MOF作模板制备多孔Au/CuxO催化剂及其CO氧化性能

doi:10.11949/j.issn.0438-1157.20160002

化工学报 ›› 2016, Vol. 67 ›› Issue (6): 2325-2331.DOI: 10.11949/j.issn.0438-1157.20160002

• 催化、动力学与反应器 • 上一篇下一篇

MOF作模板制备多孔Au/Cu_xO催化剂及其CO氧化性能

刘朋飞, 张所瀛, 杨祝红, 陆小华

南京工业大学化学化工学院, 材料化学工程国家重点实验室, 江苏南京 210009

收稿日期:2016-01-03 修回日期:2016-01-27 出版日期:2016-06-05 发布日期:2016-06-05
通讯作者: 杨祝红
基金资助:
国家自然科学基金项目(21136001);国家重点基础研究发展计划项目(2013CB733503);江苏高校优势学科建设工程资助项目。

MOF-templated preparation of porous Au/Cu_xO catalysts with octahedral structures for CO oxidation

LIU Pengfei, ZHANG Suoying, YANG Zhuhong, LU Xiaohua

State Key Laboratory of Materials-Oriented Chemical Engineering, School of Chemistry and Chemical Engineering, Nanjing Tech University, Nanjing 210009, Jiangsu, China

Received:2016-01-03 Revised:2016-01-27 Online:2016-06-05 Published:2016-06-05
Supported by:
supported by the National Natural Science Foundation of China (21136001), the National Basic Research Program of China (2013CB733503) and the Project of Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).

摘要/Abstract

摘要：

采用MOF材料作模板,通过在Cu-BTC材料表面预先负载贵金属Au再热解的方法,成功制备了具有正八面体结构的新型多孔Au/Cu_xO负载型催化剂。通过降低热解环境中的O₂浓度,调节氧化时间,实现了Au/Cu-BTC氧化产物组分的调节,分别制得了Au/Cu₂O、Au/Cu₂O-CuO、Au/CuO复合催化材料。将其用于CO催化氧化,发现所有Au/Cu_xO催化剂都表现出比Cu-BTC和Au/Cu-BTC更优异的催化性能,其中由于拥有较高的比表面积、Cu₂O含量以及更好的Au的分散性,Au/Cu₂O的CO氧化活性最佳,180℃即能实现CO的完全转化。

关键词: 金属-有机骨架材料, 催化剂, 纳米结构, 多孔材料, Cu-BTC, Au/Cu₂O

Abstract:

More recently, metal-organic frameworks (MOFs), as a excellent sacrificial template, have been widely used to fabricate a variety of porous metal oxides with special structures and performances. To take full advantage of MOFs in composition regulation, herein a novel method to prepare porous Au/Cu_xO composites with octahedral structures inherited from MOFs was introduced. Au/Cu-BTC was firstly prepared by the traditional deposition-precipitation method. Subsequently, pyrolysis of Au/Cu-BTC was conducted in 2% (volume fraction) O₂ balanced with helium. By varying the time of heating, Au/Cu_xO composites including Au/Cu₂O, Au/Cu₂O-CuO and Au/CuO were successfully achieved. When tested in CO oxidation, these supported catalysts exhibited much better catalytic performances than Cu-BTC and Au/Cu-BTC due to the more active support of metal oxides. Thus, Au/Cu₂O showed the best catalytic activity since the high surface area, Cu₂O content and better dispersion of Au.

Key words: metal-organic frameworks, catalyst, nanostructure, porous material, Cu-BTC, Au/Cu₂O

中图分类号:

O643
TQ426

刘朋飞, 张所瀛, 杨祝红, 陆小华. MOF作模板制备多孔Au/Cu_xO催化剂及其CO氧化性能[J]. 化工学报, 2016, 67(6): 2325-2331.

LIU Pengfei, ZHANG Suoying, YANG Zhuhong, LU Xiaohua. MOF-templated preparation of porous Au/Cu_xO catalysts with octahedral structures for CO oxidation[J]. CIESC Journal, 2016, 67(6): 2325-2331.

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MOF作模板制备多孔Au/Cu_xO催化剂及其CO氧化性能

MOF-templated preparation of porous Au/Cu_xO catalysts with octahedral structures for CO oxidation

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MOF作模板制备多孔Au/CuxO催化剂及其CO氧化性能

MOF-templated preparation of porous Au/CuxO catalysts with octahedral structures for CO oxidation

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MOF作模板制备多孔Au/Cu_xO催化剂及其CO氧化性能

MOF-templated preparation of porous Au/Cu_xO catalysts with octahedral structures for CO oxidation