Selectivity switch in transformation of CO2 from ethanol to methanol on Cu embedded in the defect carbon

• 作者: Govindarajan Saranya Mingyang Chen Shuohao Li Yan Zhu
• 来源期刊: 中国科学:化学（英文版）
• 年，卷（期）: 2020,（5）
• 页码范围: 722-730
• 页数: 9页
• 语种: 英文

摘要

The copper-based catalysts have been generally regarded as high-performance catalysts for CO2 hydrogenation toward methanol,while the production of ethanol via C-C coupling on the copper-based catalysts is still challenging.Herein,we report a new catalyst where Cu nanoparticles are embedded in the carbon support with abundant defect sites,achieving a high selectivity for ethanol in the CO2 hydrogenation.The experiments coupled with the theoretical studies show a clear map where carbon defects serve as anchor sites that can stabilize interfacial copper species,and interfacial Cu sites with low coordination numbers can adsorb two C1 species and later convert them to a C2 species via a hydrogenation-induced coupling reaction.Further adjacent Cu atoms of interfacial Cu sites can facilitate OH reduction reactions via the Cu-Cu bridge adsorption to assist the formation of ethanol.Especially,those specific active sites easily disappear in the reducing conditions and during the reaction,the major product can transform from ethanol to methanol.

作者信息

序号	姓名	单位	发文数	被引次数	H指数	G指数
1	Shuohao Li		1	0	0.0	0.0
2	Govindarajan Saranya		1	0	0.0	0.0
3	Mingyang Chen		1	0	0.0	0.0
4	Yan Zhu		1	0	0.0	0.0