Nano-Micro Letters,
Journal Year:
2024,
Volume and Issue:
16(1)
Published: Feb. 14, 2024
Abstract
The
metal-lightweighted
electrocatalysts
for
water
splitting
are
highly
desired
sustainable
and
economic
hydrogen
energy
deployments,
but
challengeable.
In
this
work,
a
low-content
Ni-functionalized
approach
triggers
the
high
capability
of
black
phosphorene
(BP)
with
oxygen
evolution
reaction
(HER/OER)
bifunctionality.
Through
facile
in
situ
electro-exfoliation
route,
ionized
Ni
sites
covalently
functionalized
BP
nanosheets
electron
redistribution
controllable
metal
contents.
It
is
found
that
as-fabricated
Ni-BP
can
drive
much
enhanced
HER
OER
activities.
1.0
M
KOH
electrolyte,
optimized
1.5
wt%
have
readily
achieved
low
overpotentials
136
mV
230
at
10
mA
cm
−2
.
Moreover,
bonding
between
P
has
also
strengthened
catalytic
stability
electrocatalyst,
stably
delivering
overall
50
h
20
Theoretical
calculations
revealed
Ni–P
covalent
binding
regulate
electronic
structure
optimize
barrier
to
improve
activity
effectively.
This
work
confirms
suitable
candidate
electrocatalytic
splitting,
provides
effective
strategies
constructing
electrocatalysts.
Deleted Journal,
Journal Year:
2022,
Volume and Issue:
1, P. e9120029 - e9120029
Published: Aug. 25, 2022
In
the
21st
century,
rapid
development
of
human
society
has
made
people's
demand
for
green
energy
more
and
urgent.
The
high-energy-density
hydrogen
obtained
by
fully
splitting
water
is
not
only
environmentally
friendly,
but
also
expected
to
solve
problems
caused
intermittent
nature
new
energy.
However,
slow
kinetics
large
overpotential
oxygen
evolution
reaction
(OER)
limit
its
application.
introduction
Te
element
bring
breakthroughs.
With
least
electronegativity
among
chalcogens,
many
special
properties,
such
as
multivalent
states,
strong
covalentity,
high
electrical
conductivity,
which
make
it
a
promising
candidate
in
electrocatalytic
OER.
this
review,
we
introduce
peculiarities
element,
summarize
doping
extraordinary
performance
compounds
OER,
with
emphasis
on
scientific
mechanism
behind
promoting
OER
kinetic
process.
Finally,
challenges
prospects
applications
are
presented.
Advanced Energy Materials,
Journal Year:
2023,
Volume and Issue:
13(22)
Published: April 28, 2023
Abstract
Efficient
and
stable
low‐cost
catalysts
are
seriously
lacking
for
industrial
water
electrolysis
at
large‐current‐density.
To
meet
industrial‐scale
hydrogen
production,
fully
utilized
active
sites
by
a
rational
structure
design
is
an
attractive
route.
Herein,
dynamic
microstructure
manipulation
of
bimetallic
phosphide
NiCoP
conducted.
Among
different
microstructures
NiCoP,
as‐obtained
NiCoP‐120
hydrothermal
temperature
120
°C,
shows
special
multiscale
hierarchical
from
3D‐nickel
foam
substrates,
2D‐nanosheets
to
1D‐nanoneedles,
which
conducive
efficient
utilization
rapid
gas
release,
thus
manifesting
outstanding
electrocatalytic
activities
stability
as
required
industry.
reach
current
density
10
1000
mA
cm
−2
the
evolution
reaction
(HER),
requires
ultra‐low
overpotentials
56
247
mV,
respectively.
Particularly,
bifunctional
catalyst,
it
only
needs
1.981
V
drive
1
A
overall
splitting
can
maintain
output
600
h,
superior
almost
all
reported
non‐noble
metal
catalysts.
Moreover,
its
application
prospect
in
integrated
green
energy‐to‐hydrogen
systems,
including
sunlight,
wind,
thermal,
lithium
cells,
well
demonstrated.
This
work
provides
guiding
strategy
establishment
externally
driven
water‐splitting
production
system.
Angewandte Chemie International Edition,
Journal Year:
2022,
Volume and Issue:
62(6)
Published: Dec. 3, 2022
Abstract
It
is
vitally
important
to
develop
highly
active,
robust
and
low‐cost
transition
metal‐based
electrocatalysts
for
overall
water
splitting
in
neutral
solution
especially
at
large
current
density.
