Abstract
The
generation
of
green
hydrogen
by
water
splitting
is
identified
as
a
key
strategic
energy
technology,
and
proton
exchange
membrane
electrolysis
(PEMWE)
one
the
desirable
technologies
for
converting
renewable
sources
into
hydrogen.
However,
harsh
anode
environment
PEMWE
oxygen
evolution
reaction
(OER)
involving
four‐electron
transfer
result
in
large
overpotential,
which
limits
overall
efficiency
production,
thus
efficient
electrocatalysts
are
needed
to
overcome
high
overpotential
slow
kinetic
process.
In
recent
years,
noble
metal‐based
(e.g.,
Ru/Ir‐based
metal/oxide
electrocatalysts)
have
received
much
attention
due
their
unique
catalytic
properties,
already
become
dominant
acidic
OER
process
applied
commercial
devices.
these
still
face
thorny
problem
conflicting
performance
cost.
this
review,
first,
metal
briefly
classified
according
forms
existence,
mechanisms
outlined.
Then,
focus
on
summarizing
improvement
strategies
with
respect
activity
stability
over
years.
Finally,
challenges
development
prospects
discussed.
Abstract
The
excessive
dependence
on
fossil
fuels
contributes
to
the
majority
of
CO
2
emissions,
influencing
climate
change.
One
promising
alternative
is
green
hydrogen,
which
can
be
produced
through
water
electrolysis
from
renewable
electricity.
However,
variety
and
complexity
hydrogen
evolution
electrocatalysts
currently
studied
increases
difficulty
in
integration
catalytic
theory,
catalyst
design
preparation,
characterization
methods.
Herein,
this
review
first
highlights
principles
for
reaction
(HER)
electrocatalysts,
presenting
thermodynamics,
kinetics,
related
electronic
structural
descriptors
HER.
Second,
reasonable
design,
mechanistic
understanding,
performance
enhancement
are
deeply
discussed
based
intrinsic
extrinsic
effects.
Third,
recent
advancements
electrocatalytic
splitting
technology
further
briefly.
Finally,
challenges
perspectives
development
highly
efficient
proposed.
Nature Communications,
Год журнала:
2023,
Номер
14(1)
Опубликована: Апрель 4, 2023
Rational
design
efficient
transition
metal-based
electrocatalysts
for
oxygen
evolution
reaction
(OER)
is
critical
water
splitting.
However,
industrial
water-alkali
electrolysis
requires
large
current
densities
at
low
overpotentials,
always
limited
by
intrinsic
activity.
Herein,
we
report
hierarchical
bimetal
nitride/hydroxide
(NiMoN/NiFe
LDH)
array
as
model
catalyst,
regulating
the
electronic
states
and
tracking
relationship
of
structure-activity.
As-activated
NiMoN/NiFe
LDH
exhibits
industrially
required
density
1000
mA
cm-2
overpotential
266
mV
with
250
h
stability
OER.
Especially,
in-situ
electrochemical
spectroscopic
reveals
that
heterointerface
facilitates
dynamic
structure
to
optimize
structure.
Operando
impedance
spectroscopy
implies
accelerated
OER
kinetics
intermediate
due
fast
charge
transport.
The
mechanism
revealed
combination
theoretical
experimental
studies,
indicating
as-activated
follows
lattice
oxidation
kinetics.
This
work
paves
an
avenue
develop
catalysts
via
tuning
states.
ACS Nano,
Год журнала:
2022,
Номер
16(12), С. 19959 - 19979
Опубликована: Дек. 15, 2022
To
utilize
intermittent
renewable
energy
as
well
achieve
the
goals
of
peak
carbon
dioxide
emissions
and
neutrality,
various
electrocatalytic
devices
have
been
developed.
However,
reactions,
e.g.,
hydrogen
evolution
reaction/oxygen
reaction
in
overall
water
splitting,
polysulfide
conversion
lithium–sulfur
batteries,
formation/decomposition
lithium
peroxide
lithium–oxygen
nitrate
reduction
to
degrade
sewage,
suffer
from
sluggish
kinetics
caused
by
multielectron
transfer
processes.
Owing
merits
accelerated
charge
transport,
optimized
adsorption/desorption
intermediates,
raised
conductivity,
regulation
microenvironment,
ease
combine
with
geometric
characteristics,
built-in
electric
field
(BIEF)
is
expected
overcome
above
problems.
Here,
we
give
a
Review
about
very
recent
progress
BIEF
for
efficient
electrocatalysis.
First,
construction
strategies
characterization
methods
(qualitative
quantitative
analysis)
are
summarized.
Then,
up-to-date
overviews
engineering
electrocatalysis,
attention
on
electron
structure
optimization
microenvironment
modulation,
analyzed
discussed
detail.
In
end,
challenges
perspectives
proposed.
This
gives
deep
understanding
design
electrocatalysts
next-generation
storage
devices.
Nature Communications,
Год журнала:
2024,
Номер
15(1)
Опубликована: Фев. 16, 2024
Abstract
Exploring
an
active
and
cost-effective
electrocatalyst
alternative
to
carbon-supported
platinum
nanoparticles
for
alkaline
hydrogen
evolution
reaction
(HER)
have
remained
elusive
date.
