ACS ES&T Engineering,
Journal Year:
2022,
Volume and Issue:
2(6), P. 1068 - 1079
Published: Jan. 25, 2022
H2O2,
as
an
important
chemical
and
environmentally
friendly
oxidant,
has
been
applied
in
various
fields,
such
synthesis,
pulp
bleaching,
disinfection,
environmental
remediation.
Nevertheless,
the
industrial
anthraquinone
process
for
production
of
H2O2
is
energy-intensive
only
suitable
centralized
H2O2.
Photocatalytic
from
O2
reduction
a
promising
approach
on-site
decentralized
synthesis.
Although
photocatalysts
have
developed,
efficiency
still
limited
by
narrow
light
absorption
range,
rapid
charge
recombination,
slow
surface
reaction.
In
this
perspective,
we
briefly
introduce
basic
mechanism
photocatalytic
reduction.
Subsequently,
propose
design
principles
discuss
universal
strategies
enhancing
performance
production,
aspects
absorption,
separation,
catalytic
reaction,
reactor
configurations.
Finally,
present
our
prospects
suggestions
development
future.
We
hope
that
perspective
can
provide
useful
guidance
rational
efficient
novel
advance
both
insights
practical
applications
production.
Advanced Functional Materials,
Journal Year:
2021,
Volume and Issue:
31(46)
Published: Aug. 16, 2021
Abstract
The
demands
for
green
production
of
hydrogen
peroxide
have
triggered
extensive
studies
in
the
photocatalytic
synthesis,
but
most
photocatalysts
suffer
from
rapid
charge
recombination
and
poor
2e
−
oxygen
reduction
reaction
(ORR)
selectivity.
Here,
a
novel
composite
photocatalyst
cyano‐rich
graphitic
carbon
nitride
g‐C
3
N
4
is
fabricated
facile
manner
by
sodium
chloride‐assisted
calcination
on
dicyandiamide.
obtained
exhibit
superior
activity
(7.01
m
h
−1
under
λ
≥
420
nm,
16.05
simulated
sun
conditions)
H
2
O
93%
selectivity
ORR,
much
higher
than
that
state‐of‐the‐art
photocatalyst.
porous
with
Na
dopants
cyano
groups
simultaneously
optimize
two
limiting
steps
ORR:
photoactivity,
can
adjust
band
structure
to
achieve
high
activity.
They
also
serve
as
adsorption
sites,
which
local
polarization
facilitates
protonation.
With
aid
+
,
reduced
produce
more
superoxide
radicals
intermediate
products
synthesis.
This
work
provides
approach
tune
ORR
boosting
production,
then
paves
way
practical
application
environmental
remediation
energy
supply.
Advanced Materials,
Journal Year:
2022,
Volume and Issue:
34(38)
Published: Aug. 9, 2022
Cooperative
coupling
of
photocatalytic
H2
O2
production
with
organic
synthesis
has
an
expansive
perspective
in
converting
solar
energy
into
storable
chemical
energy.
However,
traditional
powder
photocatalysts
suffer
from
severe
agglomeration,
limited
light
absorption,
poor
gas
reactant
accessibility,
and
reusable
difficulty,
which
greatly
hinders
their
large-scale
application.
Herein,
floatable
composite
are
synthesized
by
immobilizing
hydrophobic
TiO2
Bi2
O3
on
lightweight
polystyrene
(PS)
spheres
via
hydrothermal
photodeposition
methods.
The
not
only
transparent,
but
also
upgrade
the
contact
between
reactants
photocatalysts.
Thus,
step-scheme
(S-scheme)
/Bi2
photocatalyst
exhibits
a
drastically
enhanced
yield
1.15
mm
h-1
decent
furfuryl
alcohol
conversion
to
furoic
acid
synchronously.
Furthermore,
S-scheme
mechanism
dynamics
systematically
investigated
situ
irradiated
X-ray
photoelectron
spectroscopy
femtosecond
transient
absorption
spectrum
analyses.
In
Fourier
transform
infrared
density
functional
theory
calculations
reveal
evolution.
ingenious
design
furnishes
insight
maximizing
reaction
kinetics
provides
new
route
for
highly
efficient
heterogeneous
catalysis.
Advanced Materials,
Journal Year:
2021,
Volume and Issue:
33(49)
Published: Sept. 24, 2021
Abstract
Hydrogen
peroxide
(H
2
O
)
is
an
environment‐friendly
and
efficient
oxidant
with
a
wide
range
of
applications
in
different
industries.
Recently,
the
production
hydrogen
through
direct
electrosynthesis
has
attracted
widespread
research
attention,
emerged
as
most
promising
method
to
replace
traditional
energy‐intensive
multi‐step
anthraquinone
process.
