Advanced   Register
IMR OpenIR  > 中国科学院金属研究所  > 期刊论文

题名: Insight into the chemical adsorption properties of CO molecules supported on Au or Cu and hybridized Au-CuO nanoparticles
作者: Luo, Jingjie;  Liu, Yuefeng;  Niu, Yiming;  Jiang, Qian;  Huang, Rui;  Zhang, Bingsen;  Su, Dangsheng
发表日期: 2017-10-21
摘要: Although nanosized Au clusters have been well developed for many applications, fundamental understanding of their adsorption/activation behaviors in catalytic applications is still lacking, especially when other elements provide promotion or hybridization functions. Au hybridized with Cu element is a highly investigated system; Cu is in the same element group as Au and thus displays similar physicochemical properties. However, their hybrids are not well understood in terms of their chemical states and adsorption/ activation properties. In this work, typical gamma-Al2O3-supported Au and CuO as well as Au-CuO nanoparticles were prepared and characterized to explore their adsorption/activation properties in depth using CO as a probe molecule using advanced techniques, such as XPS, HR-TEM, temperature programmed experiments and operando DRIFT combined with mass spectra. It was found that gold and copper can both act as active sites during CO adsorption and activation. The CO-TPD and operando DRIFT results also revealed that CO molecules were able to react with surface oxygenated species, resulting in the direct formation of CO2 over the three samples in the absence of gaseous O-2. The gold step sites (Austep) participated more readily in the reaction, especially under gaseous O-2-free conditions. During adsorption, CO molecules were more preferentially adsorbed on Au-0 sites at lower temperature comparing with those on the Cu-0 sites. However, competitive adsorption occurred between CO adsorbed on Au-0 and Cu-0 with increased reaction temperature, and the synergy between the Au and Cu compositions was too strong to suppress the adsorption and activation of the CO molecules. The dynamic adsorption equilibrium over 120 degrees C to 200 degrees C resulted in the appearance of a hysteresis performance platform.
Appears in Collections:中国科学院金属研究所_期刊论文

Files in This Item:

There are no files associated with this item.

Recommended Citation:
Luo, Jingjie,Liu, Yuefeng,Niu, Yiming,et al. Insight Into The Chemical Adsorption Properties Of Co Molecules Supported On Au Or Cu And Hybridized Au-cuo Nanoparticles[J]. Royal Soc Chemistry,2017,9(39):15033-15043.

SCI Citaion Data:
 Recommend this item
 Sava as my favorate item
 Show this item's statistics
 Export Endnote File
Google Scholar
 Similar articles in Google Scholar
 [Luo, Jingjie]'s Articles
 [Liu, Yuefeng]'s Articles
 [Niu, Yiming]'s Articles
CSDL cross search
 Similar articles in CSDL Cross Search
 [Luo, Jingjie]‘s Articles
 [Liu, Yuefeng]‘s Articles
 [Niu, Yiming]‘s Articles
Scirus search
 Similar articles in Scirus
Related Copyright Policies
Social Bookmarking
  Add to CiteULike  Add to Connotea  Add to  Add to Digg  Add to Reddit 
所有评论 (0)
内 容:
Email:  *
验证码:   刷新
标 题:
内 容:
Email:  *
验证码:   刷新

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.



Valid XHTML 1.0!
Copyright © 2007-2018  中国科学院金属研究所  -Feedback
Powered by CSpace