Sensors,
Год журнала:
2023,
Номер
23(15), С. 6957 - 6957
Опубликована: Авг. 5, 2023
Herein,
a
three-dimensional
flower-like
cobalt-nickel
bimetallic
metal-organic
framework
(CoNi-MOF)
coupled
with
two-dimensional
graphene
oxide
(GO)
nanocomposites
was
successfully
synthesized
for
the
selective
and
simultaneous
electrochemical
determination
of
catechol
(CC)
hydroquinone
(HQ).
The
structure
CoNi-MOF/GO
nanocomposite
has
multilayer
large
surface
area,
which
greatly
improves
its
electrocatalytic
activity
towards
CC
HQ.
Differential
pulse
voltammetry
(DPV)
results
showed
that
peak-to-peak
separation
(0.223
V)
HQ
(0.120
103
mV
at
modified
glassy
carbon
electrode
(CoNi-MOF/GO/GCE),
suggesting
proposed
can
selectively
simultaneously
determine
them.
Under
optimal
conditions,
CoNi-MOF/GO/GCE
an
excellent
analytical
performance
HQ,
including
wide
linear
range
(0.1-100
μM),
low
detection
limit
(0.04
μM
0.03
CC)
high
anti-interference
ability.
As
expected,
developed
been
used
to
analyze
in
river
water,
acceptable
results.
Angewandte Chemie International Edition,
Год журнала:
2022,
Номер
62(9)
Опубликована: Дек. 5, 2022
Abstract
Transition
metal
complexes
are
well‐known
homogeneous
electrocatalysts.
In
this
regard,
metal–organic
frameworks
(MOFs)
can
be
considered
as
an
ensemble
of
transition
ordered
in
a
periodic
arrangement.
addition,
MOFs
have
several
additional
positive
structural
features
that
make
them
suitable
for
electrocatalysis,
including
large
surface
area,
high
porosity,
and
content
accessible
with
exchangeable
coordination
positions.
The
present
review
describes
the
current
state
use
electrocatalysts,
both
host
electroactive
guests
their
direct
electrocatalytic
activity,
particularly
case
bimetallic
MOFs.
field
MOF‐derived
materials
is
purposely
not
covered,
focusing
on
or
its
composites
Special
attention
has
been
paid
to
strategies
overcome
poor
electrical
conductivity
limited
stability.
Advanced Energy Materials,
Год журнала:
2022,
Номер
12(48)
Опубликована: Ноя. 6, 2022
Abstract
The
development
of
highly
efficient
and
robust
bifunctional
electrocatalysts
for
oxygen
reduction
(ORR)
evolution
reactions
(OER)
is
the
key
issue
realizing
high‐performance
long‐life
rechargeable
zinc–air
batteries
(ZABs).
However,
it
still
a
great
challenge
to
integrate
independent
ORR
OER
sites
in
catalyst
with
high
activity.
Here,
carbon
nanotube‐bridging
strategy
proposed
synthesize
such
electrocatalyst
enriched
active
single‐atom
Fe
nanosized
NiCo
hydroxides
OER.
Consequently,
developed
shows
small
overpotential
difference
0.686
V.
When
used
as
an
electrode
catalyst,
corresponding
ZAB
exhibits
large
power
density
219.5
mW
cm
−2
,
charge–discharge
voltage
gap
0.72
V
at
10
mA
outstanding
discharge–charge
durability
without
attenuation
after
more
than
700
cycles.
This
work
proposes
new
idea
realize
multifunctional
catalysts
drives
practical
application
ZABs.
Advanced Functional Materials,
Год журнала:
2023,
Номер
34(43)
Опубликована: Июнь 8, 2023
Abstract
The
effects
of
electromagnetic
(EM)
radiation
have
received
increased
attention,
closely
associated
with
the
widespread
use
electronics
and
wireless
communication.
A
significant
development
in
area
is
recent
adoption
metal‐organic
frameworks
(MOFs)
to
effectively
enable
interference
(EMI)
shielding.
