Deleted Journal,
Journal Year:
2023,
Volume and Issue:
2, P. e9120082 - e9120082
Published: May 31, 2023
The
electrochemical
oxygen
reduction
reaction
(ORR)
is
pivotal
in
energy
conversion
via
a
4e−
ORR
pathway
and
green
hydrogen
peroxide
production
2e−
pathway.
Transition
metal
single
atom
catalysts
(TM
SACs)
have
attracted
intense
attention
recent
years
for
due
to
their
high
activity
near
maximum
utilization.
future
development
of
TM
SACs
requires
improved
understanding
pathways,
since
currently
the
true
origin
remains
contentious
owing
lack
qualitative/quantitative
information
about
active
sites.
Knowledge-guided
design
imperative
optimization
performance
terms
selectivity.
This
review
focuses
on
latest
progress
ORR,
placing
particular
efforts
elucidate
mechanisms.
Experimental
evidence
based
in-situ/operando
characterization
measurements,
along
with
theoretical
predictions,
are
summarized
deepen
structure-performance
relationships
at
both
atomic
molecular
level.
Finally,
some
perspectives
offered
relating
fundamental
science
needed
find
practical
application
storage
devices.
We
hope
this
will
inspire
new
synthetic
routes
towards
high-performance
electrocatalysts
sector.
Advanced Energy Materials,
Journal Year:
2024,
Volume and Issue:
14(14)
Published: Jan. 24, 2024
Abstract
Incorporating
atom‐nanocluster
interactions
into
Fe─N─C
single‐atom
catalysts
(Fe‐SACs)
represents
a
viable
strategy
for
enhancing
their
oxygen
reduction
reaction
(ORR)
activity,
however,
further
investigation
is
necessary
to
elucidate
the
underlying
mechanism.
Herein,
Cu
nanoclusters
are
incorporated
Fe‐SACs
realize
markedly
enhanced
pH‐universal
ORR
performance
and
investigate
The
rate‐determining
step
(RDS)
reveals
that
existence
of
does
not
alter
RDS
despite
differences
in
acidic,
neutral,
or
alkaline
media
but
instead
optimizes
electronic
configuration
significantly
promotes
RDS.
synergistic
effect
between
Fe
single
atoms
enhances
half‐wave
potential
by
45,
90,
18
mV
HClO
4
,
PBS,
KOH
electrolytes,
respectively.
demonstrate
remarkable
maximum
power
densities
971.4,
94.9,
234.7
mW
cm
−2
H
2
/O
fuel
cells,
neutral
Zn‐air
batteries,
ACS Nano,
Journal Year:
2024,
Volume and Issue:
18(5), P. 4089 - 4103
Published: Jan. 25, 2024
To
meet
the
requirements
of
biomedical
applications
in
antibacterial
realm,
it
is
great
importance
to
explore
nano-antibiotics
for
wound
disinfection
that
can
prevent
development
drug
resistance
and
possess
outstanding
biocompatibility.
Therefore,
we
attempted
synthesize
an
atomically
dispersed
ion
(Fe)
on
phenolic
carbon
quantum
dots
(CQDs)
combined
with
organic
photothermal
agent
(PTA)
(Fe@SAC
CQDs/PTA)
via
a
hydrothermal/ultrasound
method.
Fe@SAC
CQDs
adequately
exerted
peroxidase-like
activity
while
PTA
presented
excellent
conversion
capability,
which
provided
enormous
potential
applications.
Based
our
work,
CQDs/PTA
exhibited
eradication
Escherichia
coli
(>99%
inactivation
efficiency)
Staphylococcus
aureus
based
synergistic
chemodynamic
therapy
(CDT)
(PTT).
Moreover,
vitro
experiments
demonstrated
could
inhibit
microbial
growth
promote
bacterial
biofilm
destruction.
In
vivo
suggested
CQDs/PTA-mediated
CDT
PTT
promotion
recovery
effects.
This
work
indicated
serve
as
broad-spectrum
antimicrobial
nano-antibiotic,
was
simultaneously
beneficial
eradication,
disinfection,
healing.
Nano-Micro Letters,
Journal Year:
2024,
Volume and Issue:
16(1)
Published: July 9, 2024
Combining
single
atoms
with
clusters
or
nanoparticles
is
an
emerging
tactic
to
design
efficient
electrocatalysts.
Both
synergy
effect
and
high
atomic
utilization
of
active
sites
in
the
composite
catalysts
result
enhanced
electrocatalytic
performance,
simultaneously
provide
a
radical
analysis
interrelationship
between
structure
activity.
In
this
review,
recent
advances
single-atomic
site
coupled
are
emphasized.
