Inspired
by
natural
photosynthesis,
harnessing
the
wide
range
of
solar
energy
and
utilizing
appropriate
semiconductor-based
catalysts
to
convert
carbon
dioxide
into
beneficial
species,
for
example,
CO,
CH4
,
HCOOH,
CH3
COH
have
been
shown
be
a
sustainable
more
environmentally
friendly
approach.
Graphitic
nitride
(g-C3
N4
)
has
regarded
as
highly
effective
photocatalyst
CO2
reduction
reaction,
owing
its
cost-effectiveness,
high
thermal
chemical
stability,
visible
light
absorption
capability,
low
toxicity.
However,
weaker
electrical
conductivity,
fast
recombination
rate,
smaller
window,
reduced
surface
area
make
this
catalytic
material
unsuitable
commercial
photocatalytic
applications.
Therefore,
certain
procedures,
including
elemental
doping,
structural
modulation,
functional
group
adjustment
g-C3
addition
metal
complex
motif,
others,
may
used
improve
activity
towards
reduction.
This
review
investigated
scientific
community's
perspectives
on
synthetic
pathways
optimization
approaches
increase
selectivity
efficiency
-based
hybrid
structures,
well
their
benefits
drawbacks
Finally,
concludes
comparative
discussion
presents
promising
picture
future
scope
improvements.
Constructing
a
built-in
electric
field
(BIEF)
within
heterostructures
has
emerged
as
compelling
strategy
for
advancing
electrocatalytic
oxygen
evolution
reaction
(OER)
performance.
Herein,
the
p-n
type
nanosheet
array
heterojunction
Ni2P-NCDs-Co(OH)2-NF
are
successfully
prepared.
The
variation
in
interaction
affinity
between
nitrogen
N-doped
carbon
dots
(NCDs)
and
Ni/Co
induces
charge
redistribution
Co
Ni
Ni2P-NCDs-Co(OH)2-NF-3
heterostructure,
thereby
enhancing
intensity
of
BIEF,
facilitating
electron
transfer,
markedly
improving
OER
activity.
optimized
electrocatalyst,
Ni2P-NCDs-Co(OH)2-NF-3,
demonstrates
remarkably
low
overpotential
389
mV
at
500
mA
cm-2,
alongsides
small
Tafel
slope
65
dec-1,
expansive
electrochemical
active
surface
area
(ECSA),
impedance,
outstanding
stability
exceeding
425
h
Faradaic
efficiency
up
to
96%.
In
situ
Raman
spectroscopy
density
functional
theoretical
(DFT)
calculations
elucidate
mechanism,
revealing
that
enhanced
BIEF
optimizes
adsorption
energy
Co3+
OH-
weakened
desorption
during
reaction.
work
ponieeringly
employed
NCDs
regulator
effectively
tuning
achieving
superior
performance
under
large
current
density,
thus
charting
new
pathways
development
high-efficiency
electrocatalysts.
The
identity
of
charge
transfer
process
at
the
heterogeneous
interface
plays
an
important
role
in
improving
stability,
activity,
and
selectivity
heterojunction
catalysts.
And,
situ
irradiation
X-ray
photoelectron
spectroscopy
(XPS)
coupled
with
UV
light
optical
fiber
measurement
setup
is
developed
to
monitor
observe
between
heterojunction.
However,
in-depth
relationship
binding
energy
wavelength
missing
based
on
fact
that
incident
formed
by
coupling
different
wavelengths.
Furthermore,
a
quantitative
understanding
numbers
remains
elusive.
Herein,
g-C3
N4
/SnO2
model
catalyst,
wavelength-dependent
Boltzmann
function
describe
changes
through
utilizing
continuously
adjustable
monochromatic
XPS
technique
established.
Using
this
method,
study
further
reveals
electrons
number
can
be
readily
calculated
forming
asymptotic
model.
This
methodology
provides
blueprint
for
deep
charge-transfer
rules
facilitates
future
development
highly
active
advanced
ACS Catalysis,
Год журнала:
2022,
Номер
12(24), С. 15157 - 15167
Опубликована: Ноя. 28, 2022
In
the
design
of
photocatalysts
for
C(sp3)–H
selective
oxidation,
photogenerated
holes
have
been
regarded
as
critical
dissociation.
However,
poor
charge-transfer
efficiency
restricts
localization
on
surface
catalyst.
Herein,
a
Z-scheme
structure
modulated
by
interfacial
chemical
bonding
is
constructed
via
in
situ
growth
Cs3Bi2Br9
nanodots
(CBB)
defective
BiOBr
nanosheets
(d-BiOBr)
photocatalytic
toluene
oxidation.
Benefited
from
internal
electric
field,
Bi–Br
bond
becomes
direct
channel
to
accelerate
electron
transfer
conduction
band
d-BiOBr
valence
CBB,
resulting
higher
charges
CBB/d-BiOBr.
By
diffuse
reflectance
infrared
Fourier
transform
spectroscopy,
paramagnetic
resonance,
and
density
functional
theory
calculations,
proved
be
essential
adsorption
dissociation
bond.
The
optimized
CBB/d-BiOBr
performs
well
oxidation
benzaldehyde
benzyl
alcohol,
giving
conversion
rate
up
72.3
μmol
h–1
selectivity
nearly
100%.
activity
26.6-fold
6.8-fold
that
pristine
respectively.
ACS Materials Letters,
Год журнала:
2022,
Номер
5(1), С. 60 - 78
Опубликована: Дек. 1, 2022
Metal
halide
perovskites
have
attracted
extensive
attention
in
the
field
of
photocatalysis,
because
their
excellent
photophysical
properties,
including
high
optical
absorption
coefficients,
tunable
band
structures,
and
long
carrier
diffusion
lengths.
The
application
prospect
conventional
lead-based
is
restricted
by
toxicity
instability
issues.
Therefore,
it
imperative
to
develop
environmentally
friendly
stable
lead-free
(LFHPs)
for
photocatalysis.
In
recent
years,
rapid
development
LFHPs
has
provided
new
opportunities
photocatalytic
applications,
ranging
from
solar-to-chemical
energy
conversion
organic
reactions.
this
Review,
we
summarize
progresses
with
an
emphasis
on
strategies
available
improve
performance
stability.
Furthermore,
present
outlook
future
directions
challenges
emerging
field.
Inspired
by
natural
photosynthesis,
harnessing
the
wide
range
of
solar
energy
and
utilizing
appropriate
semiconductor-based
catalysts
to
convert
carbon
dioxide
into
beneficial
species,
for
example,
CO,
CH4
,
HCOOH,
CH3
COH
have
been
shown
be
a
sustainable
more
environmentally
friendly
approach.
Graphitic
nitride
(g-C3
N4
)
has
regarded
as
highly
effective
photocatalyst
CO2
reduction
reaction,
owing
its
cost-effectiveness,
high
thermal
chemical
stability,
visible
light
absorption
capability,
low
toxicity.
However,
weaker
electrical
conductivity,
fast
recombination
rate,
smaller
window,
reduced
surface
area
make
this
catalytic
material
unsuitable
commercial
photocatalytic
applications.
Therefore,
certain
procedures,
including
elemental
doping,
structural
modulation,
functional
group
adjustment
g-C3
addition
metal
complex
motif,
others,
may
used
improve
activity
towards
reduction.
This
review
investigated
scientific
community's
perspectives
on
synthetic
pathways
optimization
approaches
increase
selectivity
efficiency
-based
hybrid
structures,
well
their
benefits
drawbacks
Finally,
concludes
comparative
discussion
presents
promising
picture
future
scope
improvements.