Here,
we
report
a
catalyst
based
on
single
atoms
(SAs)
doped
into
the
hetero-interfaced
Ru/RuO
2
support
(referred
as
Pt-Ru/RuO
),
which
features
low
HER
overpotential,
excellent
stability
distinctly
enhanced
cost-based
activity
compared
commercial
Pt/C
Ru/C
in
1
M
KOH.
Advanced
physico-chemical
characterizations
disclose
that
sluggish
water
dissociation
is
accelerated
by
RuO
while
Pt
SAs
metallic
Ru
facilitate
subsequent
H*
combination.
Theoretical
calculations
correlate
with
experimental
findings.
Furthermore,
only
requires
1.90
V
reach
A
cm
−2
delivers
high
price
anion
exchange
membrane
electrolyzer,
outperforming
benchmark
Pt/C.
This
research
offers
feasible
guidance
developing
noble
metal-based
catalysts
performance
cost
toward
practical
H
production.
Abstract
The
hydrogen
energy
generated
by
the
electrocatalytic
water
splitting
reaction
has
been
established
as
a
renewable
and
clean
carrier
with
ultra‐high
density,
which
can
well
make
up
for
shortcomings
of
conventional
sources,
such
geographical
limitations,
climatic
dependence,
wastage.
Notably,
introduction
electrocatalysts
enhance
efficiency
process
to
generate
hydrogen.
Particularly,
heterostructure
constructed
coupling
multiple
components
(or
phases)
have
emerged
most
promising
option
due
well‐known
electronic
synergistic
effects.
existing
reviews
on
interface
engineering
electrocatalyst
design
mostly
focus
relationship
between
heterostructures
specific
reactions.
However,
comprehensive
overview
integration
model
building,
directional
synthesis,
mechanism
rarely
reported.
To
this
end,
in
review,
development
catalysts
is
systematically
introduced
from
perspective
classification,
growth
regulation
performance
based
interfacial
microenvironment
(bonding,
configuration,
lattice
strain,
etc.),
thereby
offering
useful
insights
construction
models.
Besides,
combined
current
applications
strategies,
challenges
future
are
discussed
relevant
solutions
proposed.
Overall,
review
serve
theoretical
reference
mechanism,
further
promote
production
technologies
low
consumption
high
yield.
image
Advanced Materials,
Год журнала:
2022,
Номер
35(1)
Опубликована: Окт. 7, 2022
Designing
and
synthesizing
highly
efficient
stable
electrocatalysts
for
hydrogen
evolution
reaction
(HER)
is
important
realizing
the
economy.
Tuning
electronic
structure
of
essential
to
achieve
optimal
HER
activity,
interfacial
engineering
an
effective
strategy
induce
electron
transfer
in
a
heterostructure
interface
optimize
kinetics.
In
this
study,
ultrafine
RhP2
/Rh
nanoparticles
are
synthesized
with
well-defined
semiconductor-metal
heterointerface
embedded
N,P
co-doped
graphene
(RhP2
/Rh@NPG)
via
one-step
pyrolysis.
/Rh@NPG
exhibits
outstanding
performances
under
all
pH
conditions.
Electrochemical
characterization
first
principles
density
functional
theory
calculations
reveal
that
induces
from
metallic
Rh
semiconductive
,
which
increases
on
atoms
weakens
adsorption
thereby
accelerating
Moreover,
activates
dual-site
synergistic
effect
P
neutral
alkaline
environments,
promoting
reorganization
water
molecules
faster
Advanced Energy Materials,
Год журнала:
2023,
Номер
13(11)
Опубликована: Янв. 29, 2023
Abstract
Recent
years
have
witnessed
an
upsurge
of
interest
in
exploiting
advanced
photo‐/electrocatalysts
for
efficient
energy
conversion
and
environmental
remediation.
Constructing
internal
electric
fields
has
been
highlighted
as
a
rising
star
to
help
facilitate
various
catalytic
processes,
with
the
merits
promoting
charge
transfer/separation,
optimizing
redox
potential
creating
effective
active/adsorption
sites.
Internal
are
usually
formed
by
polarization
uneven
distributions
between
different
constituent
layers,
which
widely
exist
piezoelectrics,
polar
surface
terminations,
heterostructure
materials.
Herein,
groundbreaking
interdisciplinary
overview
latest
advances
construction
improve
photo(electro)catalytic
electrocatalytic
activity
is
provided.
This
critical
review
begins
encyclopedic
summary
classification,
advantages,
synthesis
strategies
fields.
Subsequently,
identification
methods
thoroughly
discussed
based
on
characterization
techniques,
experiments,
theoretical
calculations,
can
provide
profound
guidance
in‐depth
study
To
elaborate
theory–structure–activity
relationships
fields,
corresponding
reaction
mechanisms,
modification
strategies,
performance
jointly
discussed,
along
discussion
their
practical
applications.
Finally,
insightful
analysis
challenges
future
prospects
field‐based
catalysts
discussed.
