Microstructured ZrO2 coating of iron oxide for enhanced CO2 conversion

Microstructured ZrO2 coating of iron oxide for enhanced CO2 conversion
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用于增强 CO2 转化的氧化铁微结构 ZrO2 涂层

DOI:
10.1016/j.apcatb.2021.120194
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发表时间:
2021-04
期刊:
Applied Catalysis B: Environmental
影响因子:
--
通讯作者:
Vladimir V. Galvita
Vladimir V. Galvita
中科院分区:
其他
文献类型:
--
作者:
Bo Jin;Hilde Poelman;Christophe Detavernier;Zhiwu Liang;Guy B. Marin;Vladimir V. Galvita

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这项工作提供了一种方法来设计氧载体的化学循环。以普鲁士蓝微立方体为原料,研制了Zr促进的Fe基CO2转化材料,在ZrO 2壳层的保护下,ZrO 2包覆普鲁士蓝的热致氧化分解形成了空心结构材料.详细的活性测试和原位表征被用来研究材料的结构,稳定性和从CO2转化的CO产率之间的关系。在100次H2-CO2氧化还原循环中,10%Fe2O3/ZrO 2的CO时空产率(86 mmol·s-1·kgFe 2 O3 -1)比未促进的中空结构Fe 2 O3高27倍.这种上级性能源于ZrO 2所起的双重作用:保护结构,从而提高氧化铁的抗烧结性,以及在氧化还原循环过程中促进氧化铁的还原。空心结构和Fe 2 O 3与ZrO 2之间的相互作用是氧化还原活性增强的主要原因。
This work provides a way to design oxygen carriers for chemical looping. Starting from Prussian blue microcubes, Zr-promoted Fe-based materials are developed for the conversion of CO 2 into CO. Thermally induced oxidative decomposition of ZrO 2-coated Prussian blue under the protection of the firstly formed ZrO 2 shell leads to the formation of hollow structured materials. Detailed activity tests and in-situ characterization are used to investigate the relationship between material structure, stability and CO yield from CO 2 conversion. Throughout one hundred H 2-CO 2 redox cycles, 10% Fe 2 O 3/ZrO 2 exhibits a 27 times higher CO space-time yield (86 m m o l∙ s-1∙ k g F e 2 O 3-1) than unpromoted, yet hollow structured Fe 2 O 3. This superior performance derives from the dual role that ZrO 2 plays: protecting the structure, thereby improving the iron oxide sintering resistance, and facilitating the reduction of iron oxide during redox cycles. The hollow structure and the interaction between Fe 2 O 3 and ZrO 2 are the main reasons for the enhanced redox activity.
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