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学者姓名：蒋译霆
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Abstract ：
Direct ammonia solid oxide fuel cells (DA-SOFCs) have triggered great interest due to their efficient power generation from ammonia directly. However, the compatible match of ammonia decomposition and electrooxidation in the DA-SOFCs remains greatly challenging due to their endo/exothermic properties. Herein, multi-sizes tubular DA-SOFCs were systematically investigated for performance evaluation of power output and ammonia decomposition. Accordingly, a multi-scale electro-thermo model for tubular DA-SOFC was established to intensify the synergy between complex physical-chemical processes and geometry. With the combination of experimental work and simulations, the effects of operating conditions and geometry were comprehensively evaluated. Significantly, the rates of ammonia decomposition and electrooxidation could be effectively matched through the optimization of operating conditions. The geometric design further enables the temperature-zoning of the two processes, competently enhancing the thermal coupling between them. Conclusively, the correlation equations linking the operating conditions, geometry and electrical efficiency were proposed for the scaling-up of tubular DA-SOFCs unit. The tubular DA-SOFC achieves 3.5 W with 60% electrical efficiency, and performed a satisfactory stability for over 330 h. This study provides guidance for oriented design of tubular DA-SOFCs with high electrical efficiency.
Keyword ：
direct ammonia solid oxide fuel cells direct ammonia solid oxide fuel cells geometric design geometric design multi-scale electro-thermo model multi-scale electro-thermo model operating conditions operating conditions performance enhancement performance enhancement
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| GB/T 7714 | Chen, Shuai , Liao, Xiaofei , You, Jiacheng et al. Enhanced coupling of the tubular direct ammonia solid oxide fuel cells for efficient ammonia-to-power [J]. | AICHE JOURNAL , 2025 , 71 (5) . |
| MLA | Chen, Shuai et al. "Enhanced coupling of the tubular direct ammonia solid oxide fuel cells for efficient ammonia-to-power" . | AICHE JOURNAL 71 . 5 (2025) . |
| APA | Chen, Shuai , Liao, Xiaofei , You, Jiacheng , Jiang, Yiting , Zhong, Fulan , Fang, Huihuang et al. Enhanced coupling of the tubular direct ammonia solid oxide fuel cells for efficient ammonia-to-power . | AICHE JOURNAL , 2025 , 71 (5) . |
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Abstract ：
Direct ammonia solid oxide fuel cells (NH3-SOFCs) have been triggered great attention due to its high efficiency and "zero-carbon emission". The anode catalysts are remaining challenging because of the complex reaction processes of NH3-SOFCs. This work presents the enhanced electrochemical performance by combining the electronic-ionic conductivity of alloys and oxygen conductor, and provides molecular engineering insights into the ammonia oxidation mechanism. Fe atoms were partially substituted by Ni atoms to form spinel ZnFe2-xNixO4 (ZFNx) oxides, which contributes to in-situ exsolution of the Fe-Ni alloys as active anodes of NH3-SOFCs under reducing atmosphere. Meanwhile, the derived ZnO acts as an oxide carrier with the electrolyte Gd0.1Ce0.9O1.95 (GDC), improving the dispersion of the alloy particles and providing a new avenue for oxygen ion conductivity. The composite anode ZFN0.05-40GDC ensures sufficient electron and oxygen ion transfer. Consequently, the electrolyte-supported single cell gives the optimal power output of 224 mW/cm2 in NH3, 2.8 times higher than commercial NiO-40YSZ one at 800 degrees C. By distribution of relaxation time as well as Bode plots analysis, the preferential reaction mechanism and rate-determining step are proposed in the anode reaction.
