Advanced Energy Materials,
Journal Year:
2021,
Volume and Issue:
11(39)
Published: Sept. 1, 2021
Abstract
Over
the
years,
significant
advances
have
been
made
to
boost
efficiency
of
water
splitting
by
carefully
designing
economic
electrocatalysts
with
augmented
conductivity,
more
accessible
active
sites,
and
high
intrinsic
activity
in
laboratory
test
conditions.
However,
it
remains
a
challenge
develop
earth‐abundant
catalysts
that
can
satisfy
demands
practical
electrolysis,
is,
outstanding
all‐pH
electrolyte
capacity,
direct
seawater
ability,
exceptional
performance
for
overall
splitting,
superior
large‐current‐density
activity,
robust
long‐term
durability.
In
this
context,
considering
features
increased
species
loading,
rapid
charge,
mass
transfer,
strong
affinity
between
catalytic
components
substrates,
easily‐controlled
wettability,
as
well
as,
enhanced
bifunctional
performance,
self‐supported
are
presently
projected
be
most
suitable
contenders
massive
scale
hydrogen
generation.
review,
comprehensive
introduction
design
fabrication
an
emphasis
on
deposited
nanostructured
catalysts,
selection
various
methods
provided.
Thereafter,
recent
development
promising
applications
is
reviewed
from
aforementioned
aspects.
Finally,
brief
conclusion
delivered
challenges
perspectives
relating
promotion
sustainable
large‐scale
production
discussed.
ACS Catalysis,
Journal Year:
2018,
Volume and Issue:
8(3), P. 2236 - 2241
Published: Feb. 6, 2018
It
is
vitally
essential
to
design
highly
efficient
and
cost-effective
bifunctional
electrocatalysts
toward
water
splitting.
Herein,
we
report
the
development
of
P-doped
Co3O4
nanowire
array
on
nickel
foam
(P-Co3O4/NF)
from
through
low-temperature
annealing,
using
NaH2PO2
as
P
source.
As
a
3D
catalyst,
such
P-Co3O4/NF
demonstrates
superior
performance
for
oxygen
evolution
reaction
with
low
overpotential
(260
mV
at
20
mA
cm–2),
small
Tafel
slope
(60
dec–1),
satisfying
durability
in
1.0
M
KOH.
Density
functional
theory
calculations
indicate
that
P-Co3O4
has
free-energy
value
much
smaller
than
pristine
potential
determining
step
reaction.
Such
also
performs
efficiently
hydrogen
reaction,
two-electrode
alkaline
electrolyzer
assembled
by
P8.6-Co3O4/NF
both
anode
cathode
needs
only
1.63
V
reach
water-splitting
current
10
cm–2.
ACS Catalysis,
Journal Year:
2018,
Volume and Issue:
8(6), P. 5431 - 5441
Published: May 3, 2018
The
development
of
bifunctional
electrocatalysts
with
high
performance
for
both
hydrogen
evolution
reaction
(HER)
and
oxygen
(OER)
earth-abundant
elements
is
still
a
challenge
in
electrochemical
water
splitting
technology.
Herein,
we
fabricated
free-standing
electrocatalyst
the
form
vertically
oriented
Fe-doped
Ni3S2
nanosheet
array
grown
on
three-dimensional
(3D)
Ni
foam
(Fe-Ni3S2/NF),
which
presented
activity
durability
HER
OER
alkaline
media.
On
basis
systematic
experiments
calculation,
Fe-doping
was
evidenced
to
increase
surface
area,
improve
adsorption
ability,
optimize
energy
Ni3S2,
resulted
enhancement
Fe-Ni3S2/NF.
Moreover,
metal
sites
Fe-Ni3S2/NF
were
proved
play
significant
role
process.
During
catalysis
OER,
formation
Ni–Fe
(oxy)hydroxide
observed
near-surface
section
Fe-Ni3S2/NF,
introduction
Fe
element
dramatically
enhanced
Ni3S2.
overall
electrolyzer
assembled
by
exhibited
low
cell
voltage
(1.54
V
@
10
mA
cm–2)
1
M
KOH.
