Volume 61, Issue 1 e202113079
Research Article
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Active Exsolved Metal–Oxide Interfaces in Porous Single-Crystalline Ceria Monoliths for Efficient and Durable CH4/CO2 Reforming

Yongchun Xiao

Yongchun Xiao

Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002 China

Key Laboratory of Design & Assembly of Functional Nanostructures, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002 China

Advanced Energy Science and Technology Guangdong Laboratory, 29 Sanxin North Road, Huizhou, Guangdong, 116023 China

University of Chinese Academy of Sciences, Beijing, 100049 China

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Prof. Kui Xie

Corresponding Author

Prof. Kui Xie

Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002 China

Key Laboratory of Design & Assembly of Functional Nanostructures, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002 China

Advanced Energy Science and Technology Guangdong Laboratory, 29 Sanxin North Road, Huizhou, Guangdong, 116023 China

University of Chinese Academy of Sciences, Beijing, 100049 China

Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou, Fujian, 350108 China

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First published: 21 October 2021
Citations: 57

Graphical Abstract

Here we created active metal–oxide interfaces in porous single-crystalline CeO2 monoliths with in situ exsolved single-crystalline Ni nanoparticles and show efficient and durable CH4/CO2 reforming at a relatively low temperature of 450 °C.

Abstract

Dry reforming of CH4/CO2 provides an attractive route to convert greenhouse gas into syngas; however, the resistance to sintering and coking of catalyst remains a fundamental challenge at high operation temperatures. Here we create active and durable metal–oxide interfaces in porous single-crystalline (PSC) CeO2 monoliths with in situ exsolved single-crystalline (SC) Ni particles and show efficient dry reforming of CH4/CO2 at temperatures as low as 450 °C. We show the excellent and durable performance with ≈20 % of CH4 conversion and ≈30 % of CO2 conversion even in a continuous operation of 240 hours. The well-defined active metal–oxide interfaces, created by exsolving SC Ni nanoparticles from PSC NixCe1−xO2 to anchor them on PSC CeO2 scaffolds, prevent nanoparticle sintering and enhance the coking resistance due to the stronger metal–support interactions. Our work would enable an industrially and economically viable path for carbon reclamation, and the technique of creating active and durable metal–oxide interfaces in PSC monoliths could lead to stable catalyst designs for many challenging reactions.

Conflict of interest

The authors declare no conflict of interest.

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