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Surface-Modified Carbon Nanotubes Catalyze Oxidative Dehydrogenation of n-Butane

MPS-Authors
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Zhang,  Jian
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Liu,  Xi
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Blume,  Raoul
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons22287

Zhang,  Aihua
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Schlögl,  Robert
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Su,  Dang Sheng
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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378851_Sci322_73-77.pdf
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Citation

Zhang, J., Liu, X., Blume, R., Zhang, A., Schlögl, R., & Su, D. S. (2008). Surface-Modified Carbon Nanotubes Catalyze Oxidative Dehydrogenation of n-Butane. Science, 322(5898), 73-77. doi:10.1126/science.1161916.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0010-FE91-E
Abstract
Butenes and butadiene, which are useful intermediates for the synthesis of polymers and other compounds, are synthesized traditionally by oxidative dehydrogenation (ODH) of n-butane over complex metal oxides. Such catalysts require high O2/butane ratios to maintain the activity, which leads to unwanted product oxidation. We show that carbon nanotubes with modified surface functionality efficiently catalyze the oxidative dehydrogenation of n-butane to butenes, especially butadiene. For low O2/butane ratios, a high selectivity to alkenes was achieved for periods as long as 100 hours. This process is mildly catalyzed by ketonic C=O groups and occurs via a combination of parallel and sequential oxidation steps. A small amount of phosphorus greatly improved the selectivity by suppressing the combustion of hydrocarbons.