Keyword ：
Anode reaction mechanism Anode reaction mechanism Electrochemical performance Electrochemical performance Fe-Ni alloy Fe-Ni alloy In-situ exsolution In-situ exsolution NH3-SOFCs NH3-SOFCs
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| GB/T 7714 | Zhong, Fulan , Ye, Weijie , Yang, Puxin et al. Unveiling the interfacial reaction of the exsolved Fe-Ni alloy from spinel ZnFe2-xNixO4 as active anode for direct ammonia solid oxide fuel cells [J]. | CHEMICAL ENGINEERING SCIENCE , 2025 , 309 . |
| MLA | Zhong, Fulan et al. "Unveiling the interfacial reaction of the exsolved Fe-Ni alloy from spinel ZnFe2-xNixO4 as active anode for direct ammonia solid oxide fuel cells" . | CHEMICAL ENGINEERING SCIENCE 309 (2025) . |
| APA | Zhong, Fulan , Ye, Weijie , Yang, Puxin , Jiang, Yiting , Fang, Huihuang , Luo, Yu et al. Unveiling the interfacial reaction of the exsolved Fe-Ni alloy from spinel ZnFe2-xNixO4 as active anode for direct ammonia solid oxide fuel cells . | CHEMICAL ENGINEERING SCIENCE , 2025 , 309 . |
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Abstract ：
The development of the anode with high catalytic activity for ammonia (NH3) oxidation and compatible with electrolyte is of great significance for the commercial application of direct ammonia solid oxide fuel cells (NH3-SOFC). The work showed an enhancement of electrochemical performance by optimal design and molecular engineering insights into ammonia oxidation mechanism in depth. Sr-doped LaCr0.85Ni0.15O3 (LSxCN) oxides and defect-induced LaySr0.3Cr0.85Ni0.15O3 (LyS0.3CN) oxides were developed to establish the structure-performance relationship of the component-optimized anodes. After optimal design of the single cell structure, it was found that the electrochemical activity can be significantly improved by adding the isolation layer Gd0.2Ce0.8O2 (GDC) and tuning the defective nonequilibrium of LyS0.3CN. As a result, the electrolyte-supported NH3-SOFC using defect-induced L0.60S0.3CN anode with 50 sccm NH3 as fuel gas gives the maximum power density of 501 mW/ cm2 at 800 degrees C, 8.8 times higher than that of traditional NiO anode (57 mW/cm2). Based on relaxation time distribution analysis, the preferential rate-limiting step of the single cell may be proposed.
Keyword ：
Ammonia oxidation Ammonia oxidation Anode Anode Isolation layer Isolation layer NH3-SOFC NH3-SOFC Ni0 particles Ni0 particles
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| GB/T 7714 | Zhong, Fulan , Gao, Yijie , Jiang, Yiting et al. Optimal design and evaluation of direct ammonia SOFC based on defect-induced LaySr0.3Cr0.85Ni0.15O3-δ anode [J]. | JOURNAL OF THE EUROPEAN CERAMIC SOCIETY , 2025 , 45 (15) . |
| MLA | Zhong, Fulan et al. "Optimal design and evaluation of direct ammonia SOFC based on defect-induced LaySr0.3Cr0.85Ni0.15O3-δ anode" . | JOURNAL OF THE EUROPEAN CERAMIC SOCIETY 45 . 15 (2025) . |
| APA | Zhong, Fulan , Gao, Yijie , Jiang, Yiting , Fang, Huihuang , Luo, Yu , Chen, Chongqi et al. Optimal design and evaluation of direct ammonia SOFC based on defect-induced LaySr0.3Cr0.85Ni0.15O3-δ anode . | JOURNAL OF THE EUROPEAN CERAMIC SOCIETY , 2025 , 45 (15) . |
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Abstract ：
Ammonia serves as a promising energy carrier for hydrogen storage and transport, with zero carbon emissions during hydrogen release. Co-based catalysts are considered promising candidates for ammonia decomposition, but their low activity and poor stability remain key challenges. Herein, oxygen-deficient SrCoO2.5 (SCO) was synthesized, and the effects of different atmospheres (NH3, H2, and N2) on the in situ exsolution of Co nanoparticles (NPs) were investigated. The structure evolution under different atmospheres was characterized by ex situ XRD. The SCO-NH3 catalyst (prepared by in situ exsolution under NH3) demonstrates superior performance with 57.6% NH3 conversion at 550 degrees C under a WHSV of 30,000 mL gcat -1 h-1. This represents 1.5- and 1.8-fold enhancements compared with the SCO-H2 and SCO-N2 catalysts, respectively. In addition, the structure-performance relationship and potential reaction mechanisms were investigated through comprehensive characterizations.
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| GB/T 7714 | Ren, Hongju , Lin, Zhihong , Fang, Huihuang et al. Ammonia-Induced Exsoluted-Co Nanoparticles Derived from Defected SrCoO2.5 for Ammonia Decomposition [J]. | INORGANIC CHEMISTRY , 2025 , 64 (29) : 15165-15174 . |
| MLA | Ren, Hongju et al. "Ammonia-Induced Exsoluted-Co Nanoparticles Derived from Defected SrCoO2.5 for Ammonia Decomposition" . | INORGANIC CHEMISTRY 64 . 29 (2025) : 15165-15174 . |
| APA | Ren, Hongju , Lin, Zhihong , Fang, Huihuang , Jiang, Yiting , Chen, Chongqi , Zhi, Guo et al. Ammonia-Induced Exsoluted-Co Nanoparticles Derived from Defected SrCoO2.5 for Ammonia Decomposition . | INORGANIC CHEMISTRY , 2025 , 64 (29) , 15165-15174 . |
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