In
this
work,
amorphous
Mo‐doped
NiS
0.5
Se
nanosheets@crystalline
nanorods
(Am−Mo−NiS
)
was
synthesized
using
a
facil
one‐step
strategy.
phosphate
buffer
saline
solution,
the
Am−Mo−NiS
shows
tiny
overpotentials
of
48
209
mV
hydrogen
evolution
reaction
(HER),
238
514
oxygen
(OER)
10
1000
mA
cm
−2
,
respectively.
Moreover,
delivers
excellent
stability
least
300
h
without
obvious
degradation.
Theoretical
calculations
revealed
that
Ni
sites
defect‐rich
structure
owns
higher
electron
state
density
strengthened
binding
energy
H
2
O,
which
will
optimize
adsorption/desorption
barriers
reduce
adsorption
OER
determining
step.
Advanced Science,
Journal Year:
2023,
Volume and Issue:
10(32)
Published: Oct. 9, 2023
The
oxygen
evolution
reaction
(OER)
activity
of
transition
metal
(TM)-based
(oxy)hydroxide
is
dominated
by
the
number
and
nature
surface
active
sites,
which
are
generally
considered
to
be
TM
atoms
occupying
less
than
half
with
most
being
inactive
atoms.
Herein,
based
on
an
in
situ
competing
growth
strategy
bimetallic
ions
OH-
ions,
a
facile
one-step
method
proposed
modulate
defects
NiFe-layered
double
hydroxide
(NiFe-LDH)/FeOOH
heterostructure,
may
trigger
single
lattice
mechanism
(sLOM).
Interestingly,
only
varying
addition
H2
O2
,
one
can
simultaneously
regulate
concentration
defects,
valence
ratio
components.
proper
promote
synergy
between
adsorbate
(AEM,
redox
chemistry)
sLOM
(oxygen
OER
NiFe-based
(oxy)hydroxide,
practically
maximizing
use
as
sites.
Consequently,
optimal
NiFe-LDH/FeOOH
heterostructure
outperforms
reported
non-noble
catalysts
electrocatalytic
activity,
overpotential
177
mV
deliver
current
density
20
mA
cm-2
high
stability.
novel
exemplifies
versatile
approach
designing
highly
TM-LDH-based
electrocatalysts
for
energy
environmental
applications.
Nano Letters,
Journal Year:
2023,
Volume and Issue:
23(5), P. 1735 - 1742
Published: Feb. 14, 2023
We
design
single-atom
W
confined
in
MoO3-x
amorphous
nanosheets
(W1/MoO3-x)
comprising
W1-O5
motifs
as
a
highly
active
and
durable
NORR
catalyst.
Theoretical
operando
spectroscopic
investigations
reveal
the
dual
functions
of
to
(1)
facilitate
activation
protonation
NO
molecules
(2)
promote
H2O
dissociation
while
suppressing
*H
dimerization
increase
proton
supply,
eventually
resulting
self-tandem
mechanism
W1/MoO3-x
greatly
accelerate
energetics
NO-to-NH3
pathway.
As
result,
exhibits
highest
NH3-Faradaic
efficiency
91.2%
NH3
yield
rate
308.6
μmol
h-1
cm-2,
surpassing
that
most
previously
reported
catalysts.
Journal of the American Chemical Society,
Journal Year:
2022,
Volume and Issue:
144(25), P. 11138 - 11147
Published: June 8, 2022
Developing
efficient
hydrogen
oxidation
reaction
(HOR)
electrocatalysts
in
alkaline
media
is
of
great
significance
for
anion
exchange
membrane
fuel
cells.
Herein,
we
report
the
synthesis
hollow
colloidosomes
composed
Ru
nanocrystals
based
on
a
novel
gas/liquid
interface
self-assembly
strategy.
Structural
characterizations
reveal
that
much
defects
are
present
building
block
(Ru
nanocrystals)
colloidosomes.
Theoretical
calculations
suggest
structure
can
optimize
adsorption
binding
energy
intermediates
HOR.
Benefiting
from
assembled
colloidosome
and
optimized
electronic
structure,
exhibit
remarkable
HOR
catalytic
performance
with
mass
activity
higher
than
benchmark
Pt/C.
Our
work
may
shed
new
light
rational
design
advanced
an
energy-related
applications.
