Formation of Cu nanoparticles in SBA-15 functionalized with carboxylic acid groups and their application in the water-gas shift reaction

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题名:	Formation of Cu nanoparticles in SBA-15 functionalized with carboxylic acid groups and their application in the water-gas shift reaction
作者:	高憲明;Chen, Ching S;Lai, Yuan T;Lai, Tzu W;Wu, Jia H;Chen, Ching H;Lee, Jyh F;Kao, Hsien M
贡献者:	理學院化學學系
日期:	2013-04-05
上传时间:	2026-04-21 14:08:27 (UTC+8)
出版者:	American Chemical Society
摘要:	摘要： SBA-15 functionalized with carboxylic acid groups has been used to synthesize Cu nanoparticles 2–6 nm in average size with 7.6–25.2 wt % Cu. In this study, the formation mechanism and characterization of Cu nanoparticles at various Cu concentrations are described. For samples with 7.6 and 11.9 wt % Cu, linear [Cuδ+···Oδ−···Cuδ+] n chains generated through calcination are possibly located inside the SBA-15 channels. When the concentration of Cu is increased to 18.3 wt %, the Cu2(OH)3NO3 species becomes the dominant intermediate before bulky CuO is formed. It is found that the average 2-nm Cu particles provided a significantly higher turnover rate for water–gas shift (WGS) reaction than did higher Cu contents on SBA-15. We propose that the highly dispersed Cu particles or isolated Cu atoms on Cu/SBA-15 catalysts can serve as major active sites for the WGS reaction. The 7.6 and 11.9 wt % Cu/SBA-15 catalysts provide abundant sites on highly dispersed Cu particles or isolated Cu atoms, which lead to a highly efficient WGS reaction. 其他題名： ACS Catal 出版者： American Chemical Society 出版日期： 2013-04-05 出處： ACS catalysis, 2013-04, Vol.3 (4), p.667-677 資源來源： American Chemical Society Journals 版權： Copyright © 2013 American Chemical Society 識別號： ISSN: 2155-5435 識別號： EISSN: 2155-5435 識別號： DOI: 10.1021/cs400032e
显示于类别:	[化學學系] 期刊論文

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