MOF
tunable
molecular
scaffold
architecture
offers
numerous
pathways
generate
customizable
magnetic
electrical
properties,
which
are
prerequisite
materials
characteristics
for
efficient
EMI
shielding
performance.
Their
flexibility
terms
structural
design,
accompanied
by
high
porosity
large
specific
surface
area,
makes
MOFs
excellent
candidates
shield
EM
waves
at
multiple
scales.
Herein,
crucial
role
molecular‐,
nano‐,
micro‐,
macro‐scale
design
reviewed
accordance
performance
MOFs.
current
strategies
MOF‐based
shields
systematically
outlined,
mechanisms
also
expounded
based
on
their
features.
factors
that
hinder
utilization
functional
MOF‐derived
examined.
Future
research
directions
unveiled
rational
next‐generation
address
pressing
concerns.
Inorganic Chemistry,
Год журнала:
2024,
Номер
63(34), С. 15813 - 15820
Опубликована: Авг. 14, 2024
The
urea
oxidation
reaction
(UOR)
is
an
alternative
anodic
for
hydrogen
generation
via
water
splitting.
significance
of
UOR
lies
in
both
H2
production
and
the
decontamination
urea-containing
wastewater.
Commercial
electrocatalysts
this
field
are
generally
based
on
noble
metals
show
several
limitations.
Bimetal–organic
frameworks
(BMOFs)
can
be
excellent
candidates
replacement
noble-metal-based
catalysts
beacuse
their
promising
features,
such
as
a
tunable
structure,
high
surface
area,
abundant
sites
electrocatalysis.
In
study,
series
nickel–cobalt
BMOFs
(Nix-Coy-BMOFs:
x
y
refer
to
molar
fraction
Ni
Co)
were
synthesized
applied
UOR.
particular,
Ni0.15Co0.85-MOF
material
with
structure
similar
that
its
parent
Co-MOF,
revealed
exceptional
electrocatalytic
performance,
evidenced
by
low
values
overpotential
(1.33
V
vs
RHE
at
10
mA
cm–2),
TOF
(0.47
s–1),
Tafel
slope
(125
mV
dec–1).
At
40
cm–2
current
density,
also
showed
stability
during
72
h
tests.
This
performance
NiCo-BMOF
assigned
synergistic
effect
between
Co
Ni,
active
sites,
porosity,
all
which
result
increased
rate
due
acceleration
charge
mass
transfers.
Thus,
present
work
introduces
efficient
noble-metal-free
energy
from
urea-based
ACS Sustainable Chemistry & Engineering,
Год журнала:
2023,
Номер
11(6), С. 2160 - 2171
Опубликована: Янв. 30, 2023
Heavy
metal
ion
(HMI)
pollution
is
a
serious
threat
to
human
health
and
the
ecosystem.
Therefore,
there
an
urgent
need
develop
fast
sensitive
platform
for
heavy
detection.
In
this
work,
novel
sensing
based
on
ZIF-67-derived
cobalt/nitrogen-doped
carbon
(NC)
composite
polyhedrons
linked
with
multiwalled
nanotubes
(MWCNTs),
termed
Co@NC/MWCNT,
simultaneous
monitoring
of
Cd2+
Pb2+
was
established.
detail,
nanoporous
ZIF-67
first
in
situ
grown
MWCNTs,
followed
by
carbonization,
endowing
good
electrical
conductivity
large
specific
surface
area,
providing
more
active
sites
subsequent
attachment.
Under
optimal
parameters,
proposed
exhibited
relatively
wider
linear
range
0.12–2.5
μM,
lower
limits
detection
(LODs)
4.5
nM
(Cd2+)
4.9
(Pb2+).
Notably,
it
worth
mentioning
that
linearity
as-prepared
actual
water
sample
highly
consistent
buffer
solution,
showing
outstanding
anti-interference
performance.
Finally,
designed
performed
well
several
kinds
natural
environment
when
compared
standard
method,
demonstrating
huge
potential
trace
HMI
monitoring.
