Advanced Materials,
Journal Year:
2023,
Volume and Issue:
35(42)
Published: May 18, 2023
Atomically
dispersed
transition
metal-nitrogen/carbon
(M-N/C)
catalysts
have
emerged
as
the
most
promising
substitutes
to
precious
platinum
counterparts
toward
oxygen
reduction
reaction
(ORR).
However,
reported
M-N/C
are
usually
in
form
of
common
M-N4
moieties
with
only
a
single
metal
active
site,
and
they
suffer
from
insufficient
activity.
Herein,
an
unusual
trinuclear
structure
is
elaborately
developed
nitrogen-coordinated
Mn
atom
adjacent
two
Co
atoms
(Co2
MnN8
)
anchored
N-doped
carbon
highly
efficient
ORR
catalyst
via
adsorption-pyrolysis
bimetallic
zeolitic
imidazolate
framework
precursor.
Atomic
structural
investigations
density
functional
theory
(DFT)
calculations
reveal
that
Co2
would
experience
spontaneous
OH
binding
-2OH
real
leading
electron-filled
state
dz2${\mathrm{d}}_{{z}^{2}}$
orbital
optimized
energy
intermediates.
Accordingly,
as-developed
/C
exhibits
unprecedented
activity
high
half-wave
potential
0.912
V
outstanding
stability,
not
surpassing
Pt/C
but
also
representing
new
record
for
Co-based
catalyst.
Chemical Society Reviews,
Journal Year:
2023,
Volume and Issue:
52(17), P. 6139 - 6190
Published: Jan. 1, 2023
Sustainable
zinc-air
batteries
(ZABs)
are
considered
promising
energy
storage
devices
owing
to
their
inherent
safety,
high
density,
wide
operating
temperature
window,
environmental
friendliness,
etc.,
showing
great
prospect
for
future
large-scale
applications.
Thus,
tremendous
efforts
have
been
devoted
addressing
the
critical
challenges
associated
with
sustainable
ZABs,
aiming
significantly
improve
efficiency
and
prolong
operation
lifespan.
The
growing
interest
in
ZABs
requires
in-depth
research
on
oxygen
electrocatalysts,
electrolytes,
Zn
anodes,
which
not
systematically
reviewed
date.
In
this
review,
fundamentals
of
electrocatalysts
air
cathodes,
physicochemical
properties
ZAB
issues
strategies
stabilization
anodes
summarized
from
perspective
fundamental
characteristics
design
principles.
Meanwhile,
significant
advances
situ/operando
characterization
highlighted
provide
insights
into
reaction
mechanism
dynamic
evolution
electrolyte|electrode
interface.
Finally,
several
thoughts
perspectives
provided
regarding
opportunities
ZABs.
Therefore,
review
provides
a
thorough
understanding
advanced
chemistry,
hoping
that
timely
comprehensive
can
shed
light
upcoming
horizons
prosperous
area.
Advanced Materials,
Journal Year:
2022,
Volume and Issue:
35(9)
Published: Dec. 19, 2022
Abstract
Rechargeable
zinc–air
batteries
typically
require
efficient,
durable,
and
inexpensive
bifunctional
electrocatalysts
to
support
oxygen
reduction/evolution
reactions
(ORR/OER).
However,
sluggish
kinetics
mass
transportation
challenges
must
be
addressed
if
the
performance
of
these
catalysts
is
enhanced.
Herein,
a
strategy
fabricate
catalyst
comprising
atomically
dispersed
iron
atoms
supported
on
mesoporous
nitrogen‐doped
carbon
(Fe
SAs/NC)
with
accessible
metal
sites
optimized
electronic
metal–support
interactions
developed.
Both
experimental
results
theoretical
calculations
reveal
that
engineered
structures
active
can
regulate
charge
distribution
Fe
centers
optimize
adsorption/desorption
oxygenated
intermediates.
The
SAs/NC
containing
1
N
4
O
achieves
remarkable
ORR
activity
over
entire
pH
range,
half‐wave
potentials
0.93,
0.83,
0.75
V
(vs
reversible
hydrogen
electrode)
in
alkaline,
acidic,
neutral
electrolytes,
respectively.
In
addition,
it
demonstrates
promising
low
overpotential
320
mV
at
10
mA
cm
−2
for
OER
alkaline
conditions.
battery
assembled
exhibits
superior
than
Pt/C+RuO
2
counterpart
terms
peak
power
density,
specific
capacity,
cycling
stability.
These
findings
demonstrate
importance
structure
engineering
directing
catalytic
activity.
Advanced Materials,
Journal Year:
2023,
Volume and Issue:
36(1)
Published: April 20, 2023
This
topical
review
focuses
on
the
distinct
role
of
carbon
support
coordination
environment
single-atom
catalysts
(SACs)
for
electrocatalysis.
The
article
begins
with
an
overview
atomic
configurations
in
SACs,
including
a
discussion
advanced
characterization
techniques
and
simulation
used
understanding
active
sites.
A
summary
key
electrocatalysis
applications
is
then
provided.
These
processes
are
oxygen
reduction
reaction
(ORR),
evolution
(OER),
hydrogen
(HER),
nitrogen
(NRR),
dioxide
(CO
Advanced Materials,
Journal Year:
2023,
Volume and Issue:
35(30)
Published: April 17, 2023
A
conventional
two-electrode
rechargeable
zinc-air
battery
(RZAB)
has
two
major
problems:
1)
opposing
requirements
for
the
oxygen
reduction
(ORR)
and
evolution
(OER)
reactions
from
catalyst
at
air
cathode;
2)
zinc-dendrite
formation,
hydrogen
generation,
zinc
corrosion
anode.
To
tackle
these
problems,
a
three-electrode
RZAB
(T-RZAB)
including
hydrophobic
discharge
cathode,
hydrophilic
charge
zinc-free
anode
is
developed.
The
decoupled
cathodes
enable
fast
ORR
OER
kinetics,
avoid
oxidization
of
catalyst.
using
tin-coated
copper
foam
that
induces
growth
(002)Zn
planes,
suppresses
evolution,
prevents
Zn
corrosion.
As
result,
T-RZABs
have
high
capacity
per
cycle
800
mAh
cm-2
,
low
voltage
gap
between
discharge/charge
platforms
0.66
V,
an
ultralong
life
5220
h
current
density
10
mA
.
large
T-RZAB
with
Ah
no
obvious
degradation
after
cycling
1000
Finally,
pack
energy
151.8
Wh
kg-1
cost
46.7
US
dollars
kWh-1
assembled.
Chemical Society Reviews,
Journal Year:
2024,
Volume and Issue:
53(10), P. 4877 - 4925
Published: Jan. 1, 2024
This
review
systematically
summarizes
various
redox
mechanisms
in
Zn-based
batteries
and
design
strategies
to
improve
their
electrochemical
performance,
which
provides
a
reference
for
future
development
of
high-performance
batteries.
