Catalysts,
Journal Year:
2023,
Volume and Issue:
13(7), P. 1064 - 1064
Published: July 1, 2023
Anion
modification
and
trace
metal
doping
have
been
widely
demonstrated
to
unique
advantages
in
regulating
both
electrocatalytic
activity
the
electronic
structure
of
non-precious
materials.
Developing
a
simple
practical
preparation
strategy
is
critical,
but
it
still
faces
challenges.
In
this
paper,
novel
type
dual-modification
approach
put
forward
rationally
design
S,
Pt-CoNi
material,
which
can
be
grown
directly
on
nickel
foam
(NF)
one-step
electrodeposition
process.
The
multiple
having
plenty
active
sites,
high
conductivity,
faster
charge
transfer
endow
optimized
reaction
kinetic
for
HER.
prepared
Pt-CoNi/NF
catalyst
displays
excellent
catalytic
performance,
low
overpotential
116
mV
at
50
mA
cm−2
small
Tafel
slope
75
dec−1
are
achieved.
coupled
Pt-CoNi/NF||FeOOH/NF
electrolyzer
delivers
current
density
100
potential
1.61
V
as
well
superior
stability
under
alkaline
conditions.
Our
work
experimentally
confirms
feasibility
constructing
dual-regulation
via
electrodeposition,
also
provides
ideas
controllable
other
high-performance
electrodes
electrocatalysis.
Small,
Journal Year:
2023,
Volume and Issue:
19(42)
Published: June 22, 2023
Exploiting
highly
active
and
bifunctional
catalysts
for
both
hydrogen
evolution
reaction
(HER)
hydrazine
oxidation
(HzOR)
is
a
prerequisite
the
acquisition.
High-entropy
materials
have
received
widespread
attention
in
catalysis,
but
high-performance
electrodes
are
still
lacking.
Herein,
novel
P-modified
amorphous
high-entropy
CoFeNiCrMn
compound
developed
on
nickel
foam
(NF)
by
one-step
electrodeposition
strategy.
The
achieved
CoFeNiCrMnP/NF
delivers
remarkable
HER
HzOR
performance,
where
overpotentials
as
low
51
268
mV
realized
at
100
mA
cm-2
.
improved
cell
voltage
of
91
further
demonstrated
assessing
constructed
hydrazine-assisted
water
electrolyser,
which
almost
1.54
V
lower
than
HER||OER
system.
Experimental
results
confirm
important
role
each
element
regulating
bifuncational
performance
catalysts.
main
influencing
elements
seem
to
be
Fe
Ni
HER,
while
P-modification
Cr
metal
may
contribute
lot
HzOR.
These
synergistic
advantages
help
energy
barriers
improve
kinetics,
resulting
excellent
activity
CoFeNiCrMnP/NF.
work
offers
feasible
strategy
develop
self-supporting
electrode
with
overall
splitting.
Materials Horizons,
Journal Year:
2023,
Volume and Issue:
10(11), P. 5277 - 5287
Published: Jan. 1, 2023
The
hydrazine
oxidation
reaction
(HzOR)
is
considered
as
a
promising
alternative
process
of
the
oxygen
evolution
(OER)
to
realize
more
energy-efficient
hydrogen
generation.
However,
lack
highly
active
bifunctional
catalysts
poses
huge
challenge
this
strategy.
In
work,
we
report
novel
and
universal
electrodeposition
strategy
rationally
synthesize
self-supporting
electrode.
utilization
ammonium
fluoride
helps
modulate
not
only
morphology
CoP,
but
also
synchronous
formation
an
anion-modified
structure,
leading
excellent
performance.
optimal
F-CoP/CF
exhibits
small
potentials
-90
mV
41
at
1
A
cm-2,
high
stability
low
Tafel
slopes
28
dec-1
3.26
for
HER
HzOR,
respectively.
efficient
stable
activity
can
be
further
confirmed
in
anion-exchange
membrane
hydrazine-assisted
water
electrolyzer
(0.49
V
cm-2).
Utilizing
density
functional
theory
calculations,
optimized
adsorption
energy
molecules
intermediates
well
rate-determining
step
HzOR
are
demonstrated
F-CoP.
Journal of Materials Chemistry A,
Journal Year:
2024,
Volume and Issue:
12(15), P. 9038 - 9054
Published: Jan. 1, 2024
A
porous
structure
was
electrosynthesized
via
a
DHBT
with
interconnected
nanosheets.
The
fabricated
electrode
demonstrated
great
activity
for
the
UOR
and
HER.
ACS Sustainable Chemistry & Engineering,
Journal Year:
2023,
Volume and Issue:
11(38), P. 14186 - 14196
Published: Sept. 12, 2023
Energy-saving
water
electrolysis
is
an
ideal
strategy
to
realize
the
grid-scale
generation
of
hydrogen
fuel,
especially
by
coupling
with
alternating
hydrazine
oxidation
reaction
(HzOR).
However,
lack
self-supporting
electrodes
excellent
bifunctional
performance
key
problem
high
operating
voltages.
Herein,
a
unique
electrodeposition
first
developed
design
(P–Co/Ni3P)A3/NF
(NF
=
nickel
foam)
electrode,
which
has
hierarchical
heterostructure
for
more
active
sites
and
robust
interface
interactions,
resulting
in
activity.
The
electrode
exhibits
small
potentials
−10
−79
mV
at
10
mA
cm–2
as
well
low
Tafel
slopes
45
1.8
dec–1
evolution
(HER)
HzOR,
respectively.
Inspiringly,
extremely
small-cell
voltage
50
required
current
density
300
two-electrode
device,
1.77
V
lower
than
that
overall
splitting
(1.82
V)
system.
Density
functional
theory
calculations
confirm
construction
P–Co/Ni3P
achieves
improvement
calculated
adsorption
energy
H2O
molecule
(ΔGH2O),
ΔGH*,
dehydrogenation
kinetics
intermediates,
thereby
accelerating
electrocatalytic
activity
HER/HzOR.
Our
suggests
possibility
development
other
material
synthesis
optimization
production.
ACS Applied Energy Materials,
Journal Year:
2023,
Volume and Issue:
6(18), P. 9577 - 9584
Published: Sept. 11, 2023
Structural
engineering
of
the
molybdenum
disulfide
(MoS2)
retains
its
importance
for
application
hydrogen
evolution
reaction
(HER)
in
a
full
pH
range.
However,
catalytic
performance
reported
MoS2-based
materials,
especially
neutral
conditions,
is
unsatisfactory.
Herein,
an
effective
synergy
between
CoP,
Ni2P,
and
MoS2
nanosheets
established
via
simple
strategy,
which
constructs
self-supporting
(CoP/Ni2P/MoS2–CC)
electrode
endowed
with
abundant
active
sites,
optimal
electronic
structure,
improved
charge
transfer
capability.
The
optimized
CoP/Ni2P/MoS2–CC
sample
shows
low
overpotentials
335,
119,
211
mV
at
100
mA
cm–2
neutral,
alkaline,
acidic
electrolytes
small
Tafel
slopes
63,
62,
82
dec–1,
respectively.
Remarkably,
medium
superior
to
that
most
hybrid
electrocatalysts.
Our
work
proves
facile
feasible
strategy
promote
pH-universal
activities
heterogeneous
structures
production.
