A two-step synthesis of fe-substituted hexaaluminates with enhanced surface area and activity in methane catalytic combustion | |
Huang, Fei1,2; Wang, Xiaodong1; Wang, Aiqin1; Xu, Jinming1; Zhang, Tao1 | |
刊名 | Catalysis science & technology |
2016 | |
卷号 | 6期号:13页码:4962-4969 |
ISSN号 | 2044-4753 |
DOI | 10.1039/c5cy02187a |
通讯作者 | Wang, xiaodong(xdwang@dicp.ac.cn) |
英文摘要 | Hexaaluminates have been regarded as one of the most promising candidates for methane catalytic combustion due to their superior thermal stability up to 1600 degrees c. however, the main challenge for their further application lies in the difficulty in enhancing the surface area. herein, fe-substituted hexaaluminates (lafexal12-xo19, x = 0-2) with high surface areas (44-51 m(2) g(-1)) have been successfully synthesized via a new two-step method for the first time, in which n,n-dimethylformamide (dmf) was used as a difunctional solvent to derive the precipitant dimethylamine and to control the precipitation rates of the three metal cations, leading to superior homogeneity of the precipitate and thus lowering of the phase formation temperature (lower than 1100 degrees c), and the resin/ carbon coating process was employed to separate the crystallization and grain-growth process, avoiding the aggregation of particles. methane catalytic combustion tests revealed that both the high surface area and the introduction of fe could result in low apparent activation energy. the lafeal11o19 catalyst exhibited even higher activity than the conventional pd/al2o3 catalyst and those prepared by other methods such as the reverse microemulsion method. mossbauer spectroscopy characterization verified that the catalytic activity of fe cations should be related to the fe3+ ions in al(3) sites and al(5) sites in the mirror planes. |
WOS关键词 | BARIUM HEXAALUMINATE ; CRYSTALLOGRAPHIC SITES ; CRYSTAL-STRUCTURE ; MEDIATED SYNTHESIS ; OXYGEN-TRANSFER ; OXIDATION ; MN ; DECOMPOSITION ; OXIDES ; N2O |
WOS研究方向 | Chemistry |
WOS类目 | Chemistry, Physical |
语种 | 英语 |
出版者 | ROYAL SOC CHEMISTRY |
WOS记录号 | WOS:000378734700036 |
内容类型 | 期刊论文 |
URI标识 | http://www.corc.org.cn/handle/1471x/2374723 |
专题 | 中国科学院大学 |
通讯作者 | Wang, Xiaodong |
作者单位 | 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
推荐引用方式 GB/T 7714 | Huang, Fei,Wang, Xiaodong,Wang, Aiqin,et al. A two-step synthesis of fe-substituted hexaaluminates with enhanced surface area and activity in methane catalytic combustion[J]. Catalysis science & technology,2016,6(13):4962-4969. |
APA | Huang, Fei,Wang, Xiaodong,Wang, Aiqin,Xu, Jinming,&Zhang, Tao.(2016).A two-step synthesis of fe-substituted hexaaluminates with enhanced surface area and activity in methane catalytic combustion.Catalysis science & technology,6(13),4962-4969. |
MLA | Huang, Fei,et al."A two-step synthesis of fe-substituted hexaaluminates with enhanced surface area and activity in methane catalytic combustion".Catalysis science & technology 6.13(2016):4962-4969. |
个性服务 |
查看访问统计 |
相关权益政策 |
暂无数据 |
收藏/分享 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论