Direct conversion of CO and H2O to hydrocarbons at atmospheric pressure using a TiO2−x/Ni photothermal catalyst

Xuetao Qin, Ming Xu, Jianxin Guan, Li Feng, Yao Xu, Lirong Zheng, Meng Wang, Jian-Wen Zhao, Jia-Lan Chen, Jie Zhang, Jinglin Xie, Zhihao Yu, Ruiqi Zhang, Xinmao Li, Xi Liu (), Jin-Xun Liu (), Junrong Zheng () and Ding Ma ()
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Xuetao Qin: Peking University
Ming Xu: Peking University
Jianxin Guan: Peking University
Li Feng: University of Science and Technology of China
Yao Xu: Peking University
Lirong Zheng: The Chinese Academy of Sciences
Meng Wang: Peking University
Jian-Wen Zhao: University of Science and Technology of China
Jia-Lan Chen: University of Science and Technology of China
Jie Zhang: Peking University
Jinglin Xie: Peking University
Zhihao Yu: Peking University
Ruiqi Zhang: Peking University
Xinmao Li: Peking University
Xi Liu: Shanghai Jiaotong University
Jin-Xun Liu: University of Science and Technology of China
Junrong Zheng: Peking University
Ding Ma: Peking University

Nature Energy, 2024, vol. 9, issue 2, 154-162

Abstract: Abstract Hydrocarbon fuels can be synthesized from CO and water via Kölbel–Engelhardt synthesis, a thermocatalytic process in which temperatures of ≥200 °C and elevated pressures are typically needed. While light-driven hydrocarbon production by CO hydrogenation has been demonstrated under milder conditions, for this reaction H2 must first be sourced. Here we report the direct production of hydrocarbons from CO and water at atmospheric pressure via light-driven Kölbel–Engelhardt synthesis without external heating or the addition of H2. Using a TiO2-supported Ni catalyst, we obtain an activity of 8.83 mol−CH2− molNi−1 h−1 and C2+ selectivity higher than 55%. In situ spectroscopy and density functional theory calculations suggest that the migration of photogenerated electrons from TiO2 to Ni facilitates carbon–carbon coupling at the interface of the TiO2−x/Ni catalyst, which accounts for the observed high selectivity towards multi-carbon products.

Date: 2024
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DOI: 10.1038/s41560-023-01418-1

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