Abstract
Photoelectrochemical
(PEC)
water
splitting
represents
an
attractive
strategy
to
realize
the
conversion
from
solar
energy
hydrogen
energy,
but
severe
charge
recombination
in
photoanodes
significantly
limits
efficiency.
Herein,
a
unique
BiVO
4
(BVO)
nanobowl
(NB)
heterojunction
photoanode,
which
consists
of
[001]‐oriented
BiOCl
underlayer
and
BVO
nanobowls
containing
embedded
nanocrystals,
is
fabricated
by
nanosphere
lithography
followed
situ
transformation.
Experimental
characterizations
theoretical
simulation
prove
that
morphology
can
effectively
enhance
light
absorption
while
reducing
carrier
diffusion
path.
Density
functional
theory
(DFT)
calculations
show
tendency
electron
transfer
BiOCl.
The
forms
compact
type
II
with
BVO,
favoring
through
substrate.
Furthermore,
nanoparticles
form
bulk
facilitate
transfer.
Consequently,
dual
heterojunctions
engineered
BVO/BiOCl
NB
photoanode
exhibits
PEC
performance
toward
oxidation
excellent
separation
efficiency
95.5%,
remarkable
photocurrent
density
3.38
mA
cm
−2
at
1.23
V
versus
reversible
electrode,
fourfold
enhancement
compared
flat
counterpart.
This
work
highlights
great
potential
integrating
engineering
fabricating
high‐performance
photoelectrodes
efficient
conversion.
ACS Nano,
Год журнала:
2023,
Номер
17(23), С. 23478 - 23487
Опубликована: Ноя. 27, 2023
Solar-driven
water
splitting
powered
by
photovoltaics
enables
efficient
storage
of
solar
energy
in
the
form
hydrogen
fuel.
In
this
work,
we
demonstrate
solar-to-hydrogen
conversion
using
perovskite
(PVK)
tandem
and
a
halogen-modulated
metal-organic
framework
(MOF)
electrocatalyst.
By
substituting
tetrafluoroterephthalate
(TFBDC)
for
terephthalic
(BDC)
ligands
nickel-based
MOF,
achieve
152
mV
improvement
oxygen
evolution
reaction
(OER)
overpotential
at
10
mA·cm2.
Through
X-ray
photoelectron
spectroscopy
(XPS),
adsorption
structure
(XAS)
analysis,
theoretical
simulation,
electrochemical
results,
demonstrated
that
introduction
fluorine
atoms
enhanced
intrinsic
activity
Ni
sites
as
well
transfer
property
accessibility
MOF.
Using
electrocatalyst
bias-free
photovoltaic
(PV-EC)
system
with
PVK/organic
cell,
6.75%
efficiency
(ηSTH).
We
also
paired
PVK
module
to
drive
206.7
mA
ηSTH
10.17%.
CrystEngComm,
Год журнала:
2023,
Номер
25(35), С. 4939 - 4945
Опубликована: Янв. 1, 2023
Compared
with
cubic
Cu
2
O,
the
O/Cu
S
composite
exhibits
better
photocatalytic
hydrogen
production.
The
catalytic
production
of
heterostructure
reached
1076.95
μmol
g
−1
after
5
h
illumination.
Abstract
Photoelectrochemical
(PEC)
water
splitting
represents
an
attractive
strategy
to
realize
the
conversion
from
solar
energy
hydrogen
energy,
but
severe
charge
recombination
in
photoanodes
significantly
limits
efficiency.
Herein,
a
unique
BiVO
4
(BVO)
nanobowl
(NB)
heterojunction
photoanode,
which
consists
of
[001]‐oriented
BiOCl
underlayer
and
BVO
nanobowls
containing
embedded
nanocrystals,
is
fabricated
by
nanosphere
lithography
followed
situ
transformation.
Experimental
characterizations
theoretical
simulation
prove
that
morphology
can
effectively
enhance
light
absorption
while
reducing
carrier
diffusion
path.
Density
functional
theory
(DFT)
calculations
show
tendency
electron
transfer
BiOCl.
The
forms
compact
type
II
with
BVO,
favoring
through
substrate.
Furthermore,
nanoparticles
form
bulk
facilitate
transfer.
Consequently,
dual
heterojunctions
engineered
BVO/BiOCl
NB
photoanode
exhibits
PEC
performance
toward
oxidation
excellent
separation
efficiency
95.5%,
remarkable
photocurrent
density
3.38
mA
cm
−2
at
1.23
V
versus
reversible
electrode,
fourfold
enhancement
compared
flat
counterpart.
This
work
highlights
great
potential
integrating
engineering
fabricating
high‐performance
photoelectrodes
efficient
conversion.
