Carbon Energy,
Journal Year:
2023,
Volume and Issue:
5(6)
Published: Jan. 9, 2023
Abstract
The
ferrocene
(Fc)‐based
metal–organic
frameworks
(MOFs)
are
regarded
as
compelling
platforms
for
the
construction
of
efficient
and
robust
oxygen
evolution
reaction
(OER)
electrocatalysts
due
to
their
superior
conductivity
flexible
electronic
structure.
Herein,
density
functional
theory
simulations
were
addressed
predict
structure
regulations
CoFc‐MOF
by
nickel
doping,
which
demonstrated
that
well‐proposed
CoNiFc‐MOFs
delivered
a
small
energy
barrier,
promoted
conductivity,
well‐regulated
d‐band
center.
Inspired
these,
series
sea‐urchin‐like
successfully
synthesized
via
facile
solvothermal
method.
Moreover,
synchrotron
X‐ray
photoelectron
spectroscopy
measurements
manifested
introduction
could
tailor
catalyst
induce
directional
transfer
electrons,
thus
optimizing
rate‐determining
step
*O
→
*OOH
during
OER
process
yielding
decent
overpotentials
209
252
mV
at
10
200
mA
cm
−2
,
respectively,
with
Tafel
slope
39
dec
−1
.
This
work
presents
new
paradigm
developing
highly
durable
MOF‐based
OER.
Chemical Reviews,
Journal Year:
2023,
Volume and Issue:
123(9), P. 6257 - 6358
Published: March 21, 2023
The
oxygen
evolution
reaction
(OER)
and
reduction
(ORR)
are
core
steps
of
various
energy
conversion
storage
systems.
However,
their
sluggish
kinetics,
i.e.,
the
demanding
multielectron
transfer
processes,
still
render
OER/ORR
catalysts
less
efficient
for
practical
applications.
Moreover,
complexity
catalyst–electrolyte
interface
makes
a
comprehensive
understanding
intrinsic
mechanisms
challenging.
Fortunately,
recent
advances
in
situ/operando
characterization
techniques
have
facilitated
kinetic
monitoring
under
conditions.
Here
we
provide
selected
highlights
mechanistic
studies
with
main
emphasis
placed
on
heterogeneous
systems
(primarily
discussing
first-row
transition
metals
which
operate
basic
conditions),
followed
by
brief
outlook
molecular
catalysts.
Key
sections
this
review
focused
determination
true
active
species,
identification
sites,
reactive
intermediates.
For
in-depth
insights
into
above
factors,
short
overview
metrics
accurate
characterizations
is
provided.
A
combination
obtained
time-resolved
information
reliable
activity
data
will
then
guide
rational
design
new
Strategies
such
as
optimizing
restructuring
process
well
overcoming
adsorption-energy
scaling
relations
be
discussed.
Finally,
pending
current
challenges
prospects
toward
development
homogeneous
presented.
Advanced Materials,
Journal Year:
2022,
Volume and Issue:
34(12)
Published: Jan. 11, 2022
Rational
exploration
of
efficient,
inexpensive,
and
robust
electrocatalysts
is
critical
for
the
efficient
water
splitting.
Conjugated
conductive
metal-organic
frameworks
(cMOFs)
with
multicomponent
layered
double
hydroxides
(LDHs)
to
construct
bifunctional
heterostructure
catalysts
are
considered
as
an
but
complicated
strategy.
Here,
fabrication
a
cMOF/LDH
hetero-nanotree
array
catalyst
(CoNiRu-NT)
coupled
monodispersed
ruthenium
(Ru)
sites
via
controllable
grafted-growth
strategy
reported.
Rich-amino
hexaiminotriphenylene
linkers
coordinate
LDH
nanotrunk
form
cMOF
nanobranches,
providing
numerous
anchoring
precisely
confine
stabilize
RuN4
sites.
Moreover,
reduced
Ru
moieties
facilitate
H2
O
adsorption
dissociation,
heterointerface
between
further
modifies
chemical
electronic
structures.
Optimized
CoNiRu-NT
displays
significant
increase
in
electrochemical
water-splitting
properties
alkaline
media,
affording
low
overpotentials
22
mV
at
10
mA
cm-2
255
20
hydrogen
evolution
reaction
oxygen
reaction,
respectively.
In
actual
system,
drives
overall
splitting
cell
voltage
1.47
V
reach
.
This
performance
comparable
that
pure
noble-metal-based
materials
superior
most
reported
MOF-based
catalysts.
Advanced Energy Materials,
Journal Year:
2023,
Volume and Issue:
13(31)
Published: June 29, 2023
Abstract
Transition
metal‐based
oxyhydroxides
(MOOH)
derived
from
the
irreversible
structural
reconstruction
of
precatalysts
are
often
acknowledged
as
real
catalytic
species
for
oxygen
evolution
reaction
(OER).
