当前位置: X-MOL 学术Chem. Eng. Sci. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Engineering the electronic structure of Pt for selective hydrogenation of vanillin to vanillyl alcohol and p-cresol
Chemical Engineering Science ( IF 4.1 ) Pub Date : 2024-08-29 , DOI: 10.1016/j.ces.2024.120616
Zijiang Zhao , Songtao Huang , Guanglu Dong , Yi Chen , Mingxuan Wang , Molin Xia , Xin Song , Xiaonian Li , Zhongzhe Wei , Jianguo Wang

The hydrogenation of vanillin stands as a pivotal platform reaction within biomass conversion processes, presenting a significant challenge in achieving controlled synthesis of different products. Here, we proffer different methodology for elaborately designing the electronic structure of Pt via regulating the strong metal-support interactions (SMSI) between Pt and MoTiC, thereby facilitating the targeted synthesis of vanillyl alcohol (VA) and 2-methoxy-4-methylphenol (MMP) from vanillin. Appropriate H reduction can enhance the SMSI between Pt and MoTiC, promoting the electron transfer from MoTiC to Pt, resulting in 200-Pt/MoTiC with 68.1 of Pt. However, the SR-Pt/MoTiC obtained through the galvanic replacement strategy possesses 64.7 % of Pt, which is attributed to the weaker spontaneous SMSI between Pt and MoTiC. XPS adsorption experiments highlight the pivotal role of Pt in facilitating the desorption of VA, resulting in the 200-Pt/MoTiC catalyst demonstrating exceptional selectivity towards VA (96 %). Meanwhile, SR-Pt/MoTiC showcases a predilection for the direct hydrogenation and deoxygenation of vanillin into MMP. This research not only marks the application of the MXene system to biomass conversion but also illuminates the relationship between the electronic structure of Pt and its selectivity towards VA and MMP.

中文翻译:


设计 Pt 的电子结构用于香草醛选择性加氢生成香草醇和对甲酚



香草醛的氢化是生物质转化过程中的关键平台反应,对实现不同产品的受控合成提出了重大挑战。在这里,我们提出了不同的方法,通过调节 Pt 和 MoTiC 之间的强金属-载体相互作用(SMSI)来精心设计 Pt 的电子结构,从而促进香草醇(VA)和 2-甲氧基-4-甲基苯酚的靶向合成。 MMP)来自香草醛。适当的H还原可以增强Pt和MoTiC之间的SMSI,促进电子从MoTiC转移到Pt,从而得到具有68.1 Pt的200-Pt/MoTiC。然而,通过电替代策略获得的SR-Pt/MoTiC拥有64.7%的Pt,这是由于Pt和MoTiC之间的自发SMSI较弱。 XPS 吸附实验强调了 Pt 在促进 VA 解吸中的关键作用,从而使 200-Pt/MoTiC 催化剂表现出对 VA 的卓越选择性 (96%)。同时,SR-Pt/MoTiC 表现出对香草醛直接氢化和脱氧成 MMP 的偏好。该研究不仅标志着MXene系统在生物质转化中的应用,而且阐明了Pt的电子结构与其对VA和MMP选择性之间的关系。
更新日期:2024-08-29
down
wechat
bug