Nature Communications (Oct 2023)

Edge-rich molybdenum disulfide tailors carbon-chain growth for selective hydrogenation of carbon monoxide to higher alcohols

  • Jingting Hu,
  • Zeyu Wei,
  • Yunlong Zhang,
  • Rui Huang,
  • Mingchao Zhang,
  • Kang Cheng,
  • Qinghong Zhang,
  • Yutai Qi,
  • Yanan Li,
  • Jun Mao,
  • Junfa Zhu,
  • Lihui Wu,
  • Wu Wen,
  • Shengsheng Yu,
  • Yang Pan,
  • Jiuzhong Yang,
  • Xiangjun Wei,
  • Luozhen Jiang,
  • Rui Si,
  • Liang Yu,
  • Ye Wang,
  • Dehui Deng

DOI
https://doi.org/10.1038/s41467-023-42325-z
Journal volume & issue
Vol. 14, no. 1
pp. 1 – 11

Abstract

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Abstract Selective hydrogenation of carbon monoxide (CO) to higher alcohols (C2+OH) is a promising non-petroleum route for producing high-value chemicals, in which precise regulations of both C-O cleavage and C-C coupling are highly essential but remain great challenges. Herein, we report that highly selective CO hydrogenation to C2-4OH is achieved over a potassium-modified edge-rich molybdenum disulfide (MoS2) catalyst, which delivers a high CO conversion of 17% with a superior C2-4OH selectivity of 45.2% in hydrogenated products at 240 °C and 50 bar, outperforming previously reported non-noble metal-based catalysts under similar conditions. By regulating the relative abundance of edge to basal plane, C2-4OH to methanol selectivity ratio can be overturned from 0.4 to 2.2. Mechanistic studies reveal that sulfur vacancies at MoS2 edges boost carbon-chain growth by facilitating not only C-O cleavage but also C-C coupling, while potassium promotes the desorption of alcohols via electrostatic interaction with hydroxyls, thereby enabling preferential formation of C2-4OH.