Amorphous
electrocatalysts
exhibit
potentials
as
precursors
for
triggering
the
in
situ
reconstruction
to
generate
real
catalytic
active
species
toward
electrochemical
processes.
In
this
work,
a
new
kind
of
amorphous
Ni-Co-B
alloy
pre-catalysts
hydrogen
evolution
reaction
(HER)
is
reported,
which
obtained
via
facile
electroless
plating
strategy
on
nickel
foam
(NF).
Interestingly,
X-ray
photoelectron
spectroscopy,
absorption
spectroscopy
and
morphological
characterizations
identify
process
during
HER
accompanied
by
preferential
leaching
surface
B
formation
CoO
Advanced Energy Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 18, 2025
Abstract
The
seawater
splitting
for
green
hydrogen
production
is
emerging
as
a
key
research
focus
sustainable
energy.
Nevertheless,
the
inherent
complexity
of
seawater,
with
its
diverse
ion
composition
–
especially
chloride
ions,
calcium
and
magnesium
ions
poses
significant
challenges
in
catalyst
design.
Designing
highly
active
electrocatalysts
that
can
resist
corrosion
during
still
challenge.
This
article
presents
an
overview
fundamental
mechanisms
explores
issues
encountered
at
both
cathode
anode
electrode.
then
shifts
to
chlorine
anode,
examining
recent
advances
preventing
strategies.
Notably,
these
design
strategies,
such
anionic
passivation
layers,
corrosion‐resistant
metal
doping,
physical
barrier
situ
phase
transition‐driven
desalination,
decoupled
splitting,
are
comprehensively
investigated,
all
which
aim
enhance
catalytic
stability
splitting.
review
concludes
outlook
on
practical
applications
producing
through
Developing
efficient
and
economical
electrocatalysts
for
hydrogen
generation
at
high
current
densities
is
crucial
advancing
energy
sustainability.
Herein,
a
self-supported
evolution
reaction
(HER)
electrocatalyst
rationally
designed
prepared
on
nickel
foam
through
simple
two-step
chemical
etching
method,
which
consists
of
Pt
quantum
dots
(PtQDs)
coupled
with
nickel-iron
layered
double
hydroxide
(NiFe
LDH)
nanosheets
(named
PtQDs@NiFe
LDH).
The
characterization
results
indicate
that
the
introduction
PtQDs
induces
more
oxygen
vacancies,
thereby
optimizing
electronic
structure
LDH.
This
modification
enhances
conductivity
accelerates
adsorption/desorption
kinetics
intermediates
in
LDH,
ultimately
resulting
exceptional
catalytic
performance
HER
large
densities.
Specifically,
LDH
delivers
500
2000
mA·cm-2
remarkably
low
overpotentials
92
252
mV,
respectively,
markedly
outperforming
commercial
Pt/C
(η500
=
190
η2000
436
mV).
Moreover,
when
employing
NiFe
precursor
catalyst
as
anode
cathode,
an
overall
water
electrolysis
system,
only
1.66
V
2.02
are
required
to
achieve
mA·cm-2,
while
maintaining
robust
stability
200
h.
study
introduces
feasible
approach
developing
industrial-scale
Advanced Energy Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 4, 2024
Abstract
Heterostructured
interfaces
are
crucial
to
electrocatalysts
for
water
splitting.
Herein,
coral‐like
multiheterostructured
Ni
x
B/Mo
0.8
B
3
(NMB)
nanorods
encapsulated
by
a
boron‐rich
amorphous
layer
prepared
Density‐functional
theory
(DFT)
calculations
indicate
that
the
NMB
interface
adjusts
d
‐band
center
and
electronic
structure
of
molybdenum
sites.
Owing
strong
coupling
between
Ni,
Mo,
at
heterojunction,
large
number
exposed
catalytic
active
sites,
as
well
special
hydrophilic
characteristics
endowed
surrounding
layer,
catalyst
exhibits
remarkable
universal‐pH
hydrogen
evolution
reaction
(HER)
activity
with
low
overpotentials
(
η
)
15,
26,
83
mV
deliver
10
mA
cm
−2
in
basic,
acid,
neutral
media,
respectively,
outstanding
oxygen
(OER)
basic
medium
500
170
420
mV,
respectively.
The
unique
self‐supporting
3D
hierarchical
interconnected
facilitates
mass
transport
thus
leading
high
mechanical
stability
450
200
h
HER
OER
≈1000
.
More
importantly,
excellent
performance
toward
overall‐water
electrolysis
bifunctional
ultralow
cell
voltages
1.45/1.56/1.85
V
@
10/100/1000
,
demonstrating
potential
industrial
splitting
applications.
Inorganic Chemistry,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 13, 2025
Electrochemical
water
splitting
is
a
promising
method
for
the
generation
of
"green
hydrogen",
renewable
and
sustainable
energy
source.
However,
complex,
multistep
synthesis
processes,
often
involving
hazardous
or
expensive
chemicals,
limit
its
broader
adoption.
Herein,
nitrate
(NO3-)
anion-intercalated
nickel-iron-cerium
mixed-metal
(oxy)hydroxide
heterostructure
electrocatalyst
fabricated
on
nickel
foam
(NiFeCeOxHy@NF)
via
simple
electrodeposition
followed
by
cyclic
voltammetry
activation
to
enhance
surface
properties.
The
NiFeCeOxHy@NF
exhibited
low
overpotential
72
186
mV
at
10
mA
cm-2
hydrogen
evolution
reaction
(HER)
oxygen
(OER),
respectively,
in
1.0
M
KOH.
In
two-electrode
system,
obtained
voltage
1.47
V
KOH
with
robust
stability.
Results
revealed
that
notable
activity
catalyst
primarily
due
(i)
hierarchical
nanosheet
morphology,
which
provides
large
area
abundant
active
sites;
(ii)
NO3-
anion
intercalation
enhances
electrode
stability
eliminates
need
binders
while
simultaneously
promoting
strong
catalyst-substrate
adhesion,
resulting
decreased
resistance
accelerated
kinetics;
(iii)
unique
superhydrophilic
properties
facilitate
electrolyte
penetration
through
capillary
action
minimize
gas
bubble
formation
reducing
interfacial
tension.