In
ongoing
efforts
achieve
highly
large‐scale
H
,
carbon‐based
materials
have
been
developed
2e
−
oxygen
reduction
reaction
catalysts,
benefits
low
cost,
abundant
availability,
optimal
performance.
This
review
comprehensively
introduces
strategies
for
optimizing
toward
production,
latest
advances
hybrid
catalysts.
The
active
sites
influence
coordination
heteroatom
doping
on
selectivity
are
extensively
analyzed.
particular,
appropriate
design
functional
groups
understanding
effect
electrolyte
pH
expected
further
improve
selective
efficiency
producing
via
reaction.
Methods
improving
catalytic
activity
by
interface
engineering
kinetics
summarized.
Finally,
challenges
catalysts
face
before
they
can
be
employed
commercial‐scale
identified,
prospects
designing
novel
electrochemical
reactors
proposed.
Advanced Materials,
Journal Year:
2021,
Volume and Issue:
34(7)
Published: Nov. 24, 2021
The
redox
reaction
centers
in
natural
organisms
conducting
oxygenic
photosynthesis
are
well
arranged
a
physically
separated
manner
to
convert
sunlight
into
chemical
energy
efficiently.
Mimicking
via
precisely
constructing
oxidative
and
reductive
within
photocatalysts
is
ideal
for
enhancing
catalytic
performances
artificial
photosynthesis.
In
this
study,
new
covalent
heptazine
frameworks
(CHFs)
with
spatially
rationally
designed
photocatalytic
production
of
H2
O2
from
water
oxygen
without
using
any
sacrificial
agents.
Both
experimental
computational
investigations
indicate
that
the
two-electron
reduction
occurs
on
moiety,
whereas
oxidation
acetylene
or
diacetylene
bond
CHFs.
This
unique
spatial
separation
feature
critical
charge
achieving
efficient
production.
Meanwhile,
measured
exciton
binding
diacetylene-containing
polymer
merely
24
meV.
Under
simulated
solar
irradiation,
CHFs
can
achieve
solar-to-chemical
conversion
efficiency
0.78%,
surpassing
previously
reported
materials.
study
establishes
molecular
engineering
approach
construct
periodically
single-component
photocatalysts,
representing
hallmark
create
more
exciting
structures
photocatalysis
moving
forward.
Langmuir,
Journal Year:
2021,
Volume and Issue:
37(48), P. 14114 - 14124
Published: Nov. 22, 2021
The
design
of
photocatalysts
with
hierarchical
pore
sizes
is
an
effective
method
to
improve
mass
transport,
enhance
light
absorption,
and
increase
specific
surface
area.
Moreover,
the
construction
a
heterojunction
at
interface
two
semiconductor
suitable
band
positions
plays
crucial
role
in
separating
transporting
charge
carriers.
Herein,
ZIF-8
urea
are
used
as
precursors
prepare
hierarchically
porous
ZnO/g-C3N4
S-scheme
through
two-step
calcination
method.
This
photocatalyst
shows
high
activity
toward
photocatalytic
H2O2
production,
which
3.4
5.0
times
higher
than
that
pure
g-C3N4
ZnO,
respectively.
mechanism
transfer
separation
within
studied
by
Kelvin
probe,
situ
irradiated
X-ray
photoelectron
spectroscopy
(ISI-XPS),
electron
paramagnetic
resonance
(EPR).
research
provides
idea
designing
pores
efficient
hydrogen
peroxide
production.
Nature Communications,
Journal Year:
2023,
Volume and Issue:
14(1)
Published: Aug. 28, 2023
Constructing
photocatalytically
active
and
stable
covalent
organic
frameworks
containing
both
oxidative
reductive
reaction
centers
remain
a
challenge.
In
this
study,
benzotrithiophene-based
with
spatially
separated
redox
are
rationally
designed
for
the
photocatalytic
production
of
hydrogen
peroxide
from
water
oxygen
without
sacrificial
agents.
The
triazine-containing
framework
demonstrates
high
selectivity
H2O2
photogeneration,
yield
rate
2111
μM
h-1
(21.11
μmol
1407
g-1
h-1)
solar-to-chemical
conversion
efficiency
0.296%.
Codirectional
charge
transfer
large
energetic
differences
between
linkages
linkers
verified
in
double
donor-acceptor
structures
periodic
frameworks.
sites
mainly
concentrated
on
electron-acceptor
fragments
near
imine
bond,
which
regulate
electron
distribution
adjacent
carbon
atoms
to
optimally
reduce
Gibbs
free
energy
O2*
OOH*
intermediates
during
formation
H2O2.
