(1. 南京理工大學(xué) 化工學(xué)院，南京 210094；
2. 南京工程學(xué)院 環(huán)境工程系，南京 211167)
摘 要: 采用EDTA-檸檬酸絡(luò)合法制備固體氧化物燃料電池鈣鈦礦型耐硫陽(yáng)極催化劑La0.7Sr0.3Cr0.87Y0.13O3-δ。采用TG-DSC對(duì)EDTA-檸檬酸絡(luò)合法制備的陽(yáng)極溶膠的熱分解溫度及晶相的形成溫度進(jìn)行分析；采用XRD和SEM等分析手段對(duì)燒結(jié)后的陽(yáng)極粉末進(jìn)行表征，并與尿素燃燒法制備的陽(yáng)極粉末進(jìn)行對(duì)比。再通過(guò)熱力學(xué)軟件計(jì)算分析陽(yáng)極在H2S氣氛中于一定氧分壓(p(O2))和硫分壓(p(S2))下的穩(wěn)定性，對(duì)硫化前后陽(yáng)極粉末的紅外光譜進(jìn)行對(duì)比分析，并對(duì)其耐硫性進(jìn)行驗(yàn)證。結(jié)果表明：EDTA-檸檬酸絡(luò)合法可以降低La0.7Sr0.3Cr0.87Y0.13O3-δ的燒結(jié)溫度；La0.7- Sr0.3Cr0.87Y0.13O3-δ具有一定的耐硫性能，升高操作溫度和增大氧分壓可以提高其耐硫性，符合耐硫陽(yáng)極的要求。
關(guān)鍵字: 固體氧化物燃料電池；La0.7Sr0.3Cr0.87Y0.13O3?δ；EDTA?檸檬酸絡(luò)合法；熱力學(xué)分析
（1. School of Chemical Engineering, Nanjing University of Science & Technology, Nanjing 210094, China;
2. Department of Environmental Engineering, Nanjing Institute of Technology, Nanjing 2111）
Abstract:The perovskite-type sulfur tolerant anode catalyst La0.7Sr0.3Cr0.87Y0.13O3-δ (LSCY) for solid oxide fuel cells (SOFCs) was synthesized by EDTA-citrate complexing method. The thermal decomposition temperature and forming temperature of the crystal phase of the gel prepared by EDTA-citrate complexing method were analyzed by TG-DSC. The powders after sintering were characterized by XRD and SEM, and compared with the powders prepared by urea combustion method. The thermodynamic calculation was made to analyze the stability of the anode materials when being exposed to H2S in a range of partial pressures of sulphur (p(S2)) and oxygen (p(O2)). The infrared spectra of the anode were compared before and after exposure to H2S to test the resistance to sulfur. The results show that the sintering temperature is decreased by using EDTA-citrate complexing method, the La0.7Sr0.3Cr0.87Y0.13O3-δ is resistant to sulfur, and increasing the operating temperature and the partial pressures of oxygen (pO2) can improve its resistance to sulfur. Therefore, it meets the requirements of sulfur- tolerant anode.
Key words: solid oxide fuel cells; La0.7Sr0.3Cr0.87Y0.13O3?δ (LSCY); EDTA-citrate complexing method; thermodynamic analysis
