Analytical Chemistry,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 17, 2024
A
ratiometric
fluorescence-photothermal
dual-mode
assay
method
is
constructed
for
the
detection
of
butyrylcholinesterase
(BChE)
activity
based
on
time-resolved
levodopa
(L-DOPA)
cascade
polymerization.
First,
a
newly
designed
bimetallic
metal–organic
framework
(MOF),
Eu/Co-DPA
(DPA:
pyridine-2,6-dicarboxylic
acid),
screened
out
as
fluorescent
nanozyme
with
high
catalytic
and
superior
luminescence
properties.
In
presence
boric
acid
(BA),
L-DOPA
forms
BA-esterified
L-DOPA,
which
catalyzed
by
to
form
oligomers
strong
blue
fluorescence.
Meanwhile,
red
fluorescence
quenched
oligomers,
generating
sensitive
turn-on/off
response.
As
polymerization
time
increases,
cleaves
borate
ester
bonds
expose
catechol
structures
facilitates
further
oxidation
promoting
formation
poly(L-DOPA)
nanoparticles
photothermal
conversion
efficiency
(30.33%).
Then,
using
thiocholine
(butyrylthiocholine
enzymolysis
product)
inhibit
Eu/Co-DPA,
BChE
detected
through
change
in
dual
signals.
Both
modes
have
low
limits
(0.021
0.024
U
L–1)
accuracy
(93.3–105.3%
recovery).
The
results
real
human
serum
indicate
that
both
show
100.0%
agreement
standard
method.
To
our
knowledge,
this
work
first
combines
MOFs
BA
regulator
tune
structure
polymers,
providing
pathbreaking
paradigm
preparing
catecholamine-based
organic
polymers.
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 25, 2025
Abstract
Carbon‐free
dual‐atom
catalysts
(CFDACs)
are
beginning
to
make
their
presence
in
the
field
of
electrocatalysis
due
unique
properties
and
structures
that
different
from
those
carbon‐based
DACs,
which
endowed
with
activity,
selectivity,
stability.
Currently,
some
advances
made
study
CFDACs,
including
structure‐performance
relationships
metal‐support
interaction,
theoretical
combined
experiments,
electrocatalytic
applications
potential
catalytic
mechanisms,
design
strategies
achieve
highly
active
performance.
Herein,
perception
CFDACs
is
first
elaborated
terms
carbon‐free
substrates
sites,
then
briefly
summarizes
advanced
characterization
techniques,
study,
energy
storage
conversion
applications,
highlights
realize
high‐performance
vacancy
anchoring,
strain
regulation,
alloying,
finally
put
forward
personal
viewpoints
on
current
challenges
future
development
CFDACs.
Bulletin of the Chemical Society of Japan,
Год журнала:
2025,
Номер
98(5)
Опубликована: Апрель 30, 2025
Abstract
Electrochemical
chlorine
evolution
reaction
(CER)
is
a
crucial
practical
application
of
electrochemical
processes,
particularly
in
the
field
disinfection.
Acidic
electrolytic
oxidized
water
(AEOW),
an
effective
disinfectant,
produced
by
electrolyzing
very
dilute
solution
within
ion-exchange
membrane
electrolyzer.
During
this
process,
hypochlorous
acid
formed
at
anode
through
CER,
showcasing
significant
sterilization
activity.
Due
to
minimal
presence
chloride
ions,
enhancing
selectivity
electrode
for
CER
essential
boost
effectiveness
electrolysis.
In
addition,
oxygen
(OER)
that
occurs
region
impedes
material's
ability
CER.
work,
we
successfully
synthesized
nickel-based
metal
framework
composite
graphite
flake
electrode.
This
demonstrates
remarkable
and
activity
context
displaying
overpotential
158.3
mV
when
current
density
10
mA
cm−2,
voltage
difference
recorded
between
OER
(ΔECER-OER)
was
found
be
488
mV.
The
optimal
preparation
conditions
AEOW
were
explored
produce
carry
out
experiments.
experiments
showed
available
content
70
mg/L,
rate
63.9%
1
min,
90%
5
99.9%
15
min.
Inorganic Chemistry,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 19, 2025
Perovskite
oxides
continue
demonstrating
suboptimal
electrocatalytic
performance
for
the
oxygen
evolution
reaction
(OER)
and
hydrogen
(HER)
due
to
their
inherently
low
activity,
inadequate
electronic
conductivity,
restricted
availability
of
active
sites.
Defect
engineering
has
attracted
significant
attention
as
a
promising
approach
enhancing
kinetics.
In
this
study,
LaCo0.67Cu0.33O3
(LCCO)
composite
perovskite
electrocatalyst
was
synthesized
using
sol-gel
method
followed
by
acid
etching
defect
(LCCO-x,
where
x
=
6,
12,
24,
30,
indicating
treatment
time
in
hours).
Particularly,
LCCO-24
exhibited
high
activity
improved
kinetics
both
OER
HER
under
alkaline
conditions.
When
employed
overall
water
splitting,
it
achieved
full-cell
voltage
1.49
V
at
current
density
10
mA·cm-2,
comparable
leading
noble
metal
catalysts.
Analysis
confirmed
that
enhancement
bifunctional
attributed
increased
presence
defects
increase
surface
area.
This
study
demonstrates
is
an
effective
investigating
context
electrochemical
splitting.
