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@ARTICLE{Hou:837916,
author = {Hou, Tingting and Luo, Nagchao and Li, Hongji and Heggen,
Marc and Lu, Jianmin and Wang, Yehong and Wang, Feng},
title = {{Y}in and {Y}ang {D}ual {C}haracters of {C}u{O}x {C}lusters
for {C}-{C} {B}and {O}xidation {D}riven by {V}isible
{L}ight},
journal = {ACS catalysis},
volume = {7},
number = {6},
issn = {2155-5435},
address = {Washington, DC},
publisher = {ACS},
reportid = {FZJ-2017-06686},
pages = {3850 - 3859},
year = {2017},
abstract = {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 β-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 (oxy-dehydrogenation
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
β-carbon by photogenerated holes is a vital step in the
conversion.},
cin = {ER-C-1},
ddc = {540},
cid = {I:(DE-Juel1)ER-C-1-20170209},
pnm = {143 - Controlling Configuration-Based Phenomena (POF3-143)},
pid = {G:(DE-HGF)POF3-143},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000402851600014},
doi = {10.1021/acscatal.7b00629},
url = {https://juser.fz-juelich.de/record/837916},
}