Applied Catalysis B Environment and Energy,
Год журнала:
2023,
Номер
343, С. 123584 - 123584
Опубликована: Дек. 1, 2023
The
electrocatalytic
process
of
water
splitting
offers
a
promising
approach
to
produce
sustainable
hydrogen.
However,
the
slow
kinetics
oxygen
evolution
reaction
(OER)
presents
notable
challenge,
especially
in
acidic
environment
proton
exchange
membrane
(PEM)
systems.
Despite
extensive
progress
made
catalyst
development
for
hydrogen
production
through
electrolysis
last
century,
significant
advancements
have
been
accomplished.
quest
OER
catalysts
that
possess
both
high
activity
and
stability,
while
also
being
affordable,
continues
be
challenging.
Currently,
Ru/Ir-based
electrocatalysts
are
only
practical
anode
available.
Therefore,
it
is
crucial
explore
feasible
strategies
enhance
performance
longevity
catalysts.
This
review
comprehensive
assessment
obstacles
prospective
Additionally,
underscores
areas
research
concentration,
providing
valuable
perspectives
future
endeavors
development.
Advanced Functional Materials,
Год журнала:
2024,
Номер
34(37)
Опубликована: Май 6, 2024
Abstract
The
exploitation
of
highly
activity
oxygen
evolution
reaction
(OER)
electrocatalysts
is
critical
for
the
application
electrocatalytic
water
splitting.
Triggering
lattice
mechanism
(LOM)
expected
to
provide
a
promising
pathway
overcome
sluggish
OER
kinetics,
however,
effectively
enhancing
involvement
remains
challenging.
In
this
study,
fabrication
B,
Fe
co‐doped
CoP
(B,
Fe─CoP)
nanofibers
reported,
which
serve
as
efficient
electrocatalyst
through
phosphorization
and
boronation
treatment
Fe‐doped
Co
3
O
4
nanofibers.
Experimental
results
combined
with
theoretical
calculations
reveal
that
simultaneous
incorporation
both
B
can
more
trigger
participation
in
CoFe
oxyhydroxides
reconstructed
from
Fe─CoP
compared
incorporating
only
or
Fe.
Therefore,
optimized
exhibit
superb
low
overpotentials
361
376
mV
at
1000
mA
cm
−2
alkaline
freshwater
natural
seawater,
respectively.
present
work
provides
significant
guidelines
innovative
design
concepts
development
following
LOM
pathway.
Advanced Materials,
Год журнала:
2024,
Номер
36(16)
Опубликована: Янв. 10, 2024
Abstract
Single‐atom
catalysts
(SACs)
are
demonstrated
to
show
exceptional
reactivity
and
selectivity
in
catalytic
reactions
by
effectively
utilizing
metal
species,
making
them
a
favorable
choice
among
the
different
active
materials
for
energy
conversion.
However,
SACs
still
early
stages
of
conversion,
problems
like
agglomeration
low
conversion
efficiency
hampering
their
practical
applications.
Substantial
research
focus
on
support
modifications,
which
vital
SAC
stability
due
intimate
relationship
between
atoms
support.
In
this
review,
category
supports
variety
surface
engineering
strategies
employed
SA
systems
summarized,
including
site
(heteroatom
doping,
vacancy
introducing,
groups
grafting,
coordination
tunning)
structure
(size/morphology
control,
cocatalyst
deposition,
facet
engineering,
crystallinity
control).
Also,
merits
single‐atom
systematically
introduced.
Highlights
comprehensive
summary
discussions
utilization
surface‐engineered
diversified
applications
photocatalysis,
electrocatalysis,
thermocatalysis,
devices.
At
end
potential
obstacles
using
field
discussed.
This
review
aims
guide
rational
design
manipulation
target‐specific
capitalizing
characteristic
benefits
engineering.
Advanced Functional Materials,
Год журнала:
2024,
Номер
34(34)
Опубликована: Март 20, 2024
Abstract
Sustaining
the
steady
state
for
highly
active
non‐stoichiometric
iridium
(Ir)‐based
oxide
(IrO
x
)
at
low
Ir
loading
remains
challenging
primarily
due
to
continuous
oxidation
and
sequent
dissolution
of
sites
during
oxygen
evolution
reaction
(OER).
In
this
context,
a
new
iridium–cerium
(Ce)
substitution
solid
solution
(SSO)
has
been
developed,
featuring
uniformly
dispersed
atoms
within
Ce
dioxide
(CeO
2
matrix
as
electron
buffer,
which
delivers
remarkable
acidic
OER
catalytic
activity
enhanced
stability.
The
electron‐buffering
capacity
CeO
facilitates
charge
transfer
toward
atoms,
leading
abundant
low‐valence
effectively
prevent
their
dissolution.
As
result,
Ir─Ce
SSO
demonstrates
an
overpotential
merely
238
mV@10
mA
cm
−2
.
Proton
exchange
membrane
water
electrolyzer
employing
396
µg
operates
consistently
over
100
h@500
Density
functional
theory
(DFT)
calculations
corroborate
that
effect
enriches
density
III
substantially
increases
energy
barrier
atoms.
This
study
presents
viable
approach
addressing
issues
instability
efficiency
in
Ir‐based
electrocatalysts
electrolysis.
Advanced Functional Materials,
Год журнала:
2023,
Номер
34(9)
Опубликована: Ноя. 20, 2023
Abstract
Recently,
conductive
metal–organic
frameworks
(c‐MOFs)
have
drawn
tremendous
attention
for
the
application
in
oxygen
evolution
reaction
(OER)
due
to
their
superior
conductivity
and
highly
accessible
active
sites.
Herein,
a
facile
method
is
reported
prepare
series
of
bimetallic
c‐MOFs
(Ni
x
Fe
1‐x
‐THQ,
THQ
=
tetrahydroxy‐1,4‐benzoquinone
hydrate)
by
using
smallest
benzene‐based
ligand
with
high‐density
catalytic
sites
OER.
By
adjusting
ratio
Ni/Fe,
catalysts
optimal
electronic
structures
adsorption
capacity
intermediates,
faster
charge
transport
are
obtained.
Among
them,
Ni
0.5
‐THQ
exhibits
performances
OER
low
overpotential
272
mV
at
10
mA
cm
−2
,
small
Tafel
slope
47.9
mV,
robust
operation
40
h
no
detectable
activity
decay,
which
far
commercial
RuO
2
most
traditional
MOFs
even
some
monometallic
MOFs.
Moreover,
both
measured
simulated
results
manifest
that
can
tailor
d‐band
center,
induce
directional
transfer
electrons,
optimizing
rate‐determining
step
intermediates
during
OER,
thus
electrochemical
activity.
This
work
not
only
presents
strategy
fabricate
an
electrocatalyst
remarkable
performance
but
also
promotes
development
THQ‐based
electrocatalysis.
