Anchoring Pd species over defective alumina to achieve high atomic utilization and tunable electronic structure for semi-hydrogenation of acetylene

被引：14

作者：

Xu, Longyu ^{[1
]}

Hua, Shuya ^{[1
]}

Zhou, Jing ^{[1
]}

Xu, Yiqi ^{[1
]}

Lu, Chunshan ^{[1
]}

Feng, Feng ^{[1
]}

Zhao, Jia ^{[1
]}

Xu, Xiaoliang ^{[1
]}

Wang, Qingtao ^{[1
]}

Zhang, Qunfeng ^{[1
]}

Li, Xiaonian ^{[1
]}

机构：

[1] Zhejiang Univ Technol, State Key Lab Breeding Base Green Chem Synth Tech, Inst Ind Catalysis, Hangzhou 310014, Peoples R China

来源：

APPLIED CATALYSIS A-GENERAL | 2022年 / 642卷

基金：

中国国家自然科学基金;

关键词：

Penta-coordinated aluminum; Dispersion; Metal-support interaction; Pd catalyst; Semi-hydrogenation of acetylene; SELECTIVE HYDROGENATION; PALLADIUM NANOPARTICLES; AL3+ IONS; CATALYSTS; SITES; PD/TIO2; TIO2; RICH;

D O I：

10.1016/j.apcata.2022.118690

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Semi-hydrogenation of acetylene is one of the most promising methods to eliminate acetylene from ethylene/acetylene mixtures to avoid Ziegler-Natta polymerization catalysts being poisoned. Given that acetylene is always over-hydrogenated on conventional palladium-based catalyst, it is of great importance to facilitate the desorption of ethylene to enhance the ethylene selectivity. Herein, we report a simple method to anchor Pd by unsaturated penta-coordinated aluminum (Al-penta(3+)) on Al2O3 (meso-Al2O3). Characterized by Al-27-NMR, XRD, HR-TEM, CO chemisorption and XPS, Pd/meso-Al2O3 catalyst had a highly dispersion and unique electronic property of Pd, thus exhibiting a high ethylene selectivity (similar to 83%) while the acetylene conversion is > 99%. Besides, the agglomeration of Pd is suppressed by the metal-support interaction (MSI) between Pd and meso Al2O3 support. Therefore, the preparation method of the catalyst is relatively simple and has certain commercial application prospects.

引用

页数：7

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