Typically,
reconstruction‐derived
MOOH
would
exhibit
superior
OER
activity
compared
to
their
directly
synthesized
counterparts,
despite
being
fundamentally
similar
in
chemistry.
As
such,
has
emerged
a
promising
strategy
boost
electrocatalysts.
However,
in‐depth
understanding
origin
reconstructed
materials
still
remains
ambiguous,
which
significantly
hinders
further
developments
highly
efficient
electrocatalysts
based
on
In
this
review,
comprehensive
overview
behaviors
reported
is
provided
and
intrinsic
chemical
origins
high
efficiency
toward
unveiled.
The
fundamentals
mechanisms,
along
with
recommended
characterization
techniques
dynamic
process
analyzing
structure
also
interpreted.
Finally,
view
chemistry,
potential
perspectives
facilitate
design
synthesis
durable
electrocatalyst
presented.
Advanced Materials,
Journal Year:
2023,
Volume and Issue:
35(39)
Published: Jan. 14, 2023
Abstract
The
energy
efficiency
of
metal–air
batteries
and
water‐splitting
techniques
is
severely
constrained
by
multiple
electronic
transfers
in
the
heterogenous
oxygen
evolution
reaction
(OER),
high
overpotential
induced
sluggish
kinetics
has
become
an
uppermost
scientific
challenge.
Numerous
attempts
are
devoted
to
enabling
activity,
selectivity,
stability
via
tailoring
surface
physicochemical
properties
nanocatalysts.
Lattice‐strain
engineering
as
a
cutting‐edge
method
for
tuning
geometric
configuration
metal
sites
plays
pivotal
role
regulating
interaction
catalytic
surfaces
with
adsorbate
molecules.
By
defining
d‐band
center
descriptor
structure–activity
relationship,
individual
contribution
strain
effects
within
state‐of‐the‐art
electrocatalysts
can
be
systematically
elucidated
OER
optimization
mechanism.
In
this
review,
fundamentals
advancements
strain‐catalysts
showcased
innovative
trigger
strategies
enumerated,
particular
emphasis
on
feedback
mechanism
between
precise
regulation
lattice‐strain
optimal
activity.
Subsequently,
modulation
various
attributes
categorized
impediments
encountered
practicalization
strained
effect
discussed,
ending
outlook
future
research
directions
burgeoning
field.
Chemical Reviews,
Journal Year:
2023,
Volume and Issue:
123(23), P. 12795 - 13208
Published: Nov. 15, 2023
Transition
metal
borides,
carbides,
pnictides,
and
chalcogenides
(X-ides)
have
emerged
as
a
class
of
materials
for
the
oxygen
evolution
reaction
(OER).
Because
their
high
earth
abundance,
electrical
conductivity,
OER
performance,
these
electrocatalysts
potential
to
enable
practical
application
green
energy
conversion
storage.
Under
potentials,
X-ide
demonstrate
various
degrees
oxidation
resistance
due
differences
in
chemical
composition,
crystal
structure,
morphology.
Depending
on
oxidation,
catalysts
will
fall
into
one
three
post-OER
electrocatalyst
categories:
fully
oxidized
oxide/(oxy)hydroxide
material,
partially
core@shell
unoxidized
material.
In
past
ten
years
(from
2013
2022),
over
890
peer-reviewed
research
papers
focused
electrocatalysts.
Previous
review
provided
limited
conclusions
omitted
significance
"catalytically
active
sites/species/phases"
this
review,
comprehensive
summary
(i)
experimental
parameters
(e.g.,
substrates,
loading
amounts,
geometric
overpotentials,
Tafel
slopes,
etc.)
(ii)
electrochemical
stability
tests
post-analyses
publications
from
2022
is
provided.
Both
mono
polyanion
X-ides
are
discussed
classified
with
respect
material
transformation
during
OER.
Special
analytical
techniques
employed
study
reconstruction
also
evaluated.
Additionally,
future
challenges
questions
yet
be
answered
each
section.
This
aims
provide
researchers
toolkit
approach
showcase
necessary
avenues
investigation.
Angewandte Chemie International Edition,
Journal Year:
2022,
Volume and Issue:
62(9)
Published: Dec. 5, 2022
Abstract
Transition
metal
complexes
are
well‐known
homogeneous
electrocatalysts.
In
this
regard,
metal–organic
frameworks
(MOFs)
can
be
considered
as
an
ensemble
of
transition
ordered
in
a
periodic
arrangement.
addition,
MOFs
have
several
additional
positive
structural
features
that
make
them
suitable
for
electrocatalysis,
including
large
surface
area,
high
porosity,
and
content
accessible
with
exchangeable
coordination
positions.
The
present
review
describes
the
current
state
use
electrocatalysts,
both
host
electroactive
guests
their
direct
electrocatalytic
activity,
particularly
case
bimetallic
MOFs.
field
MOF‐derived
materials
is
purposely
not
covered,
focusing
on
or
its
composites
Special
attention
has
been
paid
to
strategies
overcome
poor
electrical
conductivity
limited
stability.
