Surface-hydrogenated CrMnO<sub>x</sub> coupled with GaN nanowires for light-driven bioethanol dehydration to ethylene.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 39856060.
- Also identified by DOI 10.1038/s41467-025-56277-z and PMC identifier 11760371.
- Licence recorded as CC BY-NC-ND.
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Abstract
Light-driven bioethanol dehydration offers attractive outlooks for the sustainable production of ethylene. Herein, a surface-hydrogenated CrMnO<sub>x</sub> is coupled with GaN nanowires (GaN@CMO-H) for light-driven ethanol dehydration to ethylene. Through combined experimental and computational investigations, a surface hydrogen-replenishment mechanism is proposed to disclose the ethanol dehydration pathway over GaN@CMO-H. Moreover, the surface-hydrogenated GaN@CMO-H can significantly lower the reaction energy barrier of the C<sub>2</sub>H<sub>5</sub>OH-to-C<sub>2</sub>H<sub>4</sub> conversion by switching the rate-determining reaction step compared to both GaN and GaN@CMO. Consequently, the surface-hydrogenated GaN@CMO-H illustrates a considerable ethylene production activity of 1.78 mol·g<sub>cat</sub><sup>-1</sup>·h<sup>-1</sup> with a high turnover number of 94,769 mole ethylene per mole CrMnO<sub>x</sub>. This work illustrates a new route for sustainable ethylene production with the only use of bioethanol and sunlight beyond fossil fuels.