Deep eutectic solvent boosted ruthenium catalysts for acetylene hydrochlorination†

IF 3.2 3区 工程技术 Q2 CHEMISTRY, PHYSICAL Molecular Systems Design & Engineering Pub Date : 2024-04-26 DOI:10.1039/D4ME00045E
Linfeng Li, Bao Wang, Tiantong Zhang, Haiyang Zhang, Wei Li, Jiangjiexing Wu and Jinli Zhang
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Abstract

Despite the potential of Ru-based catalysts to achieve green sustainability in acetylene hydrochlorination, they are plagued by a lack of persistent active sites. Deep eutectic solvents (DESs), considered a novel type of ionic liquid (IL) analogue, can coordinate with metals and adsorb HCl. Hence, to investigate the role of DES in modifying Ru-based catalysts for acetylene hydrochlorination, a range of Ru-DES/AC catalysts were prepared and evaluated for their catalytic performance. The experimental results showed that the formation of DES from a hydrogen bond donor (HBD) and hydrogen bond acceptor (HBA) resulted in a more negative electrostatic potential (ESP) minima and stronger electron-donating ability. The interaction of DES with Ru precursors can effectively modulate the microchemical environment around the Ru active site and improve the dispersion of the active components, thereby boosting the activity of Ru-DES/AC catalysts. The addition of DES not only makes the Ru species more stable but also reduces the formation of coke deposition, thus enhancing the stability of the catalyst. Meanwhile, we found that the synergistic effect between HBD and HBA in DES on the performance enhancement of Ru-based catalysts is universal. Therefore, to scientifically design more efficient catalysts, we evaluated the potential descriptors of DES.

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用于乙炔加氢氯化的深共晶溶剂促进钌催化剂
尽管 Ru 基催化剂在乙炔加氢氯化过程中具有实现绿色可持续发展的潜力,但其缺乏持久的活性位点。深共晶溶剂(DES)被认为是一种新型离子液体(IL)类似物,可与金属配位并吸附 HCl。因此,为了研究 DES 在改性 Ru 基乙炔加氢氯化催化剂中的作用,我们制备了一系列 Ru-DES/AC 催化剂,并对其催化性能进行了评估。实验结果表明,由氢键供体(HBD)和氢键受体(HBA)形成的 DES 会产生更负的静电势(ESP)最小值和更强的电子供体能力。DES 与 Ru 前驱体的相互作用能有效调节 Ru 活性位点周围的微化学环境,改善活性组分的分散性,从而提高 Ru-DES/AC 催化剂的活性。DES 的加入不仅能使 Ru 物种更加稳定,还能减少焦炭沉积的形成,从而提高催化剂的稳定性。同时,我们发现 DES 中的 HBD 和 HBA 对 Ru 基催化剂性能提升的协同作用具有普遍性。因此,为了科学地设计出更高效的催化剂,我们对 DES 的潜在描述因子进行了评估。
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来源期刊
Molecular Systems Design & Engineering
Molecular Systems Design & Engineering Engineering-Biomedical Engineering
CiteScore
6.40
自引率
2.80%
发文量
144
期刊介绍: Molecular Systems Design & Engineering provides a hub for cutting-edge research into how understanding of molecular properties, behaviour and interactions can be used to design and assemble better materials, systems, and processes to achieve specific functions. These may have applications of technological significance and help address global challenges.
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