Volume 136, Issue 43 e202411048
Forschungsartikel

Atomically Dispersed Iron-Copper Dual-Metal Sites Synergistically Boost Carbonylation of Methane

Dr. Qingpeng Cheng

Dr. Qingpeng Cheng

KAUST Catalysis Center (KCC), Physical Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900 Saudi Arabia

These authors contributed equally to this work.

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Dr. Xueli Yao

Dr. Xueli Yao

KAUST Catalysis Center (KCC), Physical Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900 Saudi Arabia

These authors contributed equally to this work.

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Prof. Dr. Guanna Li

Prof. Dr. Guanna Li

Biobased Chemistry and Technology, Wageningen University & Research, Bornse Weilanden 9, Wageningen, 6708WG The Netherlands

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Guanxing Li

Guanxing Li

Advanced Membranes and Porous Materials Center (AMPMC), KAUST, Thuwal, 23955-6900 Saudi Arabia

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Prof. Dr. Lirong Zheng

Prof. Dr. Lirong Zheng

Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049 China

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Dr. Kaijie Yang

Dr. Kaijie Yang

Advanced Membranes and Porous Materials Center (AMPMC), KAUST, Thuwal, 23955-6900 Saudi Arabia

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Dr. Abdul-Hamid Emwas

Dr. Abdul-Hamid Emwas

Imaging and Characterization Core Lab, KAUST, Thuwal, 23955-6900 Saudi Arabia

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Prof. Dr. Xingang Li

Prof. Dr. Xingang Li

State Key Laboratory of Chemical Engineering, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Haihe Laboratory of Sustainable Chemical Transformations, Tianjin Key Laboratory of Applied Catalysis Science and Engineering, School of Chemical Engineering & Technology, Tianjin University, Tianjin, 300350 P. R. China

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Prof. Dr. Yu Han

Corresponding Author

Prof. Dr. Yu Han

KAUST Catalysis Center (KCC), Physical Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900 Saudi Arabia

Advanced Membranes and Porous Materials Center (AMPMC), KAUST, Thuwal, 23955-6900 Saudi Arabia

Electron Microscopy Center, School of Emergent Soft Matter, South China University of Technology, Guangzhou, 510640 P. R. China

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Prof. Dr. Jorge Gascon

Corresponding Author

Prof. Dr. Jorge Gascon

KAUST Catalysis Center (KCC), Physical Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900 Saudi Arabia

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First published: 30 June 2024
Citations: 3

Abstract

The direct liquid-phase oxidative carbonylation of methane, utilizing abundant natural gas, offers a mild and straightforward alternative. However, most catalysts proposed for this process suffer from low acetic acid yields due to few active sites and rapid C1 oxygenate generation, impeding their industrial feasibility. Herein, we report a highly efficient 0.1Cu/Fe-HZSM-5-TF (TF denotes template-free synthesis) catalyst featuring exclusively mononuclear Fe and Cu anchored in the ZSM-5 channels. Under optimized conditions, the catalyst achieved an unprecedented acetic acid yield of 40.5 mmol gcat−1 h−1 at 50 °C, tripling the previous records of 12.0 mmol gcat−1 h−1. Comprehensive characterization, isotope-labeled experiments and density functional theory (DFT) calculations reveal that the homogeneous mononuclear Fe sites are responsible for the activation and oxidation of methane, while the neighboring Cu sites play a key role in retarding the oxidation process, promoting C−C coupling for effective acetic acid synthesis. Furthermore, the methyl-group carbon in acetic acid originates solely from methane, while its carbonyl-group carbon is derived exclusively from CO, rather than the conversion of other C1 oxygenates. The proposed bimetallic catalyst design not only overcomes the limitations of current catalysts but also generalizes the oxidative carbonylation of other alkanes, demonstrating promising advancements in sustainable chemical synthesis.

Conflict of Interests

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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