Unraveling the atomic interdiffusion mechanism of NiFe2O4 oxygen carriers during chemical looping CO2 conversion
文献类型：期刊论文
| 作者 | Song, Da1,2; Lin, Yan1; Fang, Shiwen3; Li, Yang1; Zhao, Kun1; Chen, Xinfei1; Huang, Zhen1,2; He, Fang4; Zhao, Zengli1,2; Huang, Hongyu1,2 |
| 刊名 | CARBON ENERGY
 |
| 出版日期 | 2024-02-27 |
| 页码 | 17 |
| 关键词 | chemical looping CO2 splitting density functional theory in situ characterization ionic migration |
| DOI | 10.1002/cey2.493 |
| 通讯作者 | Huang, Zhen(huangzhen@ms.giec.ac.cn) ; He, Fang(hefang@glut.edu.cn) |
| 英文摘要 | By employing metal oxides as oxygen carriers, chemical looping demonstrates its effectiveness in transferring oxygen between reduction and oxidation environments to partially oxidize fuels into syngas and convert CO2 into CO. Generally, NiFe2O4 oxygen carriers have demonstrated remarkable efficiency in chemical looping CO2 conversion. Nevertheless, the intricate process of atomic migration and evolution within the internal structure of bimetallic oxygen carriers during continuous high-temperature redox cycling remains unclear. Consequently, the lack of a fundamental understanding of the complex ionic migration and oxygen transfer associated with energy conversion processes hampers the design of high-performance oxygen carriers. Thus, in this study, we employed in situ characterization techniques and theoretical calculations to investigate the ion migration behavior and structural evolution in the bulk of NiFe2O4 oxygen carriers during H-2 reduction and CO2/lab air oxidation cycles. We discovered that during the H-2 reduction step, lattice oxygen rapidly migrates to vacancy layers to replenish consumed active oxygen species, while Ni leaches from the material and migrates to the surface. During the CO2 splitting step, Ni migrates toward the core of the bimetallic oxygen carrier, forming Fe-Ni alloys. During the air oxidation step, Fe-Ni migrates outward, creating a hollow structure owing to the Kirkendall effect triggered by the swift transfer of lattice oxygen. The metal atom migration paths depend on the oxygen transfer rates. These discoveries highlight the significance of regulating the release-recovery rate of lattice oxygen to uphold the structures and reactivity of oxygen carriers. This work offers a comprehensive understanding of the oxidation/reduction-driven atomic interdiffusion behavior of bimetallic oxygen carriers. |
| WOS关键词 | COMBUSTION ; METHANE ; FERRITE ; COAL ; GASIFICATION ; EXPLORATION ; PERFORMANCE ; SURFACES ; HEMATITE ; CATALYST |
| 资助项目 | National Natural Science Foundation of China ; Foundation and Applied Foundation Research of Guangdong Province[2022B1515020045] ; Guangxi Natural Science Foundation[2021GXNSFAA075036] ; Young Talent Support Project of Guangzhou Association for Science and Technology[QT-2023-042] ; [52076209] ; [52006224] ; [52106285] ; [22179027] |
| WOS研究方向 | Chemistry ; Energy & Fuels ; Science & Technology - Other Topics ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:001176720400001 |
| 出版者 | WILEY |
| 资助机构 | National Natural Science Foundation of China ; Foundation and Applied Foundation Research of Guangdong Province ; Guangxi Natural Science Foundation ; Young Talent Support Project of Guangzhou Association for Science and Technology |
| 源URL | [http://ir.giec.ac.cn/handle/344007/41029]  |
| 专题 | 中国科学院广州能源研究所 |
| 通讯作者 | Huang, Zhen; He, Fang |
| 作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China 2.Univ Sci & Technol China, Sch Energy Sci & Engn, Hefei, Peoples R China 3.Zhongkai Univ Agr & Engn, Coll Mech & Elect Engn, Guangzhou, Peoples R China 4.Guilin Univ Technol, Coll Chem & Bioengn, Guilin 541004, Peoples R China 5.North Carolina State Univ, Raleigh, NC USA |
| 推荐引用方式 GB/T 7714 | Song, Da,Lin, Yan,Fang, Shiwen,et al. Unraveling the atomic interdiffusion mechanism of NiFe2O4 oxygen carriers during chemical looping CO2 conversion[J]. CARBON ENERGY,2024:17. |
| APA | Song, Da.,Lin, Yan.,Fang, Shiwen.,Li, Yang.,Zhao, Kun.,...&Li, Fanxing.(2024).Unraveling the atomic interdiffusion mechanism of NiFe2O4 oxygen carriers during chemical looping CO2 conversion.CARBON ENERGY,17. |
| MLA | Song, Da,et al."Unraveling the atomic interdiffusion mechanism of NiFe2O4 oxygen carriers during chemical looping CO2 conversion".CARBON ENERGY (2024):17. |
入库方式： OAI收割
来源：广州能源研究所
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