ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(32), P. 42230 - 42241
Published: July 31, 2024
Doping
heteroatoms
into
metal
phosphides
to
modify
their
electronic
structure
is
an
effective
method,
but
the
incomplete
exposure
of
active
sites
its
inherent
drawback.
In
this
experiment,
both
Se
doping
and
P
vacancies
are
simultaneously
introduced
CoP-Fe2P
(named
CoFe-P-Se)
enhance
internal
reactivity.
Benefiting
from
unique
hollow
porous
derived
MOF-on-MOF
template,
as
well
enhanced
intrinsic
activity
achieved
by
defects
doping,
CoFe-P-Se
exhibits
a
high
specific
capacitance
8.41
F
cm–2
at
current
density
2
mA
when
used
supercapacitor
electrode.
When
assembled
hybrid
with
activated
carbon,
energy
reaches
0.488
mWh
power
1.534
mW
cm–2,
capacity
retention
after
5000
charge–discharge
cycles
90.65%.
As
oxygen
evolution
reaction
(OER)
electrode,
electrode
shows
low
overpotential
only
230
mV
10
278
100
cm–2.
Additionally,
it
excellent
stability
for
over
50
h
The
designed
element
vacancy
engineering
in
work
will
provide
insight
constructing
high-performance
electrodes.