文献类型：期刊文献

英文题名：Highly sintering-resistant iron oxide with a hetero-oxide shell for chemical looping water splitting

作者：Wang, Iwei[1];Liu, Lei[2];Yu, Shuyao[1];Lai, Nien-Chu[3];Gao, Yunfei[4];Li, Zhenshan[2];Liu, Jianguo[1];Wang, Wei[1]

机构：[1]Tsinghua Univ, Sch Environm, Beijing 100084, Peoples R China;[2]Tsinghua Univ, Dept Energy & Power Engn, Key Lab Thermal Sci & Power Engn, Minist Educ, Beijing 100084, Peoples R China;[3]Univ Sci & Technol Beijing, Sch Energy & Environm Engn, Beijing 100083, Peoples R China;[4]East China Univ Sci & Technol, Shanghai Engn Res Ctr Coal Gasificat, Key Lab Coal Gasificat & Energy Chem Engn, Minist Educ, Shanghai 200237, Peoples R China

年份：2024

卷号：57

起止页码：438

外文期刊名：INTERNATIONAL JOURNAL OF HYDROGEN ENERGY

收录：;EI(收录号：20240215370797);WOS:【SCI-EXPANDED(收录号:WOS:001156128800001)】；

基金：This research was supported by the National Natural Science Foundation of China (Grant No. 52306150, 21477061) , financial support from the China Postdoctoral Science Foundation (2023M741896) . The authors also wish to express thanks to China Bio-derived Gaseous Fuel Alliance (Tsinghua University) for support.

语种：英文

外文关键词：Hydrogen production; Chemical looping; Redox catalyst; Hetero-oxide shell; Long-term performance

摘要：Chemical looping water splitting is a promising technology that couples carbonaceous fuel oxidation to produce H-2 with inherent CO2 separation. Redox catalyst with long-term performance is the key issue but is hampered in traditional Fe2O3-based approaches due to Fe sintering. This study reports a one-step sol-gel synthetic method to construct Fe2O3@Hetero-oxide redox catalysts with core-shell structure, leading to outstanding anti-sintering property in TGA analysis (>250 cycles, 5000 min). Fixed-bed reactor tests showed that hydrogen yield approached theoretical value (16.7 mmol/g-Fe2O3), with similar to 100 % H-2 purity. This result is significantly better than dispersing a mixed ionic-electronic conductor (MIEC) in Fe2O3 matrix using high energy ball milling. Although the latter can enhance the durability due to facilitated O2- and electron transportation, Fe sintering and redox catalysts deactivation is inevitable. This study offers a generalized structure design and synthetic approach for anti-sintering redox catalysts within chemical looping concepts.