Usually,
electrocatalysts
depend
on
pH
value
for
hydrogen
evolution
reaction
(HER)
limit
their
practical
application.
In
this
study,
NiMo
alloys
were
synthesized
nickel
foam
(NF)
using
electrodeposition.
Furthermore,
the
proportions
of
two
metallic
elements
in
electrolyte,
current
density
and
deposition
time
can
affect
catalytic
performance.
Specifically,
optimized
Ni0.8Mo0.8/NF
shows
highly
efficient
performances
towards
HER
acidic,
neutral,
alkaline,
alkaline
seawater.
At
100
mA·cm-2,
overpotential
values
are
111,
366,
158,
163
mV,
respectively.
In-situ
Raman
spectroscopy
indicates
presence
multiple
active
sites
during
process.
Moreover,
functional
theory
(DFT)
reveals
synergistic
effect
between
metals
optimizes
material
structure,
reducing
free
energy
H2O
H*
adsorption
catalyst
surface
acidic
environments.
This
work
provides
deep
insights
into
designing
cost-effective
all-pH-value
Chemistry - A European Journal,
Journal Year:
2024,
Volume and Issue:
30(41)
Published: May 22, 2024
Abstract
Cobalt
phosphosulphide
(CoPS)
has
recently
been
recognized
as
a
potentially
effective
electrocatalyst
for
the
hydrogen
evolution
reaction
(HER).
However,
there
have
no
research
on
design
of
CoPS‐based
heterojunctions
to
boost
their
HER
performance.
Herein,
CoPS/Co
4
S
3
heterojunction
was
prepared
by
phosphating
treatment
based
defect‐rich
flower‐like
Co
1‐x
precursors.
The
high
specific
surface
area
nanopetals,
together
with
structure
inhomogeneous
strain,
exposes
more
active
sites
in
catalyst.
electronic
catalyst
is
reconfigured
result
interfacial
interactions,
which
promote
catalyst‘s
ability
adsorb
and
conduct
electricity.
synergistic
effect
dual‐site
further
enhance
catalytic
activity.
overpotentials
61
70
mV
attain
current
density
10
mA
cm
−2
acidic
alkaline
media,
respectively,
renders
it
competitive
previously
reported
analogous
catalysts.
This
work
proposes
an
technique
constructing
transition
metal
phosphosulfide
heterojunctions,
well
development
efficient
electrocatalyst.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 12, 2024
Abstract
Efficient
and
stable
bifunctional
catalysts
for
hydrogen
oxygen
evolution
reaction
play
an
important
role
in
realizing
economy.
In
this
study,
the
multi‐heterogeneous
interfacial
catalyst,
Ni
2
P@FeP@Co
P
(denoted
as
NFC),
with
asymmetric
built‐in
electric
field
is
successfully
designed
synthesized.
Benefiting
from
double
charge
balance
effect,
NFC
exhibits
superior
(HER)
(OER)
catalytic
activity.
Importantly,
NFC‐assembled
anion‐exchange
membrane
(AEM)
electrolyzer
enhanced
performance
remarkable
stability
at
industrial
current
densities
high
temperatures,
reaching
a
density
of
1000
mA
cm
−2
small
voltage
1.95
V.
The
results
dynamic
X‐ray
photoelectron
spectroscopy
tests
indicate
that
self‐reconfiguration
during
OER
provides
additional
active
sites
reaction.
functional
theory
(DFT)
demonstrate
(BIEF)
induces
adaptive
distribution
charge,
which
optimizes
adsorption
desorption
hydrogen/oxygen
intermediates
reaction,
thereby
enhancing
kinetics
overall
water
splitting
process.
This
work
presents
novel
strategies
design
highly
energy
conversion.
Sustainable Energy & Fuels,
Journal Year:
2024,
Volume and Issue:
8(18), P. 4272 - 4280
Published: Jan. 1, 2024
Dealloying-derived
intermetallic
MnNi
3
possesses
porous-ligament
structure
with
an
ultra-large
specific
surface
area,
exhibiting
superior
electrocatalytic
activity
and
robustness
towards
alkaline
hydrogen
evolution
industrial
water
electrolysis.
ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(34), P. 44817 - 44829
Published: Aug. 19, 2024
Cobalt
phosphide
has
received
much
attention
as
an
efficient
catalyst
for
electrocatalytic
hydrodechlorination
(EHDC).
However,
the
active
species
proton
hydrogen
(H*)
is
consumed
by
evolution
reaction
(HER).
Herein,
we
report
a
crystal
regulation
strategy
cobalt
phosphate/graphitic
nanocarbon/nickel
foam
(CoPO/GC/NF)
catalysts
applied
EHDC
of
2,4-dichlorophenoxyacetic
acid
(2,4-D).
Characterization
revealed
that
during
high-temperature
phosphatization
process,
CoPO/GC/NF
developed
Co(PO
