Improving both the activity and stability is of great importance for MoS₂-based catalysts in the hydrodeoxygenation (HDO) reaction. Herein, we report the construction of monolayer CoMoS anchored on hydrophobic-reduced graphene nanoribbons (ML-CoMoS/rGNRs) which exhibited excellent activity and stability in the HDO of 4-methylphenol. The superior HDO activity was attributed to the single layer structure of MoS₂, which allows the good exposure of abundant edge sites for accommodating Co promoters to form the Co–Mo–S active phase. Besides, the hydrophobicity of rGNRs enables the fast removal of H₂O during the HDO reaction, which alleviates the sulfur loss and endows the excellent stability of supported CoMoS monolayers. Consequently, ML-CoMoS/rGNRs afforded 97.3% conversion and 98.4% toluene selectivity at 220 °C for at least five reaction cycles. This work provides novel insights for designing highly active and stable metal sulfide catalysts for the application in the HDO reaction.

中文翻译：

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单层 CoMoS 锚定在疏水性还原石墨烯纳米带上，用于高效加氢脱氧


提高活性和稳定性对于加氢脱氧 （HDO） 反应中基于 MoS₂ 的催化剂非常重要。在此，我们报道了锚定在疏水还原石墨烯纳米带 （ML-CoMoS/rGNRs） 上的单层 CoMoS 的构建，它在 4-甲基苯酚的 HDO 中表现出优异的活性和稳定性。卓越的 HDO 活性归因于 MoS₂ 的单层结构，它允许良好的暴露丰富的边缘位点，以适应 Co 启动子形成 Co-Mo-S 活性期。此外，rGNRs 的疏水性能够在 HDO 反应过程中快速去除 H₂O，从而减轻硫损失并赋予负载型 CoMoS 单层优异的稳定性。因此，ML-CoMoS/rGNRs 在 220 °C 下至少五个反应循环中具有 97.3% 的转化率和 98.4% 的甲苯选择性。这项工作为设计高活性和稳定的金属硫化物催化剂在 HDO 反应中的应用提供了新的见解。