Highly Active AuCu-Based Catalysts for Acetylene Hydrochlorination Prepared Using Organic Aqua Regia
Highly Active AuCu-Based Catalysts for Acetylene Hydrochlorination Prepared Using Organic Aqua Regia
复制标题
使用有机王水制备高活性金铜基乙炔氢氯化催化剂
DOI：
10.3390/ma12081310
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发表时间：
2019-04-02
期刊：
影响因子：
3.4
通讯作者：
Li, Xiaonian
中科院分区：
文献类型：
--
作者：
He, Haihua;Zhao, Jia;Li, Xiaonian
开发一种可持续的工艺来设计和合成一种活性和稳定的乙炔氢氯化催化剂，对于工业氯乙烯单体（VCM）生产来说是具有挑战性的，但也是至关重要的。本文研究了用有机王水（OAR）制备法直接合成Cu-Au-Cu催化剂。与传统的王水（AR）相比，由OAR合成的Cu-Au-Cu催化剂表现出增强的活性和稳定性。在使用X射线衍射图（XRD）、扫描透射电子显微镜（STEM）、X射线光电子能谱（XPS）和程序升温脱附（TPD）仔细表征催化剂样品后，该观察结果是合理的，原因如下：1）硫和氮原子的存在稳定了阳离子Au活性中心，2）OAR通过稳定Cu启动子来维持其功能，对启动子稳定性重要性的深入认识为该领域的研究提供了新的视角。
Development of a sustainable process for designing and synthesising an active and stable catalyst for hydrochlorination of acetylene is challenging, yet crucial, for industrial vinyl chloride monomer (VCM) production. Herein, direct synthesis of bimetallic AuCu catalysts using organic aqua regia (OAR) preparation methods was investigated. In comparison with conventional aqua regia (AR), bimetallic AuCu catalysts synthesised from OAR exhibit enhanced activity and stability. After careful characterisation of the catalyst samples using X-ray diffraction patterns (XRD), Scanning transmission electron microscopy (STEM), X-ray photoelectron spectroscopy (XPS), and Temperature-programmed desorption (TPD), this observation was justified for the following reasons: 1) the existence of sulphur and nitrogen atoms stabilised the cationic Au active sites, and 2) OAR helped to sustain the function of the Cu promotor by stabilising it. Advanced understanding on the importance of promoter stability has unveiled new perspectives for this research area.