Auto-accelerated dehydrogenation of alkane assisted by in-situ formed olefins over boron nitride under aerobic conditions

Zhankai Liu, Ziyi Liu, Jie Fan, Wen-Duo Lu, Fan Wu, Bin Gao, Jian Sheng, Bin Qiu, Dongqi Wang and An-Hui Lu ()
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Zhankai Liu: Dalian University of Technology
Ziyi Liu: Dalian University of Technology
Jie Fan: Dalian University of Technology
Wen-Duo Lu: Dalian University of Technology
Fan Wu: Dalian University of Technology
Bin Gao: Dalian University of Technology
Jian Sheng: Dalian University of Technology
Bin Qiu: Dalian University of Technology
Dongqi Wang: Dalian University of Technology
An-Hui Lu: Dalian University of Technology

Nature Communications, 2023, vol. 14, issue 1, 1-9

Abstract: Abstract Oxidative dehydrogenation (ODH) of alkane over boron nitride (BN) catalyst exhibits high olefin selectivity as well as a small ecological carbon footprint. Here we report an unusual phenomenon that the in-situ formed olefins under reactions are in turn actively accelerating parent alkane conversion over BN by interacting with hydroperoxyl and alkoxyl radicals and generating reactive species which promote oxidation of alkane and olefin formation, through feeding a mixture of alkane and olefin and DFT calculations. The isotope tracer studies reveal the cleavage of C-C bond in propylene when co-existing with propane, directly evidencing the deep-oxidation of olefins occur in the ODH reaction over BN. Furthermore, enhancing the activation of ethane by the in-situ formed olefins from propane is successfully realized at lower temperature by co-feeding alkane mixture strategy. This work unveils the realistic ODH reaction pathway over BN and provides an insight into efficiently producing olefins.

Date: 2023
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DOI: 10.1038/s41467-022-35776-3

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