Advanced Energy Materials,
Journal Year:
2022,
Volume and Issue:
12(8)
Published: Jan. 9, 2022
Abstract
Tuning
active
sites
in
catalyst
design
is
the
key
to
boosting
intrinsic
activity
of
hydrogen
evolution
reaction
(HER).
Cationic
Ni
has
been
widely
established
as
an
site
nickel
sulfide
due
relatively
low
Gibbs
free
energy
adsorption
(
Δ
G
H*
).
However,
one
big
unsettled
issues
whether
S
can
be
activated
a
more
than
NiS
2
.
Herein,
swapping
catalytic
from
cationic
anionic
hierarchical
structure
consisting
nanoflowers
grown
on
dual‐phased
‐NiS
foam
(denoted
/NiS
‐NiS)
shown.
A
combined
study
theoretical
calculations
and
X‐ray
photoelectron
spectroscopy
analysis
demonstrate
remarkably
antidromic
electron
transfer
sites,
therefore
relieving
species
endowing
higher
at
over
site.
The
new
exhibits
superior
HER
performance,
identified
by
doubling
twofold
increased
turnover
frequency
value
compared
its
pure
counterpart
(0.028
s
−1
vs
0.015
applied
overpotential
200
mV).
electrode
also
demonstrates
outstanding
toward
oxygen
overall
water
splitting.
Energy & Environmental Science,
Journal Year:
2021,
Volume and Issue:
14(4), P. 1897 - 1927
Published: Jan. 1, 2021
The
review
summarizes
transition
metal-based
bimetallic
MOFs
and
their
derived
materials
as
electrocatalytic
for
the
OER.
mechanisms
of
OER
probed
by
DFT
calculation
andin
situcharacterization
techniques
are
also
discussed.
Chemical Society Reviews,
Journal Year:
2021,
Volume and Issue:
50(17), P. 9817 - 9844
Published: Jan. 1, 2021
This
review
summarizes
the
recent
progress
related
to
field
of
doping
regulation
in
transition
metal
compounds,
aiming
give
an
overview
this
strategy
for
designing
high-performance
catalysts
towards
electrocatalytic
applications.
Energy & Environmental Science,
Journal Year:
2021,
Volume and Issue:
14(4), P. 1722 - 1770
Published: Jan. 1, 2021
A
tuned
electronic
structure
favors
the
electrocatalytic
water
splitting
reactionviaaccelerating
reaction
kinetics,
changing
rate-determining
step,
and
optimizing
adsorption
energy
for
intermediates;
this
is
achievedviaintentionally
incorporating
imperfections
into
crystal
lattices
of
electrocatalysts.
Advanced Materials,
Journal Year:
2021,
Volume and Issue:
33(9)
Published: Jan. 29, 2021
Abstract
The
slow
kinetics
of
oxygen
evolution
reaction
(OER)
causes
high
power
consumption
for
electrochemical
water
splitting.
Various
strategies
have
been
attempted
to
accelerate
the
OER
rate,
but
there
are
few
studies
on
regulating
transport
reactants
especially
under
large
current
densities
when
mass
transfer
factor
dominates
reactions.
Herein,
Ni
x
Fe
1–
alloy
nanocones
arrays
(with
≈2
nm
surface
NiO/NiFe(OH)
2
layer)
adopted
boost
reactants.
Finite
element
analysis
suggests
that
high‐curvature
tips
can
enhance
local
electric
field,
which
induces
an
order
magnitude
higher
concentration
hydroxide
ions
(OH
−
)
at
active
sites
and
promotes
intrinsic
activity
by
67%
1.5
V.
Experimental
results
show
a
fabricated
NiFe
nanocone
array
electrode,
with
optimized
composition,
has
small
overpotential
190
mV
10
mA
cm
−2
255
500
.
When
calibrated
area,
electrode
outperforms
state‐of‐the‐art
electrocatalysts.
positive
effect
tip‐enhanced
field
in
promoting
is
also
confirmed
comparing
samples
different
tip
curvature
radii.
It
suggested
this
enhanced
generic
other
catalysts.
Advanced Energy Materials,
Journal Year:
2020,
Volume and Issue:
10(45)
Published: Oct. 2, 2020
Abstract
The
sluggish
oxygen
evolution
reaction
(OER)
is
a
pivotal
process
for
renewable
energy
technologies,
such
as
water
splitting.
discovery
of
efficient,
durable,
and
earth‐abundant
electrocatalysts
oxidation
highly
desirable.
Here,
novel
trimetallic
nitride
compound
grown
on
nickel
foam
(CoVFeN
@
NF)
demonstrated,
which
an
ultra‐highly
active
OER
electrocatalyst
that
outperforms
the
benchmark
catalyst,
RuO
2
,
most
state‐of‐the‐art
3D
transition
metals
their
compounds.
CoVFeN
NF
exhibits
ultralow
overpotentials
212
264
mV
at
10
100
mA
cm
−2
in
1
m
KOH,
respectively,
together
with
small
Tafel
slop
34.8
dec
−1
.
Structural
characterization
reveals
excellent
catalytic
activity
mainly
originates
from:
1)
formation
oxyhydroxide
species
surface
catalyst
due
to
reconstruction
phase
transition,
2)
promoted
possibly
activated
by
peroxo‐like
(O
2−
)
through
combined
lattice‐oxygen‐oxidation
adsorbate
escape
mechanism,
3)
optimized
electronic
structure
local
coordination
environment
owing
synergistic
effect
multimetal
system,
4)
greatly
accelerated
electron
transfer
result
nitridation.
