ACS Applied Nano Materials,
Journal Year:
2023,
Volume and Issue:
6(11), P. 9816 - 9824
Published: June 1, 2023
The
progress
of
highly
efficient
and
stable
nonprecious
metallic-based
electrocatalysts
for
the
hydrogen
evolution
reaction
(HER)
in
saline
water/seawater
is
great
importance
mass-scale
production
energy.
Herein,
a
nanostructured
NiFe-LDH/Cu2S
heterostructure
constructed
by
growing
NiFe-LDH
nanosheets
onto
Cu2S
nanorods.
This
possesses
exceptional
HER
performances
with
η10
=
36
mV
(η10
indicates
overpotential
at
current
density
10
mA
cm2)
worked
stably
over
100
h
alkaline
water.
Moreover,
heterojunction
catalyst
acts
as
bifunctional
electrocatalyst
anode
cathode,
achieving
cell
voltage
1.463
V,
which
superior
to
many
reported
electrocatalysts.
improvement
catalytic
performance
can
be
ascribed
charge
redistribution
on
heterointerface
that
accelerates
dissociation
process
caused
formation
Ni
low
electron
cloud
density.
obtained
covalent
S–O
bonds
are
beneficial
adsorption
H*.
In
addition,
also
exhibits
considerable
seawater
electrolytes,
delivering
1.483
V
stability
27
h.
We
present
promising
water
electrolysis
may
find
wide
applications
area
Journal of Materials Chemistry A,
Journal Year:
2024,
Volume and Issue:
12(30), P. 18832 - 18865
Published: Jan. 1, 2024
This
review
focuses
mainly
on
the
overall
facilitating
effect
of
heterostructures
OER
process.
The
fabrication
heterostructured
electrocatalysts
and
relationship
between
their
structures
electrocatalytic
properties
are
discussed.
Angewandte Chemie International Edition,
Journal Year:
2023,
Volume and Issue:
62(51)
Published: Aug. 31, 2023
Abstract
Developing
efficient
and
affordable
electrocatalysts
for
the
sluggish
oxygen
evolution
reaction
(OER)
remains
a
significant
barrier
that
needs
to
be
overcome
practical
applications
of
hydrogen
production
via
water
electrolysis,
transforming
CO
2
value‐added
chemicals,
metal‐air
batteries.
Recently,
hydroxides
have
shown
promise
as
OER.
In
situ
or
operando
techniques
are
particularly
indispensable
monitoring
key
intermediates
together
with
understanding
process,
which
is
extremely
important
revealing
formation/OER
catalytic
mechanism
preparing
cost‐effective
However,
there
lack
comprehensive
discussion
on
current
status
challenges
studying
these
mechanisms
using
in
techniques,
hinders
our
ability
identify
address
obstacles
present
this
field.
This
review
offers
an
overview
outlining
their
capabilities,
advantages,
disadvantages.
Recent
findings
related
formation
OER
revealed
by
also
discussed
detail.
Additionally,
some
field
concluded
appropriate
solution
strategies
provided.
Small,
Journal Year:
2023,
Volume and Issue:
19(50)
Published: Aug. 25, 2023
Abstract
Active
and
stable
electrocatalysts
toward
oxygen
evolution
reaction
(OER)
are
essential
for
alkaline
water
splitting.
Herein,
an
efficient
durable
high‐valence
NiFe‐based
OER
electrocatalyst
is
developed,
featuring
a
protective
CeO
2−
x
coating
to
prevent
the
corrosion
of
carbon
substrates
during
oxidative
operation,
ensuring
excellent
catalyst
stability.
The
incorporation
also
leads
formation
Ce‐doped
NiFe
sulfide
catalyst.
Ce
modulator
enables
dynamic
transformation
into
highly
active
(oxy)hydroxide
species
with
Ni
sites
enhanced
Ni─O
covalency,
thereby
improving
its
catalytic
activity.
Accordingly,
prepared
NiFeS
2
/CeO
/CC
achieves
activity
overpotential
260
mV
at
100
mA
cm
−2
in
1.0
m
KOH.
Moreover,
current
density
187
hydrogen
reaction.
anion
exchange
membrane
electrolyzer
reached
500
1.73
V
cell
voltage
stability
h
continuous
operation.
This
study
demonstrates
promising
approach
fabrication
robust
water‐splitting
electrocatalysts.
Advanced Energy Materials,
Journal Year:
2024,
Volume and Issue:
14(38)
Published: July 11, 2024
Abstract
Electrocatalytic
oxidation
of
5‐hydroxymethylfurfural
(HMFOR)
is
an
effective
route
to
produce
value‐added
chemicals
with
low
energy
consumption.
