Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 30, 2024
Abstract
The
applications
of
Fe‐based
electrocatalysts
in
oxygen
evolution
reactions
(OER)
and
hydrogen
(HER)
are
hindered
due
to
poor
stability
catalytic
activity
originating
from
rapid
Fe
leaching
the
intrinsic
electronic
structure
FeOOH.
Here,
study
presents
a
strategy
precisely
continuously
tune
morphology
FeOOH
covalent
characteristics
Fe–O
bonds
by
controlling
coverage
extracellular
polymeric
substances
(EPS)
on
surface.
Operando
spectroscopy
theoretical
calculations
reveal
that
regulating
covalency
induces
changes
intermediate
adsorption
strength
metal
leaching,
leading
volcano‐shaped
trend
durability
as
function
covalency.
Notably,
HER,
negatively
charged
sites
EPS
exhibit
superior
*H
compared
bare
In
particular,
2
@FeOOH
exhibits
excellent
performance
for
both
OER
(η
10
=
240
mV)
HER
52
mV),
with
outstanding
over
200
hours
at
100
mA
cm⁻
.
current
density
also
reaches
merely
1.51
V
two‐electrode
configuration,
significantly
surpassing
other
bifunctional
electrocatalysts.
This
approach
will
provide
promising
pathway
enhance
water
electrolysis
through
precise
modulation
coverage.
Advanced Science,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 7, 2025
Abstract
Overall
water
splitting
(OWS)
to
produce
hydrogen
has
attracted
large
attention
in
recent
years
due
its
ecological‐friendliness
and
sustainability.
However,
the
efficiency
of
OWS
been
forced
by
sluggish
kinetics
four‐electron
oxygen
evolution
reaction
(OER).
The
replacement
OER
alternative
electrooxidation
small
molecules
with
more
thermodynamically
favorable
potentials
may
fundamentally
break
limitation
achieve
production
low
energy
consumption,
which
also
be
accompanied
value‐added
chemicals
than
or
electrochemical
degradation
pollutants.
This
review
critically
assesses
latest
discoveries
coupled
various
OWS,
including
alcohols,
aldehydes,
amides,
urea,
hydrazine,
etc.
Emphasis
is
placed
on
corresponding
electrocatalyst
design
related
mechanisms
(e.g.,
dual
hydrogenation
N–N
bond
breaking
hydrazine
C═N
regulation
urea
inhibit
hazardous
NCO
−
NO
productions,
etc.),
along
emerging
reactions
(electrooxidation
tetrazoles,
furazans,
iodide,
quinolines,
ascorbic
acid,
sterol,
trimethylamine,
etc.).
Some
new
decoupled
electrolysis
self‐powered
systems
are
discussed
detail.
Finally,
potential
challenges
prospects
highlighted
aid
future
research
directions.
Advanced Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 19, 2025
Abstract
Efficient
charge
separation
at
the
semiconductor/cocatalyst
interface
is
crucial
for
high‐performance
photoelectrodes,
as
it
directly
influences
availability
of
surface
charges
solar
water
oxidation.
However,
establishing
strong
molecular‐level
connections
between
these
interfaces
to
achieve
superior
interfacial
quality
presents
significant
challenges.
This
study
introduces
an
innovative
electrochemical
etching
method
that
generates
a
high
concentration
oxygen
vacancy
sites
on
BiVO
4
surfaces
(Ov‐BiVO
),
enabling
interactions
with
oxygen‐rich
ligands
MIL‐101.
reduces
formation
energy
and
promotes
conformal
growth
.
The
Ov‐BiVO
/MIL‐101
composite
exhibits
ideal
interface,
achieving
impressive
photocurrent
density
5.91
mA
cm
−2
1.23
V
RHE
,
along
excellent
stability.
high‐performing
photoanode
enables
unbiased
tandem
device
/MIL‐101‐Si
cell
system,
solar‐to‐hydrogen
efficiency
4.33%.
integration
mitigates
states
enhances
internal
electric
field,
facilitating
migration
photogenerated
holes
into
MIL‐101
overlayer.
process
activates
highly
efficient
Fe
catalytic
sites,
which
effectively
adsorb
molecules,
lowering
barrier
oxidation
improving
kinetics.
Further
studies
confirm
broad
applicability
vacancy‐induced
molecular
epitaxial
in
various
MOFs,
offering
valuable
insights
defect
engineering
optimizing
enhancing
photocatalytic
activity.
