Synergy of Ni single atoms and NiO nanoclusters in carbon nitride to create local charge polarization for enhanced CO2 photoreduction
Chemical Engineering Journal,
Год журнала:
2025,
Номер
unknown, С. 160101 - 160101
Опубликована: Фев. 1, 2025
Язык: Английский
Ladder‐Like Built‐In Electric Field Enhances Self‐Assembly, Carrier Separation and Ultra‐Efficient Photocatalytic Oxygen Reduction
Advanced Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 24, 2025
Abstract
Semiconductor
heterojunctions
can
significantly
enhance
the
separation
of
photogenerated
charge
carriers,
among
which
Z‐type
are
more
conducive
to
photocatalysis
due
their
special
transfer
paths
and
strong
oxidizing
reducing
properties.
However,
introducing
efficient
active
sites
has
always
been
a
significant
challenge
in
improvement
heterogeneous
photocatalysts.
Herein,
through
in‐depth
analysis
reaction
mechanism
structural
characteristics,
single
atom
catalysts
ingeniously
integrated
using
built‐in
electric
fields.
For
first
time,
suitable
metal
successfully
designed
under
electronic
structure
at
N‐terminal,
utilizing
low
electronegativity
non‐metallic
element
doping
counteract
local
electron
migration
from
heterojunctions.
Ladder‐like
field
composed
divergent
parallel
fields
respectively,
introduces
new
carrier
path.
AgPCN/BCN
heterojunction
reaches
hydrogen
peroxide
(H
2
O
)
yield
559.5
µM∙h
−1
an
apparent
quantum
efficiency
17.8%
2e
−
oxygen
reduction
reaction.
Photoelectrochemical
tests
indicate
importance
4e
water
oxidation
as
auxiliary
This
novel
innovative
photocatalyst
brings
approaches
for
photocatalysts
improvement,
insights
into
role
photocatalytic
mechanisms.
Язык: Английский
Facilitating Charge Separation of Donor–Acceptor Conjugated Microporous Polymers via Position Isomerism Strategy for Efficient CO2 Photoconversion
Catalysts,
Год журнала:
2024,
Номер
14(10), С. 659 - 659
Опубликована: Сен. 24, 2024
Photoreduction
of
CO2
into
the
chemical
feedstocks
fuels
provides
a
green
way
to
help
solve
both
energy
crisis
and
carbon
emission
issues.
Nevertheless,
undesirable
charge
separation
migration,
as
well
rapid
reverse
recombination
results
in
unsatisfactory
photocatalytic
activity
most
conjugated
microporous
polymers
(CMPs).
Herein,
pair
donor–acceptor
(D-A)
CMPs
for
photoconversion
was
developed
through
position
isomerism
by
altering
linkage
sites.
The
show
that
Py-D27F
with
2,7-site
exhibits
completely
structure
large
molecular
dipole
moment,
thus
significantly
accelerating
transfer.
As
result,
achieves
higher
yield
320.9
μmol
g−1
h−1
CO2-to-CO
photoreduction
(without
addition
any
photosensitizers
precious
metals),
which
is
about
three-fold
greater
than
Py-D36F
(3,6-site
linkage).
This
study
valuable
idea
exploring
outstanding
CMP
photocatalysts
efficient
processing
photocatalysis.
Язык: Английский
Optimizing the n -type carrier concentration of an InVO4 photocatalyst by codoping with donors and intrinsic defects
Physical Review Applied,
Год журнала:
2024,
Номер
22(4)
Опубликована: Окт. 18, 2024
Although
indium
vanadate
(${\mathrm{InVO}}_{4}$)
is
an
excellent
n-type
semiconductor,
a
controlled
carrier
concentration
of
the
${\mathrm{InVO}}_{4}$
photocatalyst
required
to
enhance
its
photocatalytic
activity.
This
study
systematically
explores
self-consistent
Fermi
energies,
dominant
intrinsic
defects,
electron
(${n}_{0}$),
and
defect
using
density-functional
theory
coupled
with
detailed
thermodynamic
equilibrium
simulations.
The
results
indicate
that
${\mathrm{V}}_{\mathrm{In}}$
antisite
(the
vanadium
atom
replacing
atom)
in
${\mathrm{InVO}}_{4}$.
calculated
energy
pinning
position
indicates
has
doping
behavior
from
defects
under
$\mathrm{O}$-poor
growth
conditions,
consistent
experiments.
Interestingly,
donor
(${D}^{+}$)
positive
for
improving
${n}_{0}$
intrinsic-defect-doped
Therefore,
at
300
K,
broad
optimized
chemical
potential
region
(OCPR)
obtained
codoped
donors
defects.
In
this
OCPR,
higher,
without
recombination
centers
significant
compensation,
significantly
enhancing
activity
However,
case
temperature
873
K
after
quenching
OCPR
much
narrower
than
indicating
higher
temperatures
may
adversely
affect
OCPR.
Our
provide
deep
insights
into
behaviors
suggest
strategies
conductivity
properties,
offering
new
opportunities
manipulating
performance
Язык: Английский