Firstly,
synthetic
strategies,
characterization,
dynamics
types
clusters/nanoparticles
introduced,
then
key
factors
controlling
discussed.
Next,
several
clean
energy
catalytic
reactions
performed
over
synergistic
illustrated.
Eventually,
encountering
challenges
recommendations
for
future
advancement
energy-transformation
electrocatalysis
outlined.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(32)
Published: April 25, 2024
Abstract
Transition
metal‐nitrogen‐carbon
single‐atom
catalysts
(M─N─C
SACs)
exhibit
outstanding
catalytic
activity
for
the
oxygen
reduction
reaction
(ORR).
However,
these
still
face
dual
challenges
of
low
density
and
utilization
active
sites
in
practical
applications.
Hence,
a
simultaneous
modulation
strategy
to
construct
high‐density
accessible
Co‐N
4
on
nitrogen‐doped
porous
carbon
(Co
H
SA/NC),
is
reported.
As
expected,
optimized
Co
SA/NC
catalyst
exhibits
superior
ORR
with
half‐wave
potential
value
0.874
V,
outperforming
that
benchmark
Pt/C
catalyst.
Importantly,
mass
turnover
frequency
are
14.7
13.3
times
higher
than
low‐density
single
atom
L
respectively.
Structural
characterization
functional
theory
(DFT)
reveal
structure
high
dense
synergistically
improve
performance,
which
induced
redistribution
d
orbital,
resulting
z
2
orbital
has
enough
electron
interact
OOH
*
specie,
thereby
facilitating
kinetic
process
ORR.
Moreover,
SA/NC‐based
Zn–Air
Battery
(ZAB)
also
showed
excellent
device
including
high‐power
(191.7
mW
cm
−2
),
specific
capacity,
stability
(250
h),
significantly
Pt/C‐based
ZABs.
Carbon Energy,
Journal Year:
2024,
Volume and Issue:
6(4)
Published: Feb. 5, 2024
Abstract
Graphitic
carbon
nitride
(g‐C
3
N
4
)
is
a
highly
recognized
two‐dimensional
semiconductor
material
known
for
its
exceptional
chemical
and
physical
stability,
environmental
friendliness,
pollution‐free
advantages.
These
remarkable
properties
have
sparked
extensive
research
in
the
field
of
energy
storage.
This
review
paper
presents
latest
advances
utilization
g‐C
various
storage
technologies,
including
lithium‐ion
batteries,
lithium‐sulfur
sodium‐ion
potassium‐ion
supercapacitors.
One
key
strengths
lies
simple
preparation
process
along
with
ease
optimizing
structure.
It
possesses
abundant
amino
Lewis
basic
groups,
as
well
high
density
nitrogen,
enabling
efficient
charge
transfer
electrolyte
solution
penetration.
Moreover,
graphite‐like
layered
structure
presence
large
π
bonds
contribute
to
versatility
preparing
multifunctional
materials
different
dimensions,
element
group
doping,
conjugated
systems.
characteristics
open
up
possibilities
expanding
application
devices.
article
comprehensively
reviews
progress
on
highlights
potential
future
applications
this
field.
By
exploring
advantages
unique
features
,
provides
valuable
insights
into
harnessing
full
applications.
Small Methods,
Journal Year:
2023,
Volume and Issue:
7(7)
Published: April 8, 2023
Abstract
Alkaline
oxygen
reduction
reaction
(ORR)
is
critical
to
electrochemical
energy
conversion
technology,
yet
the
rational
breaking
of
thermodynamic
inhibition
for
ORR
through
spin
regulation
remains
a
challenge.
Herein,
Mott–Schottky
catalyst
consisting
Er
2
O
3
‐Co
particles
uniformly
implanted
into
carbon
nanofibers
(Er
‐Co/CNF)
designed
enhancing
via
spin‐selective
coupling.
The
optimized
‐Co/CNF
affords
high
half‐wave
potential
(0.835
V
vs
reversible
hydrogen
electrode,
RHE)
and
onset
(0.989
RHE
)
surpassing
individual
Co/CNF
/CNF.
Theoretical
calculations
reveal
introduction
optimizes
electronic
structure
Co
Er(4f)‐O(2p)‐Co(3d)
gradient
orbital
coupling,
resulting
in
significantly
enhanced
performance.
Through
induced
spin‐up
hole
3d
states
endows
Er‐O‐Co
unit
active
site
with
coupling
channel
electron
transition.
This
favors
decrease
gap
potential‐limiting
step,
thus
achieving
theoretical
limiting
0.77
‐Co.
Moreover,
practicability
as
an
air‐cathode
also
demonstrated
Zn‐air
batteries.
work
believed
provide,
new
perspectives
design
efficient
electrocatalysts
by
engineering
rare‐earth
oxides.
