RSC Advances,
Journal Year:
2023,
Volume and Issue:
13(6), P. 3843 - 3876
Published: Jan. 1, 2023
Electrochemical
splitting
of
water
is
an
appealing
solution
for
energy
storage
and
conversion
to
overcome
the
reliance
on
depleting
fossil
fuel
reserves
prevent
severe
deterioration
global
climate.
Though
there
are
several
cells,
hydrogen
(H
ACS Nano,
Journal Year:
2023,
Volume and Issue:
17(13), P. 12510 - 12518
Published: June 23, 2023
Metal-organic
frameworks
(MOFs)
manifest
enormous
potential
in
promoting
electromagnetic
wave
(EMW)
absorption
thanks
to
the
tailored
components,
topological
structure,
and
high
porosity.
Herein,
rodlike
conductive
MOFs
(cMOFs)
composed
of
adjustable
metal
ions
Zn,
Cu,
Co,
or
Ni
ligands
hexahydroxytriphenylene
(HHTP)
are
prepared
attain
tunable
dielectric
properties
for
a
EMW
absorption.
Specifically,
influences
cMOFs'
composition,
charge
transport
characteristic,
crystalline
anisotropy
microstructure
on
performance
ascertained,
advancing
understanding
attenuation
mechanisms
MOFs.
The
boosted
polarization
losses
derived
from
conjugation
effects
terminal
groups,
as
well
shape
anisotropy,
lead
prominent
cMOFs.
Cu-HHTP
confers
minimum
reflection
loss
(RLmin)
-63.55
dB
at
thickness
2.9
mm
maximum
effective
bandwidth
5.2
GHz.
Moreover,
Zn-HHTP
showcases
superiority
S-band
(2-4
GHz)
with
an
RLmin
-62.8
1.9
mm.
This
work
not
only
hoists
mechanistic
structure-function
relationships
cMOFs
but
also
offers
guidelines
preparing
functional
MOF
materials.
Advanced Functional Materials,
Journal Year:
2023,
Volume and Issue:
33(41)
Published: July 28, 2023
Abstract
Constructing
an
efficient
alkaline
hydrogen
evolution
reaction
(HER)
catalyst
with
low
platinum
(Pt)
consumption
is
crucial
for
the
cost
reduction
of
energy
devices,
such
as
electrolyzers.
Herein,
nanoflower‐like
carbon‐encapsulated
CoNiPt
alloy
catalysts
composition
segregation
are
designed
by
pyrolyzing
morphology‐controlled
and
Pt‐proportion‐tuned
metal–organic
frameworks
(MOFs).
The
optimized
containing
15%
NFs
(15%:
Pt
mass
percentage,
NFs:
nanoflowers)
exhibits
outstanding
HER
performance
a
overpotential
25
mV
at
current
density
10
mA
cm
−2
,
far
outperforming
those
commercial
Pt/C
(47
mV)
most
advanced
catalysts.
Such
superior
activity
originates
from
integration
Co‐O
hybridization.
hierarchical
structure
guarantees
full
exposure
sites.
Density
functional
theory
calculations
suggest
that
components
not
only
promote
water
dissociation
but
also
facilitate
adsorption
process,
synergistically
accelerating
kinetics
HER.
In
addition,
volcanically
distributed
surface
oxygen
content,
mainly
in
form
Co
3d
O
2p
hybridization,
which
another
reason
enhanced
activity.
This
work
provides
feasible
insights
into
design
cost‐effective
coordinating
kinetic
sites
adjusting
appropriate
content.
Nano-Micro Letters,
Journal Year:
2022,
Volume and Issue:
15(1)
Published: Dec. 1, 2022
The
sustainable
production
of
green
hydrogen
via
water
electrolysis
necessitates
cost-effective
electrocatalysts.
By
following
the
circular
economy
principle,
utilization
waste-derived
catalysts
significantly
promotes
development
energy.
Currently,
diverse
have
exhibited
excellent
catalytic
performance
toward
evolution
reaction
(HER),
oxygen
(OER),
and
overall
(OWE).
Herein,
we
systematically
examine
recent
achievements
in
electrocatalysts
for
electrolysis.
general
principles
design
efficient
are
discussed,
followed
by
illustration
current
strategies
transforming
wastes
into
Then,
applications
(i.e.,
carbon-based
catalysts,
transitional
metal-based
heterostructure
catalysts)
HER,
OER,
OWE
reviewed
successively.
An
emphasis
is
put
on
correlating
catalysts'
structure-performance
relationship.
