 °C， making it the earliest among all compositions to approach complete conversion. This remarkable activity is speculated to be due to the introduction of minor amounts of Fe and Co， which achieves a favorable balance between modulating surface adsorption characteristics and preserving the continuous active network of Ni. In terms of single-cell performance， both the maximum power density (MPD) and impedance behavior of Fe3Co3Ni94-BCZYYb outperformed the unmodified Ni-BCZYYb. Under ammonia fuel at 700 °C， it reached a peak power density of 1319 mW cm-2 (compared to 808 mW cm-2 for Ni-BCZYYb). Furthermore， owing to its superior ammonia decomposition activity， it maintained a higher hydrogen supply and power output at low-to-intermediate temperatures， its MPD at 525 °C (424 mW cm-2) was approximately 1.5 times that of Ni-BCZYYb (284 mW cm-2). In a 12-hour stability test under ammonia fuel at 550 °C， its voltage degradation rate was approximately 8.6%， lower than the 13.6% of the unmodified cell， demonstrating that the modified cell possesses both superior ammonia-fueled performance and operational stability. By synthesizing highly dispersed Fe-Co-Ni alloy catalysts in situ via the impregnation-PLMS route， this study clarifies the effects of catalyst loading and composition on ammonia decomposition activity and cell performance， providing a basis for the anode design of direct ammonia-fueled PCFCs. This strategy is expected to promote the practical application of ammonia as a carbon-free hydrogen carrier and to contribute to clean energy conversion and sustainable resource utilization.
