Advanced Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 25, 2025
Abstract
To
overcome
the
challenges
of
low
catalytic
activity
and
instability,
a
molecular
weight
engineering
strategy
coupled
with
oxidative
ammonolysis
is
developed
to
synthesize
CoRu‐based
alloy
catalysts
distinct
morphologies
properties
from
biorefinery
lignin.
This
approach
effectively
modulates
intrinsic
active
sites
exposes
unsaturated
nitrogen‐oxygen
structures,
thereby
tailoring
morphology
defect
structure
carbon
layers
in
catalysts.
The
as‐synthesized
CoRu
lignin
precursors
varying
weights
are
designated
as
CoRu@OALC‐EtOAC,
CoRu@OALC‐EtOH,
CoRu@OALC‐Residual.
featuring
defect‐rich
graphitic
carbon‐coated
structure,
exhibited
exceptional
overall
water‐splitting
performance
(1.48
V
at
10
mA
cm
−2
),
significantly
surpassing
Pt/C
||
Ru/C
(1.58
).
In
contrast,
CoRu@OALC‐Residual,
its
amorphous
demonstrated
remarkable
stability
(350
h
100
vastly
outperforming
(6
In‐situ
Raman
spectroscopy
DFT
calculations
revealed
that
adsorb
*
H
intermediates,
accelerating
process.
strong
adsorption
also
induces
layer
rearrangement,
leading
dissolution
oxidation
metal
particles.
provides
universal
method
for
biomass‐derived
catalysts,
establishing
direct
relationship
between
weight,
catalyst
morphology,
electrocatalytic
performance.
Journal of Materials Chemistry A,
Год журнала:
2024,
Номер
12(41), С. 28023 - 28031
Опубликована: Янв. 1, 2024
Dual-doped
ruthenium-based
nanocrystals
were
developed
as
efficient
and
stable
electrocatalysts
for
acidic
overall
seawater
splitting
with
superior
activity
durability.
Developing
low-cost
and
highly
efficient
bifunctional
catalysts
for
both
the
oxygen
evolution
reaction
(OER)
hydrogen
(HER)
is
a
challenging
problem
in
electrochemical
overall
water
splitting.
Here,
iron,
tungsten
dual-doped
nickel
sulfide
catalyst
(Fe/W-Ni
Inorganic Chemistry,
Год журнала:
2025,
Номер
64(1), С. 361 - 370
Опубликована: Янв. 2, 2025
Clean
energy
conversion
and
storage
require
simple,
economical,
effective
electrode
materials
to
achieve
promising
results.
The
development
of
high-performance
electrocatalysts
with
adequate
stability
cost-effectiveness
is
essential
ensure
low
overpotentials
toward
the
oxygen
evolution
reaction
(OER).
Herein,
a
cobalt-based
metal-organic
framework
4,4,4-6T14
topology
in
combination
various
ratios
NiMn-layered
double
hydroxide
(Co-MOF@X%NiMn-LDH,
X
=
5,
10,
20,
40%)
applied
as
an
electrocatalyst
for
oxidation
water.
optimum
sample,
Co-MOF@20%NiMn-LDH
nanocomposite,
showed
overpotential
174
mV
at
current
density
10
mA
cm-2
reduced
Tafel
slope
64
dec-1
1
M
KOH,
which
makes
it
excellent
candidate,
significantly
superior
commercial
IrO2
most
MOF-
LDH-based
electrocatalysts.
Chronopotentiometry
tests
OER
over
several
hours
confirmed
that
these
have
been
sufficiently
stable.
Pillared
MOFs
can
obstruct
active
entities
from
NiMn-LDH
cubic
agglomeration,
thus
facilitating
mass
transportation
ensuring
continuous
exposure
sites.
Accordingly,
synthesized
composite
demonstrates
considerable
electrocatalytic
efficiency
OER,
consequence
porous
structure,
external
surface
area,
synergistic
effects
among
Co-MOF
samples.
Advanced Science,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 7, 2025
Abstract
Overall
water
splitting
(OWS)
to
produce
hydrogen
has
attracted
large
attention
in
recent
years
due
its
ecological‐friendliness
and
sustainability.
However,
the
efficiency
of
OWS
been
forced
by
sluggish
kinetics
four‐electron
oxygen
evolution
reaction
(OER).
The
replacement
OER
alternative
electrooxidation
small
molecules
with
more
thermodynamically
favorable
potentials
may
fundamentally
break
limitation
achieve
production
low
energy
consumption,
which
also
be
accompanied
value‐added
chemicals
than
or
electrochemical
degradation
pollutants.
This
review
critically
assesses
latest
discoveries
coupled
various
OWS,
including
alcohols,
aldehydes,
amides,
urea,
hydrazine,
etc.
Emphasis
is
placed
on
corresponding
electrocatalyst
design
related
mechanisms
(e.g.,
dual
hydrogenation
N–N
bond
breaking
hydrazine
C═N
regulation
urea
inhibit
hazardous
NCO
−
NO
productions,
etc.),
along
emerging
reactions
(electrooxidation
tetrazoles,
furazans,
iodide,
quinolines,
ascorbic
acid,
sterol,
trimethylamine,
etc.).
Some
new
decoupled
electrolysis
self‐powered
systems
are
discussed
detail.
Finally,
potential
challenges
prospects
highlighted
aid
future
research
directions.
Advanced Sustainable Systems,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 22, 2025
Abstract
There
is
an
imperative
need
for
highly
efficient
electrocatalysts
cost‐effective
hydrogen
production.
Herein,
a
self‐supported,
hybrid
composite
as
bifunctional
electrocatalyst
introduced.
This
achieved
by
in
situ
growth
of
MoS
2
‐Ni
3
S
on
nickel
foam
(NF),
designated
/NF,
synthesized
facile
one‐step
hydrothermal
synthesis
method.
/NF
exhibits
low
overpotentials
only
187
and
146
mV
OER
HER,
respectively,
to
achieve
current
density
10
mA
cm
−2
1
M
KOH.
The
practical
application
the
designed
verified
constructing
||
symmetrical
membrane
electrode
assembly
(MEA)
4
working
area
anion
exchange
water
electrolyzer.
system
shows
continuous
electrolysis
monitored
48
h
duration.
For
OER,
optimum
d‐band
center
−1.66
eV
heterostructure
calculated
from
Density
Functional
Theory
(DFT)
studies.
factors
like
unique
structure
electrocatalyst,
enhanced
hydrophilicity,
improved
electrochemically
accessible
number
sites
(ECASs),
center,
are
expected
be
primary
contributors
system's
performance.
Thus,
present
finding
unveils
straightforward
approach
creating
stable
advancing
commercial
realm
renewable
electrochemical
energy
conversion.