This
work
demonstrated
promising
electrolysis
media
potential
application
future.
Advanced Science,
Journal Year:
2019,
Volume and Issue:
6(14)
Published: May 20, 2019
Abstract
Designing
and
constructing
bifunctional
electrocatalysts
is
vital
for
water
splitting.
Particularly,
the
rational
interface
engineering
can
effectively
modify
active
sites
promote
electronic
transfer,
leading
to
improved
splitting
efficiency.
Herein,
free‐standing
defect‐rich
heterogeneous
MoS
2
/NiS
nanosheets
overall
are
designed.
The
abundant
interfaces
in
not
only
provide
rich
electroactive
but
also
facilitate
electron
which
further
cooperate
synergistically
toward
electrocatalytic
reactions.
Consequently,
optimal
show
enhanced
performances
as
This
study
may
open
up
a
new
route
rationally
maximize
their
electrochemical
performances,
help
accelerate
development
of
nonprecious
Advanced Energy Materials,
Journal Year:
2020,
Volume and Issue:
10(17)
Published: March 16, 2020
Abstract
Rational
design
and
construction
of
bifunctional
electrocatalysts
with
excellent
activity
durability
is
imperative
for
water
splitting.
Herein,
a
novel
top‐down
strategy
to
realize
hierarchical
branched
Mo‐doped
sulfide/phosphide
heterostructure
(Mo‐Ni
3
S
2
/Ni
x
P
y
hollow
nanorods),
by
partially
phosphating
Mo‐Ni
/NF
flower
clusters,
proposed.
Benefitting
from
the
optimized
electronic
structure
configuration,
nanorod
structure,
abundant
heterogeneous
interfaces,
as‐obtained
multisite
electrode
has
remarkable
stability
electrocatalytic
in
hydrogen
evolution
reaction
(HER)/oxygen
(OER)
1
m
KOH
solutions.
It
possesses
an
extremely
low
overpotential
238
mV
at
current
density
50
mA
cm
−2
OER.
Importantly,
when
assembled
as
anode
cathode
simultaneously,
it
merely
requires
ultralow
cell
voltage
1.46
V
achieve
10
,
over
72
h,
outperforming
most
reported
Ni‐based
materials.
Density
functional
theory
results
further
confirm
that
doped
can
synergistically
optimize
Gibbs
free
energies
H
O‐containing
intermediates
(OH*,
O*,
OOH*)
during
HER
OER
processes,
thus
accelerating
catalytic
kinetics
electrochemical
This
work
demonstrates
importance
rational
combination
metal
doping
interface
engineering
advanced
Nano-Micro Letters,
Journal Year:
2020,
Volume and Issue:
12(1)
Published: June 17, 2020
Abstract
Hydrogen
(H
2
)
production
is
a
latent
feasibility
of
renewable
clean
energy.
The
industrial
H
obtained
from
reforming
natural
gas,
which
consumes
large
amount
nonrenewable
energy
and
simultaneously
produces
greenhouse
gas
carbon
dioxide.
Electrochemical
water
splitting
promising
approach
for
the
production,
sustainable
pollution-free.
Therefore,
developing
efficient
economic
technologies
electrochemical
has
been
an
important
goal
researchers
around
world.
utilization
green
systems
to
reduce
overall
consumption
more
production.
Harvesting
converting
environment
by
different
can
efficiently
decrease
external
power
consumption.
A
variety
producing
,
such
as
two-electrode
electrolysis
water,
driven
photoelectrode
devices,
solar
cells,
thermoelectric
triboelectric
nanogenerator,
pyroelectric
device
or
water–gas
shift
device,
have
developed
recently.
In
this
review,
some
notable
progress
made
in
cells
discussed
detail.
We
hoped
review
guide
people
pay
attention
development
system
generate
pollution-free
energy,
will
realize
whole
process
with
low
cost,
sustainability
conversion.
Journal of Materials Chemistry A,
Journal Year:
2021,
Volume and Issue:
9(9), P. 5320 - 5363
Published: Jan. 1, 2021
This
review
summarizes
recent
advances
relating
to
transition
metal
sulfide
(TMS)-based
bifunctional
electrocatalysts,
providing
guidelines
for
the
design
and
fabrication
of
TMS-based
catalysts
practical
application
in
water
electrolysis.