This
study
provides
simple
approach
rationally
design
cost‐efficient
systems
catalysts
electrochemical
devices.
Chemical Reviews,
Journal Year:
2024,
Volume and Issue:
124(7), P. 3694 - 3812
Published: March 22, 2024
Electrocatalytic
water
splitting
driven
by
renewable
electricity
has
been
recognized
as
a
promising
approach
for
green
hydrogen
production.
Different
from
conventional
strategies
in
developing
electrocatalysts
the
two
half-reactions
of
(e.g.,
and
oxygen
evolution
reactions,
HER
OER)
separately,
there
growing
interest
designing
bifunctional
electrocatalysts,
which
are
able
to
catalyze
both
OER.
In
addition,
considering
high
overpotentials
required
OER
while
limited
value
produced
oxygen,
is
another
rapidly
exploring
alternative
oxidation
reactions
replace
hybrid
toward
energy-efficient
generation.
This
Review
begins
with
an
introduction
on
fundamental
aspects
splitting,
followed
thorough
discussion
various
physicochemical
characterization
techniques
that
frequently
employed
probing
active
sites,
emphasis
reconstruction
during
redox
electrolysis.
The
design,
synthesis,
performance
diverse
based
noble
metals,
nonprecious
metal-free
nanocarbons,
overall
acidic
alkaline
electrolytes,
thoroughly
summarized
compared.
Next,
their
application
also
presented,
wherein
anodic
include
sacrificing
agents
oxidation,
pollutants
oxidative
degradation,
organics
upgrading.
Finally,
concise
statement
current
challenges
future
opportunities
presented
hope
guiding
endeavors
quest
sustainable
Advanced Functional Materials,
Journal Year:
2020,
Volume and Issue:
31(9)
Published: Dec. 6, 2020
Abstract
The
reaction
kinetics
of
alkaline
hydrogen
evolution
reactions
(HER)
is
a
trade‐off
between
adsorption
and
desorption
for
intermediate
species
(H
2
O,
OH,
H
ads
).
However,
due
to
the
complicated
correlation
intermediates
energy
electronic
states,
targeted
regulating
at
atomic
level
not
comprehensive.
Herein,
nonmetals
(B,
N,
F)
are
used
modulate
structure
Ni
3
S
4
,
propose
that
O
OH
correlate
directly
with
d‐band
center
(ε
d
)
transition
metal
Ni,
has
linear
dependence
on
p‐band
p
nonmetal
S.
Direct
experimental
evidence
offered
in
all
doping
samples,
Tafel
slope
exchange
current
density
can
be
improved
regularly
ε
F‐Ni
shows
optimum
activity
tiny
overpotential
29
92
mV
harvesting
10
100
mA
cm
−2
respectively.
Furthermore,
micro‐kinetics
analysis
functional
theory
calculations
verify
F‐doping
efficiently
reduce
barrier
Volmer
step,
eventually
accelerating
HER
kinetics.
This
work
provides
atomic‐level
insight
into
structure‐properties
relationship,
opens
an
avenue
kinetic‐oriented
design
beyond.
Angewandte Chemie International Edition,
Journal Year:
2022,
Volume and Issue:
61(30)
Published: April 20, 2022
Transition-metal
alloys
are
currently
drawing
increasing
attention
as
promising
electrocatalysts
for
the
alkaline
hydrogen
evolution
reaction
(HER).
However,
traditional
density-functional-theory-derived
d-band
theory
fails
to
describe
adsorption
energy
(ΔGH
)
on
hollow
sites.
Herein,
by
studying
ΔGH
a
series
of
Ni-M
(M=Ti,
V,
Cr,
Mn,
Fe,
Co,
Cu,
Zn,
Mo,
W)
bimetallic
alloys,
an
improved
center
was
provided
and
potential
NiCu
electrocatalyst
with
near-optimal
discovered.
Moreover,
oxygen
atoms
were
introduced
into
(O-NiM)
balance
adsorption/desorption
hydroxyl
species.
The
tailored
electrocatalytic
sites
water
dissociation
can
synergistically
accelerate
multi-step
HER.
prepared
O-NiCu
shows
optimum
HER
activity
low
overpotential
23
mV
at
10
mA
cm-2
.
This
work
not
only
broadens
applicability
theory,
but
also
provides
crucial
understanding
designing
efficient
electrocatalysts.
Angewandte Chemie International Edition,
Journal Year:
2020,
Volume and Issue:
59(34), P. 14533 - 14540
Published: June 2, 2020
Designing
cost-effective
and
efficient
electrocatalysts
plays
a
pivotal
role
in
advancing
the
development
of
electrochemical
water
splitting
for
hydrogen
generation.
Herein,
multifunctional
active-center-transferable
heterostructured
electrocatalysts,
platinum/lithium
cobalt
oxide
(Pt/LiCoO2
)
composites
with
Pt
nanoparticles
(Pt
NPs)
anchored
on
LiCoO2
nanosheets,
are
designed
towards
highly
splitting.
In
this
electrocatalyst
system,
active
center
can
be
alternatively
switched
between
species
evolution
reaction
(HER)
oxygen
(OER),
respectively.
Specifically,
centers
acts
as
co-catalyst
HER,
whereas
transfers
to
turns
into
OER.
The
unique
architecture
Pt/LiCoO2
heterostructure
provides
abundant
interfaces
favorable
electronic
structure
coordination
environment
optimal
adsorption
behavior
intermediates.
30
%
delivers
low
overpotentials
61
285
mV
achieve
10
mA
cm-2
HER
OER
alkaline
medium,
