Advanced Functional Materials,
Год журнала:
2022,
Номер
33(4)
Опубликована: Ноя. 30, 2022
Abstract
Designing
high‐performance
and
cost‐effective
electrocatalysts
for
water
splitting
at
high
current
density
is
pivotal
practical
industrial
applications.
Herein,
it
found
that
atomic‐level
surface
engineering
of
self‐supported
nickel
phosphide
(NiP)
nanoarrays
via
a
facile
cation‐exchange
method
can
substantially
regulate
the
chemical
physical
properties
catalysts
by
introducing
Co
atoms.
Such
surface‐engineered
Ni
x
1–x
P
endows
several
aspects
merits:
i)
rough
nanosheet
array
electrode
structure
accessible
to
diffusion
electrolytes
release
gas
bubbles,
ii)
enriched
vacancies
companied
doping
thus
increased
active
sites,
iii)
synergy
5
4
NiP
2
beneficial
catalytic
activity
enhancement.
By
virtue
finely
controlling
contents,
optimal
0.96
0.04
achieves
remarkable
bifunctional
electrocatalytic
performance
overall
large
1000
mA
cm
−2
,
showing
overpotentials
249.7
mV
hydrogen
evolution
reaction
281.7
oxygen
reaction.
Furthermore,
500
exhibits
an
ultralow
potential
(1.71
V)
ultralong
durability
(500
h)
splitting.
This
study
implies
materials
offers
viable
route
gaining
density.
Advanced Materials,
Год журнала:
2023,
Номер
35(39)
Опубликована: Янв. 14, 2023
Abstract
The
energy
efficiency
of
metal–air
batteries
and
water‐splitting
techniques
is
severely
constrained
by
multiple
electronic
transfers
in
the
heterogenous
oxygen
evolution
reaction
(OER),
high
overpotential
induced
sluggish
kinetics
has
become
an
uppermost
scientific
challenge.
Numerous
attempts
are
devoted
to
enabling
activity,
selectivity,
stability
via
tailoring
surface
physicochemical
properties
nanocatalysts.
Lattice‐strain
engineering
as
a
cutting‐edge
method
for
tuning
geometric
configuration
metal
sites
plays
pivotal
role
regulating
interaction
catalytic
surfaces
with
adsorbate
molecules.
By
defining
d‐band
center
descriptor
structure–activity
relationship,
individual
contribution
strain
effects
within
state‐of‐the‐art
electrocatalysts
can
be
systematically
elucidated
OER
optimization
mechanism.
In
this
review,
fundamentals
advancements
strain‐catalysts
showcased
innovative
trigger
strategies
enumerated,
particular
emphasis
on
feedback
mechanism
between
precise
regulation
lattice‐strain
optimal
activity.
Subsequently,
modulation
various
attributes
categorized
impediments
encountered
practicalization
strained
effect
discussed,
ending
outlook
future
research
directions
burgeoning
field.
Energy & Environmental Science,
Год журнала:
2023,
Номер
16(4), С. 1685 - 1696
Опубликована: Янв. 1, 2023
In
this
work,
we
propose
a
unique
reaction
mechanism
that
the
Fe
site
OOH
serves
as
auxiliary
to
accelerate
formation
of
Co
active
species,
hence
accelerating
rate-determining
step
OER.
Advanced Materials,
Год журнала:
2022,
Номер
34(41)
Опубликована: Авг. 21, 2022
Platinum-based
catalysts
occupy
a
pivotal
position
in
diverse
catalytic
applications
hydrogen
chemistry
and
electrochemistry,
for
instance,
the
evolution
reactions
(HER).
While
adsorbed
Pt
atoms
on
supports
often
cause
severe
mismatching
electronic
structures
HER
behaviors
from
metallic
due
to
different
energy
level
distribution
of
electron
orbitals.
Here,
design
crystalline
lattice-confined
atomic
metal
carbides
using
Pt-centered
polyoxometalate
frameworks
with
strong
PtO-metal
covalent
bonds
is
reported.
Remarkably,
tungsten
(Ptdoped
@WCx
,
both
W
have
radii
1.3
Å)
exhibit
near-zero
valence
states
similar
as
Pt,
thus
delivering
matched
distributions
5dz
2
H
1s
orbitals
acidic
behaviors.
In
alkaline
conditions,
Ptdoped
exhibits
40
times
greater
mass
activity
(49.5
A
mgPt-1
at
η
=
150
mV)
than
Pt@C
because
favorable
water
dissociation
H*
transport.
These
findings
offer
universal
pathway
construct
urgently
needed
atomic-scale
broad
reactions.
Energy Technology,
Год журнала:
2022,
Номер
10(11)
Опубликована: Сен. 8, 2022
Green
hydrogen
production
by
renewables‐powered
water
electrolysis
holds
the
key
to
energy
sustainability
and
a
carbon‐neutral
future.
The
sluggish
kinetics
of
water‐splitting
reactions,
namely,
evolution
reaction
(HER)
oxygen
(OER),
however,
remains
bottleneck
technology.
