Advanced Functional Materials,
Journal Year:
2022,
Volume and Issue:
32(28)
Published: April 13, 2022
Abstract
The
single‐phase
oxides
with
elemental
complexity
and
compositional
diversity,
usually
named
high
entropy
oxides,
feature
homogeneously
dispersed
multi‐metallic
elements
in
equiatomic
concentration.
unusual
properties
of
endow
their
potential
application
clean‐energy‐related
electrocatalysis.
However,
the
possible
fundamental
relationship
between
configuration
underlying
catalytic
mechanism
is
still
not
well
understood
established.
Herein,
a
perovskite
cobaltate
consisting
five
equimolar
metals
B‐site
(Mg,
Mn,
Fe,
Co,
Ni)
employed
as
an
electrocatalyst
for
oxygen
evolution
reaction
(OER).
serves
effective
tool
to
promote
intrinsic
activity
Co
reactive
site
manipulate
OER
mechanism.
demonstrates
lower
overpotential
320
mV
at
current
density
10
mA
cm
−2
,
outperforming
other
counterparts.
X‐ray
spectroscopies
disclose
synergistic
charge‐exchange
effect
among
different
cations
formation
new
hole
state.
Combinatorially
computational
experimental
results
unveil
enigma
that
leads
random
occupation
cations,
facilitates
surface
reconstruction,
benefits
stable
vacancies.
Owing
these
merits,
O
2
found
be
kinetically
favorable
via
lattice
Chemical Society Reviews,
Journal Year:
2022,
Volume and Issue:
51(11), P. 4583 - 4762
Published: Jan. 1, 2022
Replacing
fossil
fuels
with
energy
sources
and
carriers
that
are
sustainable,
environmentally
benign,
affordable
is
amongst
the
most
pressing
challenges
for
future
socio-economic
development.
Nano Convergence,
Journal Year:
2021,
Volume and Issue:
8(1)
Published: Feb. 11, 2021
As
a
promising
substitute
for
fossil
fuels,
hydrogen
has
emerged
as
clean
and
renewable
energy.
A
key
challenge
is
the
efficient
production
of
to
meet
commercial-scale
demand
hydrogen.
Water
splitting
electrolysis
pathway
achieve
in
terms
energy
conversion
storage
which
catalysis
or
electrocatalysis
plays
critical
role.
The
development
active,
stable,
low-cost
catalysts
electrocatalysts
an
essential
prerequisite
achieving
desired
electrocatalytic
from
water
practical
use,
constitutes
central
focus
this
review.
It
will
start
with
introduction
performance
evaluation
various
activity,
stability,
efficiency.
This
be
followed
by
outlining
current
knowledge
on
two
half-cell
reactions,
evolution
reaction
(HER)
oxygen
(OER),
mechanisms
alkaline
acidic
media.
Recent
advances
design
preparation
nanostructured
noble-metal
non-noble
metal-based
discussed.
New
strategies
insights
exploring
synergistic
structure,
morphology,
composition,
active
sites
increasing
activity
stability
HER
OER
highlighted.
Finally,
future
challenges
perspectives
robust
towards
also
outlined.
Small,
Journal Year:
2021,
Volume and Issue:
17(37)
Published: June 10, 2021
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.
Energy & Environmental Science,
Journal Year:
2021,
Volume and Issue:
14(4), P. 1897 - 1927
Published: Jan. 1, 2021
The
review
summarizes
transition
metal-based
bimetallic
MOFs
and
their
derived
materials
as
electrocatalytic
for
the
OER.
mechanisms
of
OER
probed
by
DFT
calculation
andin
situcharacterization
techniques
are
also
discussed.
Advanced Materials,
Journal Year:
2021,
Volume and Issue:
33(50)
Published: March 21, 2021
Abstract
The
rapid
progress
of
proton
exchange
membrane
fuel
cells
(PEMFCs)
and
alkaline
(AMFCs)
has
boosted
the
hydrogen
economy
concept
via
diverse
energy
applications
in
past
decades.
For
a
holistic
understanding
development
status
PEMFCs
AMFCs,
recent
advancements
electrocatalyst
design
catalyst
layer
optimization,
along
with
cell
performance
terms
activity
durability
are
summarized
here.
activity,
stability,
different
types
electrocatalysts
for
both
oxygen
reduction
reaction
oxidation
discussed
compared.
