Chemistry - An Asian Journal,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 12, 2025
Abstract
Proton
exchange
membrane
water
electrolysis
(PEMWE)
offers
several
advantages
over
alkaline
electrolysis,
including
a
more
compact
design,
faster
response
time,
lower
ohmic
losses,
and
higher
gas
purity.
However,
the
harsh
acidic
conditions
required
for
PEMWE
have
led
to
use
of
noble
metal‐based
electrocatalysts
oxygen
evolution
reaction
(OER),
particularly
ruthenium
(Ru)
iridium
(Ir),
which
are
both
scarce
costly.
In
recent
years,
significant
progress
has
been
made
in
development
cobalt
(Co)‐based
electrocatalysts,
exhibit
promising
performance
OER,
providing
sustainable
cost‐effective
alternative
precious
metals.
This
review
provides
comprehensive
summary,
classification,
discussion
latest
Co‐based
catalysts
OER.
Key
insights
into
fundamental
mechanisms
as
well
relationships
between
catalytic
activity
stability,
highlighted.
Additionally,
examines
various
synthesis
strategies
highlights
methods
enhance
their
OER
performance.
Finally,
concludes
by
addressing
current
challenges
field
offering
future
research
directions
aimed
at
developing
high‐performance
materials
efficient
under
conditions.
Deleted Journal,
Год журнала:
2023,
Номер
2, С. e9120056 - e9120056
Опубликована: Фев. 25, 2023
Iridium
(Ir)-based
catalysts
are
highly
efficient
for
the
anodic
oxygen
evolution
reaction
(OER)
due
to
high
stability
and
anti-corrosion
ability
in
strong
acid
electrolyte.
Recently,
intensive
attention
has
been
directed
novel,
efficient,
low-cost
Ir-based
overcome
challenges
of
their
application
water
electrolysis
technique.
To
make
a
comprehensive
understanding
recently
developed
catalytic
properties,
mechanism
promotion
principles
were
discussed
OER
condition
aimed
proton
exchange
membrane
electrolyzer
(PEMWE)
this
review.
The
mechanisms
adsorbate
lattice
first
presented
easy
mechanism;
brief
perspective
analysis
from
aspects
geometric
effect,
electronic
synergistic
defect
engineering,
support
effect
was
concluded.
Then,
latest
progress
practical
introduced
detail,
which
classified
into
varied
composition
Ir
catalyst
terms
alloys,
hetero-element
doping,
perovskite,
pyrochlore,
heterostructure,
core–shell
structure,
supported
catalysts.
Finally,
problems
faced
by
current
acidic
electrolyte
put
forward.
It
is
concluded
that
with
low
loading
should
be
future,
paid
probing
structural
performance
correlation,
real
PEMWE
devices.Hopefully,
effort
can
helpful
catalysis
OER,
instructive
novel
design
fabrication.
Applied Catalysis A General,
Год журнала:
2023,
Номер
661, С. 119254 - 119254
Опубликована: Май 5, 2023
In
a
bid
to
tackle
the
degrading
climate
conditions,
new
age
research
in
catalysis
is
predominantly
focused
on
sustainable
technologies
associated
with
renewable
energy
conversion
and
environment
purification.
One
of
primary
motivations
for
use
low-cost,
earth-abundant
materials
that
can
fulfill
scale-up
needs
respective
technologies.
Cobalt
(Co)
based
catalysts
have
been
an
indispensable
part
almost
all
areas
they
are
often
looked
at
as
low-cost
substitutes
precious
metal-based
catalysts.
context
environmental
applications,
Co-based
more
commonly
used
reactions
such
hydrogen
evolution
reaction
(HER),
oxygen
(OER),
hydrolysis
chemical
hydrides,
CO2
reduction
(CO2RR)
advanced
oxidation
processes
(AOPs).
interesting
compounds
Co
plays
diverse
role
facilitating
different
reactions.
This
review
provides
brief
account
significance
elaborates
their
advancement
each
above-mentioned
applications
presents
future
directions
An
in-depth
analysis
gain
deeper
understanding
systems
highly
desired
promote
breakthroughs
catalysis.
Abstract
Transition
metal
oxides/hydroxides
exhibit
reasonable
oxygen
activity
in
alkaline
electrolytes
and
have
been
identified
as
potential
electrocatalysts.
Some
highly
active
transition
oxides
or
hydroxides
can
alter
their
surface
chemistry
response
to
the
electrolyte
environment.
This
review
presents
performance
of
some
recently
developed
metal‐based
electrocatalytic
evolution
reaction
(OER).
Despite
promising
catalytic
many
metals
alloys
due
incompletely
filled
d
orbitals,
low
corrosion
resistance
media
barriers
use
Metallic
glasses
(MGs),
with
disordered
atomic
structure,
unique
exciting
properties
that
cannot
be
found
crystalline
metals.
glasses′
chemical
stem
from
metastable
defective
nature,
well
structural
homogeneity.
In
case
Zr‐based
MGs,
presence
MG−OH
ads
MG−O
x
species
on
for
enables
rapid
electron
transfer
chemisorbed
OH
−
an
“activated”
MG
leading
generation
amorphous
Zr‐rich
layer.
oxide
layer
formation
favors
OER
understood
by
decreased
Tafel
slope
stable
nature
during
open
circuit
measurements
solution.
Unlike
as‐spun
counterpart,
relatively
small
impedance
magnitude
characteristic
frequency
post‐OER
electrode
corroborate
enhancement
kinetics
after
electrochemistry.
Compared
early
discovered
electrodes,
MG‐oxide
assembly
outperforms
precision
composite
forms
regarding
electroactivity
stability.
Inorganic Chemistry,
Год журнала:
2024,
Номер
63(11), С. 4883 - 4897
Опубликована: Март 4, 2024
The
reaction
of
Co(OAc)2·6H2O
with
2,2′-[{(1E,1′E)-pyridine-2,6-diyl-bis(methaneylylidene)bis(azaneylylidene)}diphenol](LH2)
a
multisite
coordination
ligand
and
Et3N
in
1:2:3
stoichiometric
ratio
forms
tetranuclear
complex
Co4(L)2(μ-η1:η1-OAc)2(η2-OAc)2]·
1.5
CH3OH·
CHCl3
(1).
Based
on
X-ray
diffraction
investigations,
1
comprises
distorted
Co4O4
cubane
core
consisting
two
completely
deprotonated
ligands
[L]2–
four
acetate
ligands.
Two
distinct
types
CoII
centers
exist
the
complex,
where
Co(2)
center
has
octahedral
geometry;
alternatively,
Co(1)
pentagonal–bipyramidal
geometry.
Analysis
magnetic
data
shows
predominant
antiferromagnetic
coupling
(J
=
−2.1
cm–1),
while
anisotropy
is
easy-plane
type
(D1
8.8,
D2
0.76
cm–1).
Furthermore,
demonstrates
an
electrochemical
oxygen
evolution
(OER)
overpotential
325
mV
Tafel
slope
85
dec–1,
required
to
attain
current
density
10
mA
cm–2
moderate
stability
under
alkaline
conditions
(pH
14).
Electrochemical
impedance
spectroscopy
studies
reveal
that
compound
charge
transfer
resistance
(Rct)
2.927
Ω,
which
comparatively
lower
than
standard
Co3O4
(5.242
Ω),
indicating
rapid
kinetics
between
electrode
electrolyte
solution
enhances
higher
catalytic
activity
toward
OER
kinetics.