High‐entropy
materials,
due
their
compositional
flexibility,
structural
stability,
synergy
between
various
elemental
components,
have
recently
aroused
considerable
interest
in
catalyzing
reactions.
Herein,
timely
review
recent
achievements
is
provided
high‐entropy
materials
for
electrolysis.
An
overview
different
kinds
HER
OER
half‐reactions
introduced,
followed
discussion
theoretical
experimental
efforts
understanding
fundamental
origins
enhanced
catalytic
performance
observed
on
catalysts.
Various
design
strategies,
including
control
size
shape,
construction
porous
structure,
engineering
defect,
formation
hybrid/composite
develop
catalysts
with
improved
are
highlighted.
Finally,
remaining
challenges
pointed
out
corresponding
perspectives
address
these
put
forward
promote
development
research
field
Hydrogen
production
via
electrochemical
water
splitting
is
one
of
the
most
green
and
promising
ways
to
produce
clean
energy
address
resource
crisis,
but
still
suffers
from
low
efficiency
high
cost
mainly
due
sluggish
oxygen
evolution
reaction
(OER)
process.
Alternatively,
hydrogen-evolution
coupled
with
alternative
oxidation
(EHCO)
has
been
proposed
as
a
considerable
strategy
improve
hydrogen
combined
value-added
chemicals.
Although
these
merits,
high-efficient
electrocatalysts
are
always
needed
in
practical
operation.
Typically,
layered
double
hydroxides
(LDHs)
have
developed
large
class
advanced
toward
both
OER
EHCO
stability.
In
this
review,
we
summarized
latest
progress
perspectives
designing
efficient
LDHs-based
for
EHCO.
Particularly,
influence
structure
design
component
regulation
on
their
electrocatalytic
process
discussed
detail.
Finally,
look
forward
challenges
field
organic
oxidation,
such
mechanism,
selected
well
system
design,
hoping
provide
certain
inspiration
development
low-cost
technology.
SusMat,
Год журнала:
2021,
Номер
1(4), С. 460 - 481
Опубликована: Дек. 1, 2021
Abstract
Proton
exchange
membrane
(PEM)
water
electrolysis
represents
one
of
the
most
promising
technologies
to
achieve
green
hydrogen
production,
but
currently
its
practical
viability
is
largely
affected
by
slow
reaction
kinetics
anodic
oxygen
evolution
(OER)
in
an
acidic
environment.
While
noble
metal‐based
catalysts
containing
iridium
or
ruthenium
are
excellent
for
OER,
their
use
PEM
electrolyzers
hindered
due
low
abundance
and
high
cost.
Most
recently,
metal–organic
frameworks
(MOFs)
have
been
demonstrated
as
a
perfect
platform
facilitate
design
OER
with
both
efficiency
cost‐effectiveness.
Here,
we
provide
timely
comprehensive
overview
recent
progress
on
MOF‐based
catalysts.
The
fundamental
mechanisms
first
introduced,
followed
summary
development
pristine
MOFs
MOF
derivatives
Importantly,
number
catalyst
strategies
discussed
aiming
at
improving
catalytic
performance
candidates.
integration
into
real
also
included.
Finally,
future
research
directions
provided
better
operational
environments
devices.
ACS Nano,
Год журнала:
2023,
Номер
17(2), С. 1701 - 1712
Опубликована: Янв. 9, 2023
The
scalable
production
of
inexpensive,
efficient,
and
robust
catalysts
for
oxygen
evolution
reaction
(OER)
that
can
deliver
high
current
densities
at
low
potentials
is
critical
the
industrial
implementation
water
splitting
technology.
Herein,
a
series
metal
oxides
coupled
with
Fe
Angewandte Chemie International Edition,
Год журнала:
2023,
Номер
62(40)
Опубликована: Авг. 15, 2023
Abstract
Heteroatom
doping
has
emerged
as
a
highly
effective
strategy
to
enhance
the
activity
of
metal‐based
electrocatalysts
toward
oxygen
evolution
reaction
(OER).
It
is
widely
accepted
that
does
not
switch
OER
mechanism
from
adsorbate
(AEM)
lattice‐oxygen‐mediated
(LOM),
and
enhanced
attributed
optimized
binding
energies
intermediates.
However,
this
seems
inconsistent
with
fact
overpotential
doped
(<300
mV)
considerably
smaller
than
limit
AEM
(>370
mV).
To
determine
origin
inconsistency,
we
select
phosphorus
(P)‐doped
nickel‐iron
mixed
oxides
model
observe
enhances
covalency
metal‐oxygen
bonds
drive
pathway
transition
LOM,
thereby
breaking
adsorption
linear
relation
between
*OH
*OOH
in
AEM.
Consequently,
obtained
P‐doped
display
small
237
mV
at
10
mA
cm
−2
.
Beyond
P,
similar
also
observed
on
sulfur
doping.
These
findings
offer
new
insights
into
substantially
originating
heteroatom
