摘要
通过热分解法制备Ni0.75Fe0.25催化层,研究了不同螯合剂(柠檬酸,乙醇酸和D-葡萄糖酸)对催化层的结构及抗积碳性能的影响。结果表明:热分解法制得的晶相为Fe Ni3相,其结构及尺寸均与螯合剂有关。氧-程序升温氧化和拉曼光谱分析表明含D-葡萄糖酸的催化层具有最佳的抗积碳能力。采用D-葡萄糖酸改性催化层制作的单电池在650℃的甲烷燃料中最大功率达289 m W·cm-2。另外,该电池在甲烷燃料中以600 m A·cm-2的电流密度下运行9 h后电压仍保持初始电压的61%,而未改性的单电池电压相同运行条件下仅余53%。
A typical Ni0.75Fe0.25 catalyst was prepared with different chelating agents,citric acid(CA),glycolic acid(GA) and Dgluconic acid(D-GA) by thermal decomposition method.The phase structure and crystalline size of Fe Ni3 phase in reduced catalysts depend on chelating agents.The O2-TPO profiles and Raman spectra reveal that the D-GA catalyst has the best coke resistance among the catalysts.In addition,the cell with the D-GA catalyst layer has a maximum peak power density of 289 m W·cm-2when operating at 650℃ in methane.Moreover,the voltage of the cell still remains 61% of the initial value after operating in methane for 9 hours under a current density of 600 m A·cm-2at 650 ℃,which is more stable than that of catalyst layer without chelating agent(53%).
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2014年第12期26-30,共5页
Transactions of Materials and Heat Treatment
基金
国家自然科学基金(51102045
11374053)
福建省新世纪优秀人才支持计划(JA12013)
关键词
催化层
螯合剂
热分解
相结构
抗积碳
catalyst layer
chelating agents
thermal decomposition
phase structure
coking resistance