Also,
challenges
research
directions
this
booming
field
finally
highlighted.
This
review
would
provide
useful
insights
design,
synthesis,
electrocatalysts,
thus
accelerate
economy-driven
energy
scheme.
Nano-Micro Letters,
Journal Year:
2023,
Volume and Issue:
15(1)
Published: April 30, 2023
Abstract
Electrochemically
reducing
CO
2
to
more
reduced
chemical
species
is
a
promising
way
that
not
only
enables
the
conversion
of
intermittent
energy
resources
stable
fuels,
but
also
helps
build
closed-loop
anthropogenic
carbon
cycle.
Among
various
electrocatalysts
for
electrochemical
reduction,
multifunctional
metal–organic
frameworks
(MOFs)
have
been
employed
as
highly
efficient
and
selective
heterogeneous
due
their
ultrahigh
porosity
topologically
diverse
structures.
Up
now,
great
progress
has
achieved
in
design
synthesis
active
MOF-related
catalysts
reduction
reaction
(CO
RR),
corresponding
mechanisms
thoroughly
studied.
In
this
review,
we
summarize
recent
applying
MOFs
derivatives
RR,
with
focus
on
strategies
electrolyzers.
We
first
discussed
different
RR
products
introduced
commonly
applied
electrolyzer
configurations
current
system.
Then,
an
overview
several
categories
(CO,
HCOOH,
CH
4
,
3
OH,
multi-carbon
chemicals)
generated
from
or
via
was
discussed.
Finally,
offer
some
insights
perspectives
future
development
reduction.
aim
provide
new
into
field
further
guide
research
large-scale
applications.
Small,
Journal Year:
2023,
Volume and Issue:
20(3)
Published: Sept. 10, 2023
Abstract
The
development
of
efficient
and
low‐cost
catalysts
for
cathodic
oxygen
reduction
reaction
(ORR)
in
Zn‐air
battery
(ZAB)
is
a
key
factor
reducing
costs
achieving
industrialization.
Here,
novel
segregated
CoNiPt
alloy
embedded
N‐doped
porous
carbon
with
nanoflowers
(NFs)‐like
hierarchy
structure
synthesized
through
pyrolyzing
Hofmann‐type
metal‐organic
frameworks
(MOFs).
unique
hierarchical
NFs
exposes
more
active
sites
facilitates
the
transportation
intermediates,
thus
accelerating
kinetics.
Impressively,
resulting
15%
CoNiPt@C
catalyst
exhibits
outstanding
alkaline
ORR
activity
half‐wave
potential
0.93
V,
its
mass
7.5
times
higher
than
that
commercial
Pt/C
catalyst,
surpassing
state‐of‐the‐art
noble
metal‐based
catalysts.
Furthermore,
assembled
CoNiPt@C+RuO2
ZAB
demonstrates
maximum
power
density
172
mW
cm
−2
,
which
superior
to
Pt/C+RuO2
ZAB.
Experimental
results
reveal
intrinsic
attributed
synergistic
interaction
between
defects
pyrrolic/graphitic
N
species,
optimizes
adsorption
energy
intermediate
species
process
greatly
enhances
catalytic
activity.
This
work
provides
practical
feasible
strategy
synthesizing
cost‐effective
by
optimizing
electronic
MOF‐derived
Small,
Journal Year:
2023,
Volume and Issue:
19(19)
Published: Feb. 8, 2023
Early
transition
metals
based
2D
carbides,
nitrides
and
carbonitrides
nanomaterials
are
known
as
MXenes,
a
novel
extensive
new
class
of
materials
family.
Since
the
first
accidently
synthesis
discovery
Ti3
C2
in
2011,
more
than
50
additional
compositions
have
been
experimentally
reported,
including
at
least
eight
distinct
methods
also
100
stoichiometries
theoretically
studied.
Due
to
its
distinctive
surface
chemistry,
graphene
like
shape,
metallic
conductivity,
high
hydrophilicity,
outstanding
mechanical
thermal
properties,
redox
capacity
affordable
with
mass-produced
nature,
this
diverse
MXenes
tremendous
scientific
technological
significance.
In
review,
we'll
come
across
MXene
possible
methods,
their
advantages,
limitations
future
suggestions,
chemistry
related
selected
properties
potential
sensing
applications,
which
will
help
us
explain
why
family
is
growing
very
fast
compared
other
families.
Secondly,
problems
that
further
improve
commercialization
sensors
examined,
many
advances
commercializing
proposed.
At
end,
go
through
current
challenges,
suggestions.
