Upgrading CO2 to sustainable aromatics via perovskite-mediated tandem catalysis

Guo Tian, Zhengwen Li, Chenxi Zhang (), Xinyan Liu, Xiaoyu Fan, Kui Shen, Haibin Meng, Ning Wang, Hao Xiong, Mingyu Zhao, Xiaoyu Liang, Liqiang Luo, Lan Zhang, Binhang Yan, Xiao Chen (), Hong-Jie Peng () and Fei Wei ()
Additional contact information
Guo Tian: Tsinghua University
Zhengwen Li: Tsinghua University
Chenxi Zhang: Tsinghua University
Xinyan Liu: University of Electronic Science and Technology of China
Xiaoyu Fan: Tsinghua University
Kui Shen: South China University of Technology
Haibin Meng: Taiyuan University of Technology
Ning Wang: Beijing University of Technology
Hao Xiong: Tsinghua University
Mingyu Zhao: Tsinghua University
Xiaoyu Liang: Tsinghua University
Liqiang Luo: Tsinghua University
Lan Zhang: Beijing University of Technology
Binhang Yan: Tsinghua University
Xiao Chen: Tsinghua University
Hong-Jie Peng: University of Electronic Science and Technology of China
Fei Wei: Tsinghua University

Nature Communications, 2024, vol. 15, issue 1, 1-13

Abstract: Abstract The directional transformation of carbon dioxide (CO2) with renewable hydrogen into specific carbon-heavy products (C6+) of high value presents a sustainable route for net-zero chemical manufacture. However, it is still challenging to simultaneously achieve high activity and selectivity due to the unbalanced CO2 hydrogenation and C–C coupling rates on complementary active sites in a bifunctional catalyst, thus causing unexpected secondary reaction. Here we report LaFeO3 perovskite-mediated directional tandem conversion of CO2 towards heavy aromatics with high CO2 conversion (> 60%), exceptional aromatics selectivity among hydrocarbons (> 85%), and no obvious deactivation for 1000 hours. This is enabled by disentangling the CO2 hydrogenation domain from the C-C coupling domain in the tandem system for Iron-based catalyst. Unlike other active Fe oxides showing wide hydrocarbon product distribution due to carbide formation, LaFeO3 by design is endowed with superior resistance to carburization, therefore inhibiting uncontrolled C–C coupling on oxide and isolating aromatics formation in the zeolite. In-situ spectroscopic evidence and theoretical calculations reveal an oxygenate-rich surface chemistry of LaFeO3, that easily escape from the oxide surface for further precise C–C coupling inside zeolites, thus steering CO2-HCOOH/H2CO-Aromatics reaction pathway to enable a high yield of aromatics.

Date: 2024
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DOI: 10.1038/s41467-024-47270-z

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