Advanced Functional Materials,
Journal Year:
2021,
Volume and Issue:
31(45)
Published: Aug. 7, 2021
Abstract
Oxygen
reduction
reaction
(ORR)
is
an
essential
process
for
sustainable
energy
supply
and
sufficient
chemical
production
in
modern
society.
Single‐atom
catalysts
(SACs)
exhibit
great
potential
on
maximum
atomic
efficiency,
high
ORR
activity,
stability,
making
them
attractive
candidates
pursuing
next‐generation
catalysts.
Despite
substantial
efforts
being
made
building
diversiform
single‐atom
active
sites
(SAASs),
the
performance
of
obtained
still
unsatisfactory.
Fortunately,
microenvironment
regulation
SACs
provides
opportunities
to
improve
activity
selectivity
ORR.
In
this
review,
first,
mechanism
pathways
N‐coordinated
SAAS,
electrochemical
evaluation,
characterization
SAAS
are
displayed.
addition,
recent
developments
tuning
systematically
summarized,
especially,
strategies
modulation
introduced
detail
boosting
intrinsic
4e
−
/2e
selectivity.
Theoretical
calculations
cutting‐edge
techniques
united
discussed
fundamental
understanding
synthesis–construction–performance
correlations.
Furthermore,
their
comprehensively
overviewed
acquire
outstanding
SACs.
Lastly,
by
proposing
perspectives
remaining
challenges
infant
engineering,
future
directions
other
analogous
procedures
pointed
out.
Advanced Energy Materials,
Journal Year:
2022,
Volume and Issue:
12(9)
Published: Jan. 18, 2022
Abstract
In
recent
years,
dual‐atom
catalysts
(DACs)
have
attracted
extensive
attention,
as
an
extension
of
single‐atom
(SACs).
Compared
with
SACs,
DACs
higher
metal
loading
and
more
complex
flexible
active
sites,
thus
achieving
better
catalytic
performance
providing
opportunities
for
electrocatalysis.
This
review
introduces
the
research
progress
in
years
on
how
to
design
new
enhance
Firstly,
advantages
increasing
are
introduced.
Then,
role
changing
adsorption
condition
reactant
molecules
atoms
is
discussed.
Moreover,
ways
which
can
reduce
reaction
energy
barrier
key
steps
change
path
explored.
Catalytic
applications
different
electrocatalytic
reactions,
including
carbon
dioxide
reduction
reaction,
oxygen
evolution
hydrogen
nitrogen
followed.
Finally,
a
brief
summary
made
challenges
prospects
Advanced Science,
Journal Year:
2022,
Volume and Issue:
9(18)
Published: April 18, 2022
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.
Science Advances,
Journal Year:
2022,
Volume and Issue:
8(17)
Published: April 29, 2022
Single-atom
catalysts
(SACs)
include
a
promising
family
of
electrocatalysts
with
unique
geometric
structures.
Beyond
conventional
ones
fully
isolated
metal
sites,
an
emerging
class
the
adjacent
single
atoms
exhibiting
intersite
metal-metal
interactions
appear
in
recent
years
and
can
be
denoted
as
correlated
SACs
(C-SACs).
This
type
provides
more
opportunities
to
achieve
substantial
structural
modification
performance
enhancement
toward
wider
range
electrocatalytic
applications.
On
basis
clear
identification
interactions,
this
review
critically
examines
research
progress
C-SACs.
It
shows
that
control
enables
regulation
atomic
structure,
local
coordination,
electronic
properties
atoms,
which
facilitate
modulation
behavior
Last,
we
outline
directions
for
future
work
design
development
C-SACs,
is
indispensable
creating
high-performing
new
SAC
architectures.
Angewandte Chemie International Edition,
Journal Year:
2022,
Volume and Issue:
61(32)
Published: May 31, 2022
Abstract
Manipulating
the
coordination
environment
of
active
center
via
anion
modulation
to
reveal
tailored
activity
and
selectivity
has
been
widely
achieved,
especially
for
carbon‐based
single‐atom
site
catalysts
(SACs).
However,
tuning
ligand
fields
by
single‐site
metal
cation
regulation
identifying
effects
on
resulting
electronic
configuration
is
seldom
explored.
Herein,
we
propose
a
Ru
strategy
engineer
properties
constructing
Ru/LiCoO
2
SAC
with
atomically
dispersed
Ru−Co
pair
sites.
Benefitting
from
strong
coupling
between
Co
sites,
catalyst
possesses
an
enhanced
electrical
conductivity
achieves
near‐optimal
oxygen
adsorption
energies.
Therefore,
optimized
delivers
superior
evolution
reaction
(OER)
low
overpotential,
high
mass
1000
A
g
oxide
−1
at
small
overpotential
335
mV,
excellent
long‐term
stability.
It
also
exhibits
rapid
kinetics
rate
capability
outstanding
durability
in
zinc–air
battery.
Journal of the American Chemical Society,
Journal Year:
2023,
Volume and Issue:
145(43), P. 23659 - 23669
Published: Oct. 23, 2023
Designing
stable
single-atom
electrocatalysts
with
lower
energy
barriers
is
urgent
for
the
acidic
oxygen
evolution
reaction.
In
particular,
atomic
catalysts
are
highly
dependent
on
kinetically
sluggish
acid-base
mechanism,
limiting
reaction
paths
of
intermediates.
Herein,
we
successfully
manipulate
steric
localization
Ru
single
atoms
at
Co3O4
surface
to
improve
by
precise
control
anchor
sites.
The
delicate
structure
design
can
switch
mechanism
from
lattice
(LOM)
optimized
adsorbate
(AEM).
embedded
into
cation
vacancies
reveal
an
that
activates
proton
donor-acceptor
function
(PDAM),
demonstrating
a
new
catalytic
pathway
circumvent
classic
scaling
relationship.
Steric
interactions
intermediates
anchored
Ru-O-Co
interface
played
primary
role
in
optimizing
intermediates'
conformation
and
reducing
barrier.
As
comparison,
confined
sites
exhibit
process.
result,
atom
spatial
position
presents
100-fold
increase
mass
activity
36.96
A
gRu(ads)-1
4012.11
gRu(anc)-1
1.50
V.
These
findings
offer
insights
behavior.
