引用本文:
【打印本页】   【HTML】   【下载PDF全文】   查看/发表评论  【EndNote】   【RefMan】   【BibTex】
过刊浏览    高级检索
本文已被:浏览 194次   下载 63  
分享到: 微信 更多
Pd/C催化剂在乙炔选择加氢反应中的催化性能:载体效应
马运生
作者单位E-mail
马运生 中国科学技术大学化学物理系 ysma@ustc.edu.cn 
摘要:
通过溶胶凝胶法制备Pd纳米颗粒,并担载到活性炭(AC)、氧化石墨(GO)和还原氧化石墨(RGO)等不同的碳材料载体上制备得到不同的Pd/C催化剂。利用透射电子显微镜(TEM),X-射线衍射(XRD)和X-射线光电子能谱(XPS)等手段对Pd/C催化剂的结构进行了表征,并考察了Pd催化剂在乙炔选择加氢反应中的催化性能。结果表明,不同碳材料载体对Pd基催化剂的选择加氢性能有显著影响。相对于Pd/GO和Pd/RGO,Pd/AC催化剂表现出较高的乙炔转化率和乙烯选择性。同时,对活性炭载体进行热处理和碱处理对负载Pd基催化剂的催化加氢性能也产生了一定影响。上述载体效应可部分归因为金属-载体相互作用所导致的Pd纳米颗粒的化学状态和电子性质的差异。
关键词:  乙炔选择加氢,Pd纳米颗粒,氧化石墨,活性炭,还原氧化石墨,X-射线光电子能谱
DOI:
分类号:
基金项目:
Catalytic performance of carbon materials supported Pd nanoparticles in selective hydrogenation of acetylene: support effect
马运生
Abstract:
Various Pd/C catalysts were prepared by deposited Pd nanoparticles(NPs)on different carbon supports (including activated carbon (AC), graphite oxide (GO) and reduced graphite oxide (RGO)) using sol- immobilization method. On the basis of the results by transmission electron microscopy (TEM), Powder X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS), the role of the support for the catalytic performances of Pd/C catalysts was examined in selective hydrogenation of acetylene.The results indicate that Pd/AC exhibited higher activity and selectivity compared with Pd/GO and Pd/RGO in the gas phase selective hydrogenation of acetylene. Thermal and chemical treatment of AC supports also has some influences on the catalytic performance of Pd/AC catalysts. The difference in the activity and selectivity of various Pd/C catalysts was partly attributed to the metal-support interaction.
Key words:  selective hydrogenation of acetylene, Pd, active carbon, graphite oxide, reduced graphite oxide, XPS