Advanced Materials,
Journal Year:
2022,
Volume and Issue:
34(37)
Published: July 28, 2022
Hydrogen
spillover
(HSo)
has
emerged
to
upgrade
the
hydrogen
evolution
reaction
(HER)
activity
of
Pt-support
electrocatalysts,
but
it
is
not
applicable
deprotonated
oxygen
(OER).
Non-precious
catalysts
that
can
perform
well
in
both
HSo
and
deprotonation
(DeP)
are
extremely
desirable
for
a
sustainable
economy.
Herein,
an
affordable
MoS2
/NiPS3
vertical
heterostructure
catalyst
presented
synergize
DeP
efficient
water
electrolysis.
The
internal
polarization
field
(IPF)
clarified
as
driving
force
HER
electrocatalysis.
from
edge
NiPS3
activate
basal
plane
boost
(112
mV
vs
reversible
electrode
(RHE)
at
10
mA
cm-2
),
while
OER,
IPF
facilitate
hydroxyl
diffusion
render
-to-NiPS3
/P-to-S
dual-pathways
DeP.
As
result,
stacking
OER-inactive
on
surface
still
brings
intriguing
OER
enhancements.
With
them
serving
couples,
overall
splitting
attested
stably
with
cell
voltage
1.64
V
.
This
research
puts
forward
criterion
rational
design
HSo/DeP-unified
non-precious
Advanced Materials,
Journal Year:
2019,
Volume and Issue:
32(3)
Published: April 1, 2019
Abstract
Electrochemical
water
splitting
is
a
promising
technology
for
sustainable
conversion,
storage,
and
transport
of
hydrogen
energy.
Searching
earth‐abundant
hydrogen/oxygen
evolution
reaction
(HER/OER)
electrocatalysts
with
high
activity
durability
to
replace
noble‐metal‐based
catalysts
plays
paramount
importance
in
the
scalable
application
electrolysis.
A
freestanding
electrode
architecture
highly
attractive
as
compared
conventional
coated
powdery
form
because
enhanced
kinetics
stability.
Herein,
recent
progress
developing
transition‐metal‐based
HER/OER
electrocatalytic
materials
reviewed
selected
examples
chalcogenides,
phosphides,
carbides,
nitrides,
alloys,
phosphates,
oxides,
hydroxides,
oxyhydroxides.
Focusing
on
self‐supported
electrodes,
latest
advances
their
structural
design,
controllable
synthesis,
mechanistic
understanding,
strategies
performance
enhancement
are
presented.
Remaining
challenges
future
perspectives
further
development
also
discussed.
Journal of the American Chemical Society,
Journal Year:
2020,
Volume and Issue:
142(9), P. 4298 - 4308
Published: Jan. 30, 2020
Defect
engineering
is
widely
applied
in
transition
metal
dichalcogenides
(TMDs)
to
achieve
electrical,
optical,
magnetic,
and
catalytic
regulation.
Vacancies,
regarded
as
a
type
of
extremely
delicate
defect,
are
acknowledged
be
effective
flexible
general
modulation.
However,
the
influence
vacancy
states
addition
concentration
on
catalysis
still
remains
vague.
Thus,
via
high
throughput
calculations,
optimized
sulfur
(S-vacancy)
state
terms
both
distribution
initially
figured
out
among
series
MoS2
models
for
hydrogen
evolution
reaction
(HER).
In
order
realize
it,
facile
mild
H2O2
chemical
etching
strategy
implemented
introduce
homogeneously
distributed
single
S-vacancies
onto
nanosheet
surface.
By
systematic
tuning
duration,
temperature,
solution
concentration,
comprehensive
modulation
S-vacancy
achieved.
The
optimal
HER
performance
reaches
Tafel
slope
48
mV
dec–1
an
overpotential
131
at
current
density
10
mA
cm–2,
indicating
superiority
over
agglomerate
S-vacancies.
This
ascribed
more
surface
electronic
structure
well
boosted
electrical
transport
properties.
bridging
gap,
some
extent,
between
precise
design
from
theory
practical
experiments,
proposed
extends
defect
sophisticated
level
further
unlock
potential
enhancement.
Nature Communications,
Journal Year:
2020,
Volume and Issue:
11(1)
Published: Oct. 29, 2020
Rational
design
of
the
catalysts
is
impressive
for
sustainable
energy
conversion.
However,
there
a
grand
challenge
to
engineer
active
sites
at
interface.
Herein,
hierarchical
transition
bimetal
oxides/sulfides
heterostructure
arrays
interacting
two-dimensional
MoOx/MoS2
nanosheets
attached
one-dimensional
NiOx/Ni3S2
nanorods
were
fabricated
by
oxidation/hydrogenation-induced
surface
reconfiguration
strategy.
