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<p>Photocatalytic methanol dehydration to dimethyl ether (DME) offers a sustainable alternative to energy-intensive thermocatalysis, yet its practical application remains constrained by low efficiency. Herein, we designed Ni-doped plasmonic W<sub>18</sub>O<sub>49</sub> nanowires that synergistically integrates low-coordinated W and Ni dual active sites with surface plasmon resonance for enhanced photocatalytic performance. The synergistic effect of W and Ni dual sites is amplified by plasmonic electron oscillations to facilitate the C-O bond cleavage and C-O-C coupling, driving efficient methanol-to-DME conversion. The optimized Ni<sub>0.66</sub>-W<sub>18</sub>O<sub>49</sub> achieves a DME yield of 133.7 ± 3.3 mmol g<sup>-1</sup> h<sup>-1</sup> with 98.7% selectivity under 400 mW cm<sup>-2</sup> illumination. The versatility of the catalyst is demonstrated through C<sub>2+</sub> alcohol dehydration, achieving 40-80% rate enhancements and a recorded isobutylene yield of 3.7 mol g<sup>-1</sup> h<sup>-1</sup>. This study highlights the huge potential of rationally engineered plasmonic semiconductors in solar-driven chemical synthesis, particularly for C-O bond activation and coupling reactions.</p>

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Plasmonic Ni-doped W18O49 with dual active sites drives efficient methanol dehydration to dimethyl ether

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年11月17日

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  • Dehua Tian,
  • Yinlan Liang,
  • Zhaoke Zheng,
  • Liang Mao,
  • Xiaoyan Cai,
  • Yizhen Chen,
  • Xiangxian Wang,
  • Xiaolei Liu,
  • Juan Li,
  • Zeyan Wang,
  • Can Xue,
  • Baojun Li,
  • Zaizhu Lou

摘要

Photocatalytic methanol dehydration to dimethyl ether (DME) offers a sustainable alternative to energy-intensive thermocatalysis, yet its practical application remains constrained by low efficiency. Herein, we designed Ni-doped plasmonic W18O49 nanowires that synergistically integrates low-coordinated W and Ni dual active sites with surface plasmon resonance for enhanced photocatalytic performance. The synergistic effect of W and Ni dual sites is amplified by plasmonic electron oscillations to facilitate the C-O bond cleavage and C-O-C coupling, driving efficient methanol-to-DME conversion. The optimized Ni0.66-W18O49 achieves a DME yield of 133.7 ± 3.3 mmol g-1 h-1 with 98.7% selectivity under 400 mW cm-2 illumination. The versatility of the catalyst is demonstrated through C2+ alcohol dehydration, achieving 40-80% rate enhancements and a recorded isobutylene yield of 3.7 mol g-1 h-1. This study highlights the huge potential of rationally engineered plasmonic semiconductors in solar-driven chemical synthesis, particularly for C-O bond activation and coupling reactions.