Advanced Materials,
Journal Year:
2018,
Volume and Issue:
30(29)
Published: May 28, 2018
Abstract
The
layer‐structured
MoS
2
is
a
typical
hydrogen
evolution
reaction
(HER)
electrocatalyst
but
it
possesses
poor
activity
for
the
oxygen
(OER).
In
this
work,
cobalt
covalent
doping
approach
capable
of
inducing
HER
and
OER
bifunctionality
into
efficient
overall
water
splitting
reported.
results
demonstrate
that
covalently
can
lead
to
dramatically
enhanced
while
simultaneously
remarkable
activity.
catalyst
with
optimal
density
readily
achieve
onset
potentials
−0.02
1.45
V
(vs
reversible
electrode
(RHE))
in
1.0
m
KOH.
Importantly,
deliver
high
current
densities
10,
100,
200
mA
cm
−2
at
low
overpotentials
48,
132,
165
mV
260,
350,
390
mV,
respectively.
reported
activation
be
adapted
bifunctionalization
other
transition
metal
dichalcogenides.
ACS Nano,
Journal Year:
2018,
Volume and Issue:
12(12), P. 12369 - 12379
Published: Dec. 3, 2018
As
one
of
the
most
remarkable
oxygen
evolution
reaction
(OER)
electrocatalysts,
metal
chalcogenides
have
been
intensively
reported
during
past
few
decades
because
their
high
OER
activities.
It
has
that
electron-chemical
conversion
into
oxides/hydroxides
would
take
place
after
OER.
However,
transition
mechanism
such
unstable
structures,
as
well
real
active
sites
and
catalytic
activity
for
these
not
understood
yet;
therefore
a
direct
observation
electrocatalytic
water
oxidation
process,
especially
at
nano
or
even
angstrom
scale,
is
urgently
needed.
In
this
research,
by
employing
advanced
Cs-corrected
transmission
electron
microscopy
(TEM),
step
oxidational
amorphous
electrocatalyst
CoS
x
crystallized
CoOOH
in
situ
captured:
irreversible
to
initiated
on
surface
electrocatalysts
with
morphology
change
via
Co(OH)2
intermediate
measurement,
where
confirmed
species.
Besides,
process
also
multiple
applications
X-ray
photoelectron
spectroscopy
(XPS),
Fourier-transform
infrared
(FTIR),
other
ex
technologies.
Moreover,
basis
discovery,
high-efficiency
nitrogen-doped
graphene
foam
(NGF)
coated
explored
through
thorough
structure
transformation
CoOOH.
We
believe
in-depth
structural
measurement
can
provide
insights
fundamental
understanding
catalysts,
thus
enabling
more
rational
design
low-cost
high-efficient
splitting.
Advanced Materials,
Journal Year:
2018,
Volume and Issue:
30(35)
Published: July 10, 2018
Abstract
Exploring
highly
efficient
and
low‐cost
electrocatalysts
for
electrochemical
water
splitting
is
of
importance
the
conversion
intermediate
energy.
Herein,
synthesis
dual‐cation
(Fe,
Co)‐incorporated
NiSe
2
nanosheets
Co‐NiSe
)
systematical
investigation
their
electrocatalytic
performance
as
a
function
composition
are
reported.
The
incorporation
can
distort
lattice
induce
stronger
electronic
interaction,
leading
to
increased
active
site
exposure
optimized
adsorption
energy
reaction
intermediates
compared
single‐cation‐doped
or
pure
.
As
result,
obtained
Fe
0.09
Co
0.13
‐NiSe
porous
nanosheet
electrode
shows
an
catalytic
activity
with
low
overpotential
251
mV
oxygen
evolution
92
hydrogen
(both
at
10
mA
cm
−2
in
1
m
KOH).
When
used
bifunctional
electrodes
overall
splitting,
current
density
achieved
cell
voltage
1.52
V.
This
work
highlights
doping
enhancing
electrocatalyst
transition
metal
dichalcogenides.
