Advanced Materials,
Год журнала:
2021,
Номер
33(31)
Опубликована: Июнь 24, 2021
Abstract
Water
oxidation,
or
the
oxygen
evolution
reaction
(OER),
which
combines
two
atoms
from
water
molecules
and
releases
one
molecule,
plays
key
role
by
providing
protons
electrons
needed
for
hydrogen
generation,
electrochemical
carbon
dioxide
reduction,
nitrogen
fixation.
The
multielectron
transfer
OER
process
involves
multiple
intermediates,
a
high
overpotential
is
to
overcome
sluggish
kinetics.
Among
different
splitting
devices,
proton
exchange
membrane
(PEM)
electrolyzer
offers
greater
advantages.
However,
current
anode
electrocatalysts
in
PEM
electrolyzers
are
limited
precious
iridium
ruthenium
oxides.
Developing
highly
active,
stable,
precious‐metal‐free
oxidation
acidic
media
attractive
large‐scale
application
of
electrolyzers.
In
recent
years,
various
types
catalysts
such
as
carbon‐based
materials,
earth‐abundant
transition
metal
oxides,
oxide
mixtures
have
been
investigated
some
them
show
promising
activity
stability
OER.
this
review,
thermodynamics
Pourbaix
diagram
elements
aqueous
solution,
theoretical
screening
prediction
first
elaborated.
catalytic
performance,
kinetics,
mechanisms
together
with
future
research
directions
regarding
summarized
discussed.
Advanced Functional Materials,
Год журнала:
2020,
Номер
30(15)
Опубликована: Фев. 16, 2020
The
development
of
low-cost,
high-efficiency,
and
robust
electrocatalysts
for
the
oxygen
evolution
reaction
(OER)
is
urgently
needed
to
address
energy
crisis.
In
recent
years,
non-noble-metal-based
OER
have
attracted
tremendous
research
attention.
Beginning
with
introduction
some
evaluation
criteria
OER,
current
are
reviewed,
classification
metals/alloys,
oxides,
hydroxides,
chalcogenides,
phosphides,
phosphates/borates,
other
compounds,
along
their
advantages
shortcomings.
knowledge
mechanisms
practical
applications
also
summarized
developing
more
efficient
electrocatalysts.
Finally,
states,
challenges,
perspectives
discussed.
Abstract
Oxygen
evolution
reaction
(OER)
is
an
important
half‐reaction
involved
in
many
electrochemical
applications,
such
as
water
splitting
and
rechargeable
metal–air
batteries.
However,
the
sluggish
kinetics
of
its
four‐electron
transfer
process
becomes
a
bottleneck
to
performance
enhancement.
Thus,
rational
design
electrocatalysts
for
OER
based
on
thorough
understanding
mechanisms
structure‐activity
relationship
vital
significance.
This
review
begins
with
introduction
which
include
conventional
adsorbate
mechanism
lattice‐oxygen‐mediated
mechanism.
The
pathways
related
intermediates
are
discussed
detail,
several
descriptors
greatly
assist
catalyst
screen
optimization
summarized.
Some
parameters
suggested
measurement
criteria
also
mentioned
discussed.
Then,
recent
developments
breakthroughs
experimental
achievements
transition
metal‐based
reviewed
reveal
novel
principles.
Finally,
some
perspectives
future
directions
proposed
further
catalytic
enhancement
deeper
design.
It
believed
that
iterative
improvements
fundamental
principles
essential
realize
applications
efficient
energy
storage
conversion
technologies.
Advanced Materials,
Год журнала:
2020,
Номер
33(6)
Опубликована: Июнь 24, 2020
Hydrogen
has
been
deemed
as
an
ideal
substitute
fuel
to
fossil
energy
because
of
its
renewability
and
the
highest
density
among
all
chemical
fuels.
One
most
economical,
ecofriendly,
high-performance
ways
hydrogen
production
is
electrochemical
water
splitting.
Recently,
2D
transition
metal
dichalcogenides
(also
known
TMDs)
showed
their
utilization
potentiality
cost-effective
evolution
reaction
(HER)
catalysts
in
electrolysis.
Herein,
recent
representative
research
efforts
systematic
progress
made
TMDs
are
reviewed,
future
opportunities
challenges
discussed.
Furthermore,
general
methods
synthesizing
materials
introduced
detail
advantages
disadvantages
for
some
specific
provided.
This
explanation
includes
several
important
regulation
strategies
creating
more
active
sites,
heteroatoms
doping,
phase
engineering,
construction
heterostructures,
synergistic
modulation
which
capable
optimizing
electrical
conductivity,
exposure
catalytic
barrier
electrode
material
boost
HER
kinetics.
In
last
section,
current
obstacles
chances
development
electrocatalysts
proposed
provide
insight
into
valuable
guidelines
fabricating
effective
electrocatalysts.
Nature Communications,
Год журнала:
2022,
Номер
13(1)
Опубликована: Май 13, 2022
Abstract
High-entropy
alloys
have
received
considerable
attention
in
the
field
of
catalysis
due
to
their
exceptional
properties.
However,
few
studies
hitherto
focus
on
origin
outstanding
performance
and
accurate
identification
active
centers.
Herein,
we
report
a
conceptual
experimental
approach
overcome
limitations
single-element
catalysts
by
designing
FeCoNiXRu
(X:
Cu,
Cr,
Mn)
system
with
various
sites
that
different
adsorption
capacities
for
multiple
intermediates.
The
electronegativity
differences
between
mixed
elements
HEA
induce
significant
charge
redistribution
create
highly
Co
Ru
optimized
energy
barriers
simultaneously
stabilizing
OH
*
H
intermediates,
which
greatly
enhances
efficiency
water
dissociation
alkaline
conditions.
This
work
provides
an
in-depth
understanding
interactions
specific
opens
up
fascinating
direction
breaking
scaling
relation
issues
multistep
reactions.
Chemical Reviews,
Год журнала:
2021,
Номер
121(21), С. 13174 - 13212
Опубликована: Сен. 15, 2021
Electrochemical
water
splitting
for
hydrogen
generation
is
a
promising
pathway
renewable
energy
conversion
and
storage.
One
of
the
most
important
issues
efficient
to
develop
cost-effective
highly
electrocatalysts
drive
sluggish
oxygen-evolution
reaction
(OER)
at
anode
side.
Notably,
structural
transformation
such
as
surface
oxidation
metals
or
metal
nonoxide
compounds
amorphization
some
oxides
during
OER
have
attracted
growing
attention
in
recent
years.
The
investigation
will
contribute
in-depth
understanding
accurate
catalytic
mechanisms
finally
benefit
rational
design
materials
with
high
activity.
In
this
Review,
we
provide
an
overview
heterogeneous
obvious
electrocatalysis.
To
gain
insight
into
essence
transformation,
summarize
driving
forces
critical
factors
that
affect
process.
addition,
advanced
techniques
are
used
probe
chemical
states
atomic
structures
transformed
surfaces
also
introduced.
We
then
discuss
structure
active
species
relationship
between
performance
properties
materials.
Finally,
challenges
prospects
electrocatalysis
presented.
