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Spaced-Confined Capsule Catalysts with Tunable Micro-Environments for Efficient CO2 Conversion
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  • Hao Wu,
  • Lisheng Guo,
  • Xianbiao Wang,
  • Wenjie Zhou,
  • Fang Chen,
  • Da Li,
  • Kai Liu,
  • Peipei Ai,
  • Yuxue Wei,
  • Mengdie Cai,
  • Song Sun
Hao Wu
Anhui University
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Lisheng Guo
Anhui University

Corresponding Author:[email protected]

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Xianbiao Wang
Anhui University
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Wenjie Zhou
Anhui University
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Fang Chen
Anhui University
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Da Li
Linhuan Coking Company Limited
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Peipei Ai
Taiyuan University of Technology
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Yuxue Wei
Anhui University
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Mengdie Cai
Anhui University
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Song Sun
Anhui University
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Abstract

CO2 as a greenhouse gas causes a series of issues, and catalytic utilization of CO2 to fuels is a favorable strategy. Herein, we report the discovery in CO2 hydrogenation reaction where C5+ yield can be evidently improved by encapsulating ZnFe2O4 inside ZSM-5, in which the micro-environments of core-shell components can be tuned. For the ZnFe2O4, the K promoter makes the Fe-C structure more electron deficient than the Na, which contributes to the formation of long-chain olefins. ZSM-5 with K or Ce modification presents enhanced adsorption ability of alkene, then promoting aromatization and isomerization reactions of alkenes. Compared with Ce, K-ZSM-5 contributes to isomerization rather than aromatization, forming more isoparaffins. In this work, regulating the microenvironment of capsule catalysts provides a new idea for the design of efficient tandem catalysts, and expands the ability of hybrid catalysts against other catalysts, thus presenting an excellent catalytic efficiency for CO2 upgrading.