One-pot synthesis of CexZr1-xO2 solid solution catalysts for the splitting of CO2 to CO via thermochemical cycling

SHI Heng; LUO Jing; PU Yan-feng; WANG Feng; LI Feng; CHEN Zhi-wen; SONG Quan-bin; XIAO Fu-kui; ZHAO Ning

Volume 47 Issue 11

Nov. 2019

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Article Navigation > Journal of Fuel Chemistry and Technology > 2019 > 47(11): 1386-1393

SHI Heng, LUO Jing, PU Yan-feng, WANG Feng, LI Feng, CHEN Zhi-wen, SONG Quan-bin, XIAO Fu-kui, ZHAO Ning. One-pot synthesis of CexZr1-xO2 solid solution catalysts for the splitting of CO2 to CO via thermochemical cycling[J]. Journal of Fuel Chemistry and Technology, 2019, 47(11): 1386-1393.

Citation:

SHI Heng, LUO Jing, PU Yan-feng, WANG Feng, LI Feng, CHEN Zhi-wen, SONG Quan-bin, XIAO Fu-kui, ZHAO Ning. One-pot synthesis of Ce_xZr_1-xO₂ solid solution catalysts for the splitting of CO₂ to CO via thermochemical cycling[J]. Journal of Fuel Chemistry and Technology, 2019, 47(11): 1386-1393.

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One-pot synthesis of Ce_xZr_1-xO₂ solid solution catalysts for the splitting of CO₂ to CO via thermochemical cycling

SHI Heng^{1, 2},
LUO Jing^{1, 3},
PU Yan-feng¹,
WANG Feng¹,
LI Feng¹,
CHEN Zhi-wen²,
SONG Quan-bin⁴,
XIAO Fu-kui^{1
,
,},
ZHAO Ning^{1
,
,}

1.
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
2.
School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China
3.
University of Chinese Academy of Sciences, Beijing 100049, China
4.
School of Energy and Power Engineering, Changsha University of Science & Technology, Changsha 410114, China

Funds:

the Natural Science Foundation of Shanxi Province, China 201801D121070

the State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University 2018-K11

the Science Foundation for Young Scientists of Shanxi Province, China 201701D221052

the National Natural Science Foundation of China 21776294

the National Natural Science Foundation of China 21802158

the Independent Research Project of the State Key Laboratory of Coal Conversion 2018BWZ002

More Information

Corresponding author: XIAO Fu-kui, E-mail:xiaofk@sxicc.ac.cn; ZHAO Ning, Fax:+86-351-4041153, E-mail:zhaoning@sxicc.ac.cn
Received Date: 2019-07-25
Rev Recd Date: 2019-10-08

Available Online: 2021-01-23

Publish Date: 2019-11-10

Abstract

Abstract

A series of CeO₂-ZrO₂ solid solutions with different Ce/Zr molar ratios were synthesized by one-pot evaporation-induced self-assembly (EISA) method and characterized by XRD, Raman spectroscopy, H₂-TPR, XPS, SEM and N₂ sorption. The catalytic activity of CeO₂-ZrO₂ solid solutions in the thermochemical splitting of CO₂ to CO were investigated by thermogravimetric analysis. The results reveal that with the increase of Ce/Zr molar ratio, the catalytic activity of CeO₂-ZrO₂ in CO₂ splitting increases first and then decreases. The Ce_0.5Zr_0.5O₂ solution with a Ce/Zr molar ratio of 1 exhibits high activity in CO₂ splitting, owing to its abundant lattice defects and oxygen vacancies which can promote the oxygen migration. In contrast, the Ce_0.75Zr_0.25O₂ solution with a Ce/Zr molar ratio of 3 shows the best cyclic stability, due to its relatively stable number of oxygen vacancies. Sintering of particles was observed after the cycling reaction, accompanying with the phase separation in the Zr-rich solid solutions, which may influence the catalytic performance of CeO₂-ZrO₂ solid solutions in the CO₂ splitting.
- Ce_xZr_1-xO₂,
- CO₂ splitting,
- thermochemical cycle,
- oxygen vacancy

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References(28)

References

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