The
NiMoOx/NiMoS
array
exhibits
overpotentials
38
mV
hydrogen
evolution
and
186
oxygen
10
mA
cm-2,
even
surviving
large
current
density
500
cm-2
with
long-term
stability.
Due
optimized
adsorption
energies
accelerated
water
splitting
kinetics
theory
calculations,
assembled
two-electrode
cell
delivers
industrially
relevant
densities
1000
record
low
voltages
1.60
1.66
V
excellent
durability.
This
research
provides
promising
avenue
enhance
electrocatalytic
performance
engineering
interfacial
toward
large-scale
splitting.
Advanced Functional Materials,
Journal Year:
2019,
Volume and Issue:
29(20)
Published: Jan. 21, 2019
Abstract
Electrochemical
water
splitting
is
recognized
as
a
practical
strategy
for
impelling
the
transformation
of
sustainable
energy
sources
such
solar
from
electricity
to
clean
hydrogen
fuel.
To
actualize
large‐scale
production,
it
paramount
develop
low‐cost,
earth‐abundant,
efficient,
and
stable
electrocatalysts.
Among
those
electrocatalysts,
alternative
architectural
arrays
grown
on
conductive
substrates
have
been
proven
be
highly
efficient
toward
due
large
surface
area,
abundant
active
sites,
synergistic
effects
between
electrocatalysts
substrates.
Herein,
advancement
nanoarray
architectures
in
electrocatalytic
applications
reviewed.
The
categories
different
nanoarrays
reliable
versatile
synthetic
approaches
are
summarized.
A
unique
emphasis
highlighted
promising
strategies
enhance
activities
stability
by
component
manipulation,
heterostructure
regulation,
vacancy
engineering.
intrinsic
mechanism
analysis
electronic
structure
optimization,
intermediates'
adsorption
facilitation,
coordination
environments'
amelioration
also
discussed
with
regard
theoretical
simulation
situ
identification.
Finally,
challenges
opportunities
valuable
directions
pathways
outstanding
performance
provided
conversion
field,
facilitating
development
systems.
Advanced Energy Materials,
Journal Year:
2019,
Volume and Issue:
9(21)
Published: April 10, 2019
Abstract
Electrocatalytic
water
splitting
is
one
of
the
sustainable
and
promising
strategies
to
generate
hydrogen
fuel
but
still
remains
a
great
challenge
because
sluggish
anodic
oxygen
evolution
reaction
(OER).
A
very
effective
approach
dramatically
decrease
input
cell
voltage
electrolysis
replace
OER
with
hydrazine
oxidation
(HzOR)
due
its
lower
thermodynamic
potential.
Therefore,
developing
low‐cost
efficient
HzOR
catalysts,
coupled
cathodic
(HER),
tremendously
important
for
energy‐saving
electrolytic
production.
Herein,
new‐type
copper–nickel
nitride
(Cu
1
Ni
2
‐N)
rich
Cu
4
N/Ni
3
N
interface
rationally
constructed
on
carbon
fiber
cloth.
The
3D
electrode
exhibits
extraordinary
HER
performance
an
overpotential
71.4
mV
at
10
mA
cm
−2
in
1.0
m
KOH,
simultaneously
delivering
ultralow
potential
0.5
KOH/0.5
electrolyte.
Moreover,
utilizing
synthesized
‐N
as
both
cathode
anode
display
0.24
V
excellent
stability
over
75
h.
present
work
develops
copper–nickel‐based
bifunctional
electrocatalyst
through
hydrazine‐assistance
Advanced Materials,
Journal Year:
2020,
Volume and Issue:
32(32)
Published: June 28, 2020
Lithium-sulfur
(Li-S)
batteries
are
recognized
as
promising
candidates
for
next-generation
electrochemical
energy
storage
systems
owing
to
their
high
density
and
cost-effective
raw
materials.
However,
the
sluggish
multielectron
sulfur
redox
reactions
root
cause
of
most
issues
Li-S
batteries.
Herein,
a
high-efficiency
CoSe
electrocatalyst
with
hierarchical
porous
nanopolyhedron
architecture
(CS@HPP)
derived
from
metal-organic
framework
is
presented
host
The
CS@HPP
crystal
quality
abundant
reaction
active
sites
can
catalytically
accelerate
capture/diffusion
polysulfides
precipitation/decomposition
Li2
S.
Thus,
cathode
exhibits
an
excellent
capacity
1634.9
mAh
g-1
,
rate
performance,
long
cycle
life
low
decay
0.04%
per
over
1200
cycles.
nanopolyhedrons
further
fabricated
on
carbon
cloth
(CC@CS@HPP)
unfold
electrocatalytic
activity
by
its
electrical
conductivity
large
surface
area.
A
freestanding
CC@CS@HPP
loading
8.1
mg
cm-2
delivers
areal
under
lean
electrolyte.
This
work
will
enlighten
rational
design
structure-catalysis
engineering
transition-metal-based
nanomaterials
diverse
applications.
