Enhanced reducibility and redox stability of Fe2O3 in the presence of CeO2 nanoparticles
Enhanced reducibility and redox stability of Fe2O3 in the presence of CeO2 nanoparticles
复制标题
CeO2 纳米粒子存在下增强 Fe2O3 的还原性和氧化还原稳定性
DOI：
10.1039/c4ra06715k
复制
发表时间：
2014-01-01
期刊：
影响因子：
3.9
通讯作者：
Wang, Hua
中科院分区：
文献类型：
--
作者：
Gu, Zhenhua;Li, Kongzhai;Wang, Hua
采用共沉淀法制备了CeO 2、Fe 2 O3以及一系列CeO 2改性的Fe 2 O3氧化物（Ce/Fe摩尔比为5：95 ~ 50：50），并在不同温度下进行了热老化，并与CeO 2和Fe 2 O3物理混合制备的样品进行了比较。通过XRD、拉曼、TEM、BET比表面积、XPS、H2-TPR和氧脉冲等测试手段，研究了材料的结构、还原行为、储氧能力和氧化还原性能。发现CeO 2颗粒非常小（
CeO2, Fe2O3 and a series of CeO2-modified Fe2O3 oxides with Ce/Fe molar ratios ranging from 5 : 95 to 50 : 50 were prepared by a co-precipitation method and thermally aged at different temperatures, which were compared with corresponding samples prepared by physically mixing CeO2 and Fe2O3. The structural/textural feature, reduction behavior, oxygen storage capacity (OSC), and redox performance of the prepared materials were investigated via XRD, Raman, TEM, BET surface area, XPS, H-2-TPR and oxygen pulse techniques. It was found that CeO2 particles were very small (