The
rational
design
of
p-n
heterojunction
was
highly
desirable
to
optimize
charge
distribution
at
space-charge
region,
tailoring
the
adsorption
free
energy
intermediate
matters,
and
boost
oxygen
evolution
reaction
(OER)
in
situ
electro-Fenton
(EF)
reaction.
Herein,
a
self-sacrificing
strategy
has
been
employed
construct
NiFe-MOF⊆LDH
nanosheet
arrays
on
carbon
cloth
(CC),
directly
using
NiFe-LDH
as
template.
exhibited
outperformed
OER
activity
with
lower
overpotential
196
mV
smaller
Tafel
slope
48
dec-1(η10).
conferred
higher
valence
state
for
Ni3+
more
carrier
density
absorb
OH-
ions
confirmed
by
in-situ
Raman
functional
theory
calculation
(DFT)
endowed
excellent
activity,
which
expected
endow
self-oxygenation
support
following
EF
this
system
without
additional
O2.
An
electrochemical
flow
reactor
designed
anodic
cathodic
only
low
voltage
1.6V.
Typically,
it
accessed
2e-
ORR
process
H2O2
yield
rate
up
27.4
mmol/h
O2,
generated
further
activated
Fe2+/Fe3+
cycling
heterogeneous
EF.
This
tandem
could
remove
96%
ibuprofen
(IBF)
within
120
min
long
term
cycle
use.
In
word,
coupling
possible
application
fields
sustainable
environmental
remediation.
Small,
Journal Year:
2024,
Volume and Issue:
20(43)
Published: July 6, 2024
Abstract
Hydrogen
is
a
fuel
of
the
future
that
has
potential
to
replace
conventional
fossil
fuels
in
several
applications.
The
quickest
and
most
effective
method
producing
pure
hydrogen
with
no
carbon
emissions
water
electrolysis.
Developing
highly
active
electrocatalysts
crucial
due
slow
kinetics
oxygen
evolution,
which
limit
usage
precious
metals
splitting.
Interfacial
engineering
heterostructures
sparked
widespread
interest
improving
charge
transfer
efficiency
optimizing
adsorption/desorption
energetics.
emergence
built‐in‐electric
field
between
RuO
2
MgFe‐LDH
improves
catalytic
toward
splitting
reaction.
However,
LDH‐based
materials
suffer
from
poor
conductivity,
necessitating
design
1D
by
integration
/
enhance
properties
through
large
surface
areas
high
electronic
conductivity.
Experimental
results
demonstrate
lower
overpotentials
(273
122
mV
at
10
mA
cm
−2
)
remarkable
stability
(60
h)
for
/MgFe‐LDH/Fiber
heterostructure
OER
(1
m
KOH)
HER
(0.5
H
SO
4
reactions.
Density
functional
theory
(DFT)
unveils
synergistic
mechanism
/MgFe‐LDH
interface,
leading
enhanced
activity
improved
adsorption
energy
atoms,
thereby
facilitating
catalysis.