In
this
work,
efficient
electrocatalysts
are
prepared
by
varying
the
amount
Ce
doping
and
CeO
2
modification
on
NiFe
layered
double
hydroxide
(NiFe–LDH)
nanosheets
supported
carbon
cloth
(CC).
Through
heterogeneous
interface
construction,
electronic
structure
coordination
chemistry
NiFe–LDH
greatly
changed.
Compared
synergistic
effect
Ce‐doping
modification,
CC@NiFeCe(3%)‐LDH
only
show
excellent
charge
transfer
ability,
higher
HMF
conversion
(95.73%),
2,5‐furandicarboxylic
acid
(FDCA)
selectivity
(93.31%),
Faraday
efficiency
(99.47%)
at
1.44
V
RHE
.
Density‐functional
theory
calculations
X‐ray
fine
spectroscopy
demonstrate
that
doping,
compared
their
effects,
significantly
facilitates
electron
transport
optimizes
intermediate
adsorption
effectively
lowering
activation
for
transformation
5‐formyl‐2‐furancarboxylic
(FFCA)
encourage
FFCA
FDCA.
Overall,
work
systemically
investigates
HMFOR
behaviors
CC@NiFe–LDH
under
synergetic
effect,
which
provides
some
guidance
development
high‐performance
performance.
Advanced Energy Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: June 4, 2024
Abstract
Electrochemical
biomass
oxidation
coupled
with
hydrogen
evolution
offers
a
promising
route
to
generate
value‐added
chemicals
and
clean
energy.
The
complex
adsorption
behavior
of
5‐hydroxymethyl
furfural
(HMF)
hydroxyl
ions
(OH
−
)
on
the
electrocatalyst
surface
during
HMF
electrooxidation
reaction
(HMFOR)
necessitates
an
in‐depth
understanding
active
sites
available
for
adsorption.
Herein,
oxygen
vacancy
(V
O
defects
are
introduced
in
NiFe
layered
double
hydroxide
(LDH)
using
Ce
dopants
manipulate
electronic
structure.
Synchrotron‐based
HE‐XRD
XAS
indicate
negligible
V
La‐doped
while
doping
leads
due
flexible
redox
(Ce
3+
↔
4+
).
‐rich
Ce‐NiFe
exhibits
higher
Faradic
efficiency
≈90%
produce
2,5‐furan
dicarboxylic
acid
(FDCA),
far
greater
than
≈60%
act
as
alternative
OH
adsorption,
hence
reducing
competition
same
metal
sites.
DFT
calculation
results
corroborate
experimental
findings
by
showcasing
that
presence
manipulates
energies
facilitates
chemical
improve
HMFOR.
In
situ
derived
pair
distribution
function
RMC
simulations
confirm
trapping
centers
evident
interlayer
distance
evolution.
Taken
together,
this
work
showcases
routes
dual‐site
design
improved
electrooxidation.
ACS Applied Energy Materials,
Journal Year:
2024,
Volume and Issue:
7(3), P. 1027 - 1036
Published: Jan. 12, 2024
Harnessing
the
potential
of
oxygen
vacancies
(Ov)
in
metal
oxides
presents
a
promising
avenue
for
expediting
reaction
kinetics
water
oxidation.
In
this
context,
layered
double
hydroxides
(LDH)
offer
versatile
platform
developing
cost-effective
electrocatalysts
with
exceptional
performance,
thanks
to
their
distinctive
lamellar
morphology.
study,
we
unveil
augmented
electrochemical
efficiency
CoFeLDH
by
deliberately
inducing
an
optimal
vacancy
under
ambient
conditions
evolution
(OER).
The
transformation
nanorods
(CoFeLDH)
into
Ov-rich
(CoFeLDH-Ov)
takes
place
through
chemical
reduction
process
at
room
temperature.
effect
Ov
within
catalyst
is
substantiated
qualitative
analyses,
such
as
X-ray
photoelectron
spectroscopy
(XPS),
photoluminescence
(PL),
and
electron
paramagnetic
resonance
(EPR).
resulting
catalyst,
CoFeLDH-Ov,
exhibits
overpotential
220
mV
current
density
30
mA/cm2
1
M
KOH
electrolyte,
indicating
enhanced
electroactivity
when
compared
(without
defects).
also
reveals
excellent
stability
more
than
500
h
higher
50
mA/cm2.
To
validate
catalyst's
conducive
nature,
functional
theory
(DFT)
calculations
are
performed,
revealing
iron
(Fe)
prominent
active
site
catalyst.
By
means
comprehensive
experimental
theoretical
substantial
influence
on
electronic
structure
LDH
system
demonstrated,
which,
turn,
facilitates
facile
charge
transfer
strengthens
