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<p>Light-driven bioethanol dehydration offers attractive outlooks for the sustainable production of ethylene. Herein, a surface-hydrogenated CrMnO<sub><i>x</i></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><i>x</i></sub>. This work illustrates a new route for sustainable ethylene production with the only use of bioethanol and sunlight beyond fossil fuels.</p>

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Surface-hydrogenated CrMnOx coupled with GaN nanowires for light-driven bioethanol dehydration to ethylene

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年1月24日

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  • Zhouzhou Wang,
  • Haotian Ye,
  • Yixin Li,
  • Bowen Sheng,
  • Ping Wang,
  • Pengfei Ou,
  • Xiao-Yan Li,
  • Tianqi Yu,
  • Zijian Huang,
  • Jinglin Li,
  • Ying Yu,
  • Xinqiang Wang,
  • Zhen Huang,
  • Baowen Zhou

摘要

Light-driven bioethanol dehydration offers attractive outlooks for the sustainable production of ethylene. Herein, a surface-hydrogenated CrMnOx 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 C2H5OH-to-C2H4 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·gcat−1·h−1 with a high turnover number of 94,769 mole ethylene per mole CrMnOx. This work illustrates a new route for sustainable ethylene production with the only use of bioethanol and sunlight beyond fossil fuels.