Preparation of ultrathin two-dimensional nanosheet Ni/TiO2-SC catalyst and their catalytic performance in the liquid-phase hydrogenation of maleic anhydride

IF 3.4 3区工程技术 Q2 CHEMISTRY, PHYSICAL

Journal of Supercritical Fluids Pub Date : 2025-02-26 DOI:10.1016/j.supflu.2025.106573

Yin Zhang, Wei Wei, Chengliang Wang, Di Zhang, Haitao Li, Dongjie Zhang, Yue Zhang

引用次数: 0

Abstract

An ultrathin two-dimensional (2D) nanosheet Ni/TiO₂-SC catalyst was synthesised through supercritical ethanol stripping, using Ni-Ti-layered double hydroxide (NiTi-LDH) as the precursor. Characterisation of the catalysts was conducted using XRD, N₂ physical adsorption–desorption, SEM, HR–TEM, AFM, H₂–TPD, XPS, and EPR to evaluate their catalytic activity for the liquid-phase hydrogenation of maleic anhydride (MA). The catalytic performance of Ni/TiO₂-SC was compared with that of the Ni/TiO₂ catalyst without supercritical stripping. Results indicated that the Ni/TiO₂-SC catalysts featured a two-dimensional nanosheet structure with enhanced active metal dispersion and a high density of oxygen vacancies (OV) on the surface, showing superior CC hydrogenation and CO hydrogenolysis activities.

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超薄二维纳米片Ni/TiO2-SC催化剂的制备及其在马来酸酐液相加氢中的催化性能

以Ni- ti层状双氢氧化物（NiTi-LDH）为前驱体，采用超临界乙醇汽提法制备了超薄二维（2D）纳米片Ni/TiO2-SC催化剂。采用XRD、N2物理吸附-脱附、SEM、HR-TEM、AFM、H2-TPD、XPS和EPR对催化剂进行了表征，评价了催化剂对马来酸酐（MA）液相加氢的催化活性。比较了Ni/TiO2- sc催化剂与未进行超临界汽提的Ni/TiO2催化剂的催化性能。结果表明，Ni/TiO2-SC催化剂具有二维纳米片结构，活性金属分散增强，表面氧空位（OV）密度高，具有优异的CC加氢和CO氢解活性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Supercritical Fluids 工程技术-工程：化工

CiteScore

7.60

自引率

10.30%

发文量

236

审稿时长

56 days

期刊介绍： The Journal of Supercritical Fluids is an international journal devoted to the fundamental and applied aspects of supercritical fluids and processes. Its aim is to provide a focused platform for academic and industrial researchers to report their findings and to have ready access to the advances in this rapidly growing field. Its coverage is multidisciplinary and includes both basic and applied topics. Thermodynamics and phase equilibria, reaction kinetics and rate processes, thermal and transport properties, and all topics related to processing such as separations (extraction, fractionation, purification, chromatography) nucleation and impregnation are within the scope. Accounts of specific engineering applications such as those encountered in food, fuel, natural products, minerals, pharmaceuticals and polymer industries are included. Topics related to high pressure equipment design, analytical techniques, sensors, and process control methodologies are also within the scope of the journal.