iScience,
Journal Year:
2024,
Volume and Issue:
27(4), P. 109551 - 109551
Published: March 22, 2024
Highlights•Keggin
POM
was
entrapped
for
the
first
time
in
a
sol-gel
matrix•The
Co-POM-TMOS
electrode
could
be
reused
OER
more
than
90
days•The
matrix
stabilizes
Co-POM
under
electrochemical
conditions
at
pH
2SummaryPolyoxometalates
(POMs)
have
been
well
studied
and
explored
electro/photochemical
water
oxidation
catalysis
over
decade.
The
high
solubility
of
POMs
has
limited
its
use
homogeneous
conditions.
Over
last
decade,
different
approaches
used
heterogenization
to
exploit
their
catalytic
properties.
This
study
focused
on
Keggin
POM,
K6[CoW12O40],
which
heterogeneous
oxidation.
Its
entrapment
enables
it
catalyze
oxygen
evolution
reaction
acidic
pH,
2.0.
Heterogenization
using
method
aids
POM's
recyclability
structural
stability
prepared
is
robust
stable.
It
achieved
current
density
2
mA/cm2
low
overpotential
300
mV
with
turnover
frequency
(TOF)
1.76
[mol
O2
(mol
Co)−1s−1].
A
plausible
mechanism
electrocatalytic
process
presented.Graphical
abstract
ACS Catalysis,
Journal Year:
2023,
Volume and Issue:
13(20), P. 13167 - 13180
Published: Sept. 28, 2023
Covalent–organic
frameworks
(COFs),
as
promising
metal-free
porous
catalysts,
have
become
a
hot
research
topic
in
the
field
of
(photo)catalysis.
Herein,
series
β-ketoenamine
COFs
are
synthesized
using
different
amino
and
aldehyde
monomers,
these
exhibit
diverse
characteristics
terms
crystallinity,
chemical
structure,
microscopic
morphology,
optoelectronic
properties.
TpBD-(CH3)2
from
2,4,6-triformylphloroglucinol
o-tolidine
exhibits
an
extended
π-conjugated
structure
higher
crystallinity
well
more
suitable
redox
potential,
which
greatly
enhances
photocatalytic
activity
benzylamine
oxidation.
Besides,
increased
number
hydroxyl
groups
on
trialdehyde-based
monomer
contributes
to
ketoamines
TpTAB
skeleton,
is
favorable
for
photocatalysis.
Meanwhile,
can
rapidly
increase
their
own
temperature
through
internal
structural
evolution
under
light
irradiation,
thus
boosting
oxidative
coupling
amines
with
high
efficiency.
This
work
could
provide
some
guidance
rational
design
functional
advanced
organic
transformations.
ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(8), P. 10238 - 10250
Published: Feb. 19, 2024
The
electrochemical
conversion
of
oxygen
holds
great
promise
in
the
development
sustainable
energy
for
various
applications,
such
as
water
electrolysis,
regenerative
fuel
cells,
and
rechargeable
metal-air
batteries.
Oxygen
electrocatalysts
are
needed
that
both
highly
efficient
affordable,
since
they
can
serve
alternatives
to
costly
precious-metal-based
catalysts.
This
aspect
is
particularly
significant
their
practical
implementation
on
a
large
scale
future.
Herein,
porous
polyhedron-entrapped
metal–organic
framework
(MOF)-assisted
CoTe2/MnTe2
heterostructure
one-dimensional
nanorods
were
initially
synthesized
using
simple
hydrothermal
strategy
then
transformed
into
ZIF-67
followed
by
tellurization
which
was
used
bifunctional
electrocatalyst
evolution
reaction
(OER)
reduction
(ORR).
designed
MOF
nanorod
exhibited
superior
activity
OER
(η
=
220
mV@
10
mA
cm–2)
ORR
(E1/2
0.81
V
vs
RHE)
outstanding
stability.
exceptional
achievement
could
be
primarily
credited
structure,
interconnected
designs,
deliberately
created
deficiencies
enhanced
electrocatalytic
OER/ORR.
improvement
predominantly
due
surface
area
charge
transfer
inherent
materials.
Therefore,
this
cost-effective
method
produce
active
electrocatalysts.
Nano Letters,
Journal Year:
2023,
Volume and Issue:
23(11), P. 4699 - 4707
Published: March 23, 2023
Mass
transfer
is
critical
in
catalytic
processes,
especially
when
the
reactions
are
facilitated
by
nanostructured
catalysts.
Strong
efforts
have
been
devoted
to
improving
efficacy
and
quantity
of
active
sites,
but
often,
mass
has
not
well
studied.
Herein,
we
demonstrate
importance
electrocatalytic
oxygen
reduction
reaction
(ORR)
tailoring
pore
sizes.
Using
a
confined-etching
strategy,
fabricate
boron-
nitrogen-doped
carbon
(B,N@C)
electrocatalysts
featuring
abundant
sites
different
porous
structures.
The
ORR
performance
these
catalysts
found
correlate
with
diffusion
reactant.
optimized
B,N@C
trimodal-porous
structures
feature
enhanced
O2
better
activity
per
heteroatomic
site
toward
process.
This
work
demonstrates
significance
nanoarchitecture
engineering
sheds
light
on
how
optimize
transfer.
Journal of the American Chemical Society,
Journal Year:
2023,
Volume and Issue:
145(7), P. 4158 - 4165
Published: Feb. 8, 2023
Metal–organic
layers
(MOLs),
a
monolayered
version
of
metal–organic
frameworks
(MOFs),
have
recently
emerged
as
novel
two-dimensional
molecular
material
platform
to
design
multifunctional
catalysts.
MOLs
inherit
the
intrinsic
tunability
MOFs
and
yet
more
accessible
modifiable
building
blocks.
Here
we
report
engineering
six
via
modulated
solvothermal
synthesis
between
HfCl4
three
photosensitizing
ligands
followed
by
postsynthetic
modification
with
two
carboxylate-containing
cobaloximes
for
tandem
synergistic
photocatalysis.
Morphological
structural
characterization
transmission
electron
microscopy
atomic
force
compositional
analysis
inductively
coupled
plasma-mass
spectrometry
nuclear
magnetic
resonance
spectroscopy
establish
flat
nanoplates
periodic
lattice
structure
hexagonal
symmetry.
The
efficiently
catalyze
dehydrogenative
coupling
reactions
Heck-type
reactions.
most
active
MOL
catalyst
was
used
gram-scale
vesnarinone,
cardiotonic
agent,
in
80%
yield
turnover
number
400
eight
consecutive
reaction
cycles
without
significant
loss
activities.
