Advanced Materials,
Journal Year:
2020,
Volume and Issue:
32(39)
Published: Aug. 26, 2020
Abstract
Herein,
a
strategy
is
reported
for
the
fabrication
of
NiCo
2
O
4
‐based
mesoporous
nanosheets
(PNSs)
with
tunable
cobalt
valence
states
and
oxygen
vacancies.
The
optimized
2.148
PNSs
an
average
Co
state
2.3
uniform
nm
nanopores
present
excellent
catalytic
performance
ultralow
overpotential
190
mV
at
current
density
10
mA
cm
−2
long‐term
stability
(700
h)
evolution
reaction
(OER)
in
alkaline
media.
Furthermore,
Zn–air
batteries
built
using
high
power
energy
83
mW
910
Wh
kg
−1
,
respectively.
Moreover,
portable
battery
box
as
air
cathode
presents
120
h
under
low
temperatures
range
0
to
−35
°C.
Density
functional
theory
calculations
reveal
that
prominent
electron
exchange
transfer
activity
electrocatalyst
attributed
surface
lower‐coordinated
Co‐sites
porous
region
presenting
merging
3d–e
g
–t
2g
band,
which
overlaps
Fermi
level
system.
This
favors
adsorption
*OH,
stabilized
*O
radicals
are
reached,
toward
competitively
lower
overpotential,
demonstrating
generalized
key
optimally
boosting
overall
OER
performance.
Chemical Society Reviews,
Journal Year:
2021,
Volume and Issue:
50(13), P. 7745 - 7778
Published: Jan. 1, 2021
Bifunctional
oxygen
reduction
and
evolution
constitute
the
core
processes
for
sustainable
energy
storage.
The
advances
on
noble-metal-free
bifunctional
electrocatalysts
are
reviewed.
Angewandte Chemie International Edition,
Journal Year:
2021,
Volume and Issue:
60(25), P. 14005 - 14012
Published: March 31, 2021
Abstract
Dual‐metal
single‐atom
catalysts
exhibit
superior
performance
for
oxygen
reduction
reaction
(ORR),
however,
the
synergistic
catalytic
mechanism
is
not
deeply
understood.
Herein,
we
report
a
dual‐metal
catalyst
consisted
of
Cu−N
4
and
Zn−N
on
N‐doped
carbon
support
(Cu/Zn−NC).
It
exhibits
high‐efficiency
ORR
activity
with
an
E
onset
0.98
V
1/2
0.83
V,
excellent
stability
(no
degradation
after
10
000
cycles),
surpassing
state‐of‐the‐art
Pt/C
great
mass
Pt‐free
single
atom
catalysts.
Operando
XANES
demonstrates
that
as
active
center
experiences
change
from
atomic
dispersion
to
cluster
cooperation
during
process,
then
turns
state
again
reaction.
DFT
calculation
further
indicates
adjustment
effect
Zn
d‐orbital
electron
distribution
Cu
could
benefit
stretch
cleavage
O‐O
center,
speeding
up
process
rate
determining
step
OOH*.
ACS Catalysis,
Journal Year:
2021,
Volume and Issue:
11(20), P. 12485 - 12509
Published: Sept. 27, 2021
Electrocatalytic
water
splitting
is
a
sustainable
way
to
produce
hydrogen
energy,
but
the
oxygen
evolution
reaction
(OER)
at
anode
has
sluggish
kinetics
and
low
energy
conversion
efficiency,
which
major
bottleneck
for
large-scale
production.
The
design
synthesis
of
robust
low-cost
OER
catalysts
are
crucial
OER.
NiCo-based
electrocatalysts
have
suitable
atomic
electronic
structures,
show
high
activity
stability
during
process.
Recently,
significant
progress
been
made
in
regulating
structure
composition
understanding
nature
catalysis,
especially
mechanism,
catalytic
active
sites,
structure–activity
relationship.
In
this
work,
we
summarized
discussed
latest
development
OER,
with
particular
emphasis
on
catalyst
synthesis,
strategies
boosting
performance,
catalysis
from
experimental
theoretical
perspectives.
some
descriptors,
relationships
based
unveiled.
Finally,
challenges
futuristic
outlooks
improving
performance
proposed,
hope
review
can
provide
guidance
more
efficient
electrocatalysts.
Energy & Environmental Science,
Journal Year:
2020,
Volume and Issue:
13(12), P. 4536 - 4563
Published: Jan. 1, 2020
This
review
presents
the
recent
progress
in
advanced
bifunctional
heteroatom-doped
carbon
catalysts
for
rechargeable
aqueous
and
all-solid-state
Zn–air
batteries,
along
with
current
challenges
future
perspectives
field.
Advanced Functional Materials,
Journal Year:
2020,
Volume and Issue:
31(9)
Published: Dec. 6, 2020
Abstract
Efficient
electrocatalysts
are
key
requirements
for
the
development
of
ecofriendly
electrochemical
energy‐related
technologies
and
devices.
It
is
widely
recognized
that
introduction
vacancies
becoming
an
important
valid
strategy
to
promote
electrocatalytic
performances
designed
nanomaterials.
In
this
review,
significance
(i.e.,
cationic
vacancies,
anionic
mixed
vacancies)
on
improvement
via
three
main
functionalities,
including
tuning
electronic
structure,
regulating
active
sites,
improving
electrical
conductivity,
systematically
discussed.
Recent
achievements
in
vacancy
engineering
various
hotspot
processes
comprehensively
summarized,
with
focus
oxygen
reduction
reaction
(ORR),
evolution
(OER),
hydrogen
(HER),
nitrogen
(NRR),
CO
2
(CO
RR),
their
further
applications
overall
water‐splitting
zinc–air
battery
The
recent
other
also
summarized.
Finally,
challenges
prospects
regulate
different
reactions
Energy & Environmental Science,
Journal Year:
2020,
Volume and Issue:
13(8), P. 2431 - 2440
Published: Jan. 1, 2020
Hierarchical
porous
carbon
nanofibers
can
efficiently
eliminate
kinetics
and
capacity
mismatches
between
the
anode
cathode
of
potassium-ion
hybrid
capacitor.
Chemical Reviews,
Journal Year:
2022,
Volume and Issue:
122(11), P. 10087 - 10125
Published: April 21, 2022
Metal–organic
frameworks
(MOFs)
have
recently
emerged
as
ideal
electrode
materials
and
precursors
for
electrochemical
energy
storage
conversion
(EESC)
owing
to
their
large
specific
surface
areas,
highly
tunable
porosities,
abundant
active
sites,
diversified
choices
of
metal
nodes
organic
linkers.
Both
MOF-based
MOF-derived
in
powder
form
been
widely
investigated
relation
synthesis
methods,
structure
morphology
controls,
performance
advantages
targeted
applications.
However,
engage
them
applications,
both
binders
additives
would
be
required
postprocessed
electrodes,
fundamentally
eliminating
some
the
sites
thus
degrading
superior
effects
MOF-based/derived
materials.
The
advancement
freestanding
electrodes
provides
a
new
promising
platform
EESC
thanks
apparent
merits,
including
fast
electron/charge
transmission
seamless
contact
between
current
collectors.
Benefiting
from
synergistic
effect
structures
materials,
outstanding
can
achieved,
stimulating
increasing
enthusiasm
recent
years.
This
review
timely
comprehensive
overview
on
structural
features
fabrication
techniques
electrodes.
Then,
latest
advances
are
summarized
devices
electrocatalysis.
Finally,
insights
into
currently
faced
challenges
further
perspectives
these
feasible
solutions
discussed,
aiming
at
providing
set
guidance
promote
development
scale-up
production
commercial
