Yin and Yang Dual Characters of CuOx Clusters for C-C Bond Oxidation Driven by Visible Light

doi:10.1021/acscatal.7b00629

	Yin and Yang Dual Characters of CuOx Clusters for C-C Bond Oxidation Driven by Visible Light
	Hou, Tingting 1,2; Luo, Nengchao 1,2; Li, Hongji 1,2; Heggen, Marc 3,4; Lu, Jianmin 1; Wang, Yehong 1; Wang, Feng 1
刊名	ACS CATALYSIS
	2017-06-01
卷号	7 页码:3850-3859
关键词	Heterogeneous Catalysis Visible Light Ceria Copper Titania C-c Bond Benzaldehyde
DOI	10.1021/acscatal.7b00629
英文摘要	Selective cleavage of C-C bonds is pursued as a useful chemical transformation method in biomass utilization. Herein, we report a hybrid CuOx/ceria/anatase nanotube catalyst in the selective oxidation of C-C bonds under visible light irradiation. Using the lignin fi-1 model as a substrate offers 96% yields of benzaldehydes. Characterization results by high angle annular dark field scanning transmission electron microscopy (HAADF-STEM) and energy-dispersive X-ray spectroscopy element (EDX) mapping reveal that CuOx clusters are highly dispersed on the exposed anatase surface as well as on the nanosized ceria domains. In-depth investigations by Raman and ultraviolet visible diffuse reflectance spectra (UV vis DRS), together with density functional theory (DFT) calculations, further verify that the CuOx clusters present on the ceria domains increase the concentration of surface defects (Ce3+) ions and oxygen vacancies) and accordingly improve the photocatalytic activity (Yang character); the CuOx clusters decorating on anatase suppress the side reaction (oxydehydrogenation without C-C bond cleavage) because of an upward shift in the valence band (VB) edge of anatase (Yin character). Mechanism investigation indicates hydrogen abstraction from beta-carbon by photogenerated holes is a vital step in the conversion.
语种	英语
WOS记录号	WOS:000402851600014
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/152188]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
作者单位	1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Forschungszentrum Julich GmbH, Ernst Ruska Ctr Microscopy & Spect Electrons, D-52425 Julich, Germany 4.Forschungszentrum Juelich GmbH, Peter Grunberg Inst, D-52425 Julich, Germany
推荐引用方式 GB/T 7714	Hou, Tingting,Luo, Nengchao,Li, Hongji,et al. Yin and Yang Dual Characters of CuOx Clusters for C-C Bond Oxidation Driven by Visible Light[J]. ACS CATALYSIS,2017,7:3850-3859.
APA	Hou, Tingting.,Luo, Nengchao.,Li, Hongji.,Heggen, Marc.,Lu, Jianmin.,...&Wang, Feng.(2017).Yin and Yang Dual Characters of CuOx Clusters for C-C Bond Oxidation Driven by Visible Light.ACS CATALYSIS,7,3850-3859.
MLA	Hou, Tingting,et al."Yin and Yang Dual Characters of CuOx Clusters for C-C Bond Oxidation Driven by Visible Light".ACS CATALYSIS 7(2017):3850-3859.