Research
directions
on
further
active,
stable,
low‐cost
to
meet
ultimate
commercialization
AMFCs
also
discussed.
Chemical Society Reviews,
Journal Year:
2021,
Volume and Issue:
50(17), P. 9817 - 9844
Published: Jan. 1, 2021
This
review
summarizes
the
recent
progress
related
to
field
of
doping
regulation
in
transition
metal
compounds,
aiming
give
an
overview
this
strategy
for
designing
high-performance
catalysts
towards
electrocatalytic
applications.
Advanced Materials,
Journal Year:
2020,
Volume and Issue:
32(31)
Published: June 26, 2020
Abstract
Electrocatalysts
based
on
hierarchically
structured
and
heteroatom‐doped
non‐noble
metal
oxide
materials
are
of
great
importance
for
efficient
low‐cost
electrochemical
water
splitting
systems.
Herein,
the
synthesis
a
series
hierarchical
hollow
nanoplates
(NPs)
composed
ultrathin
Co
3
O
4
nanosheets
doped
with
13
different
atoms
is
reported.
The
involves
cooperative
etching−coordination−reorganization
approach
starting
from
zeolitic
imidazolate
framework‐67
(ZIF‐67)
NPs.
First,
atom
decorated
ZIF‐67
NPs
unique
cross‐channels
formed
through
Lewis
acid
etching
species
coordination
process.
Afterward,
composite
converted
to
solvothermal
reaction,
during
which
guest
into
octahedral
sites
.
Density
functional
theory
calculations
suggest
that
doping
small
amount
Fe
near
surface
can
greatly
enhance
electrocatalytic
activity
toward
oxygen
evolution
reaction
(OER).
Benefiting
structural
compositional
advantages,
obtained
Fe‐doped
manifest
superior
performance
OER
an
overpotential
262
mV
at
10
mA
cm
−2
,
Tafel
slope
43
dec
−1
excellent
stability
even
high
current
density
100
50
h.
Advanced Energy Materials,
Journal Year:
2022,
Volume and Issue:
12(24)
Published: May 1, 2022
Abstract
Oxygen
evolution
reaction
(OER),
as
a
relevant
half
for
water
splitting
to
address
the
energy
crisis,
has
captured
great
deal
of
attention.
However,
this
technology
always
been
impeded
by
lack
highly
efficient
and
stable
electrocatalyst.
Amorphous
materials,
which
possess
long‐range
disorder
only
short‐range
order
over
few
atoms,
are
often
superior
their
crystalline
counterparts
in
electrocatalysis
owing
more
active
sites,
broader
chemical
composition
range,
structural
flexibility.
This
review
first
introduces
some
assessment
criteria
OER
then
presents
theoretical
modeling
mechanisms
state‐of‐the‐art
amorphous
transition
metal‐based
electrocatalysts,
involving
oxides,
hydroxides,
sulfides,
phosphides,
borides,
composites,
well
practical
applications
OER.
Finally,
recent
development,
existing
challenges,
future
perspectives
electrocatalysts
discussed.
paper
offers
valuable
guidance
designing
applications.
Angewandte Chemie International Edition,
Journal Year:
2021,
Volume and Issue:
60(21), P. 11841 - 11846
Published: March 19, 2021
Abstract
The
development
of
efficient
and
low‐cost
electrocatalysts
toward
the
oxygen
evolution
reaction
(OER)
is
critical
for
improving
efficiency
several
electrochemical
energy
conversion
storage
devices.
Here,
we
report
an
elaborate
design
synthesis
porous
Co‐based
trimetallic
spinel
oxide
nanoboxes
(NiCo
2−
x
Fe
O
4
NBs)
by
a
novel
metal‐organic
framework
engaged
strategy,
which
involves
chemical
etching,
cation
exchange,
subsequent
thermal
oxidation
processes.
Owing
to
structural
compositional
advantages,
optimized
NiCo
NBs
(
about
0.117)
deliver
superior
electrocatalytic
performance
OER
with
overpotential
274
mV
at
10
mA
cm
−2
,
small
Tafel
slope
42
dec
−1
good
stability
in
alkaline
electrolyte,
much
better
than
that
bi/monometallic
oxides
even
commercial
RuO
2
.
