Synthesizing
bifunctional
electrocatalysts
capable
of
concurrently
accelerating
the
kinetics
both
hydrogen
evolution
reaction
(HER)
and
hydrazine
oxidation
(HzOR)
remains
a
formidable
hurdle
with
academic
research.
Herein,
nanoneedle-like
electrocatalyst
triphasic
nanointerface,
consisting
crystalline
Co(OH)F,
amorphous
Co–S,
CeO2,
was
synthesized
on
nickel
foam
(NF)
(Co(OH)F/Co–S/CeO2/NF)
through
an
integrated
hydrothermal–sulfidation–deposition
strategy.
Co(OH)F/Co–S/CeO2/NF
not
only
possessed
abundant
active
sites
but
also
minimized
charge-transfer
resistance
optimized
electron
distribution
across
interfaces,
thus
significantly
kinetics.
Then,
it
demonstrated
overpotential
153
mV
for
HER
low
potential
80
HzOR
at
10
mA
cm–2,
respectively.
Employing
as
catalytic
electrode,
impressively
cell
voltage
0.20
V
sufficient
to
achieve
flow
cm–2
during
hydrazine-assisted
overall
water
splitting.
Density
functional
theory
calculations
elucidated
that
superior
performance
originated
from
balanced
adsorption
energy
(ΔGH*)
process
altered
rate-limiting
step
relatively
barrier
in
HzOR.
This
research
offers
valuable
insights
into
development
sophisticated
electrocatalysts,
advancing
large-scale
deployment
energy-conserving
H2
production
technologies.
Journal of Biomaterials Science Polymer Edition,
Journal Year:
2024,
Volume and Issue:
35(15), P. 2343 - 2362
Published: July 22, 2024
In
this
study,
a
three-layer
small
diameter
artificial
vascular
graft
with
structure
similar
to
that
of
natural
blood
vessels
was
first
constructed
by
triple-step
electrospinning
technology,
in
which
polylactic
acid
(PLA)
and
collagen
(COL)
were
used
for
the
inner
layer,
polycaprolactone
(PCL)
middle
layer
gelatin
outer
layer.
The
properties
adjusted
EDC/NHS
cross-linking
agent
through
reaction
between
or
gelatine
EDC/NHS.
mechanical
hydrophilic
cross-linked
substantially
enhanced,
maximum
stress
9.56
MPa
axial
direction
9.31
radial
P/C
(4:1)
graft,
exceeded
many
textile-based
grafts.
increased
hydrophilicity
vessel
before
crosslinking
due
addition
COL,
after
had
substantial
increase
production
more
urea
derivative.
led
easier
cell
adhesion
vessel,
especially
(2:1)
where
proliferation
rate
high
COL
incorporation
cross-linking.
grafts
studied
did
not
lead
haemolysis.
Therefore,
good
properties,
hydrophilicity,
anticoagulation
could
enhance
proliferation.
ACS Sustainable Chemistry & Engineering,
Journal Year:
2023,
Volume and Issue:
12(2), P. 938 - 946
Published: Dec. 29, 2023
The
direct
utilization
of
CO2
by
electroreduction
is
a
promising
route
to
achieve
valuable
chemicals
and
realizing
negative
carbon
cycle.
Nanostructured
Bi-based
materials
have
attracted
large
attention
due
their
multiple
advantages,
however,
the
influence
metal
leaching
in
modulating
catalytic
performance
remains
unclear.
Herein,
Ce
taken
as
typical
example
study
structural
regulation
Bi2O3-derived
electrocatalyst
for
reduction.
postcharacterizations
prove
sites
during
situ
formation
active
crystal
plane
leaching-derived
Bi
nanosheets
(CLD-Bi
Ns).
As
result,
Faradaic
efficiency
(FE)
formate
maintains
over
95%
wide
potential
range
−0.5
−1.0
V
CLD-Bi
Ns
catalyst,
along
with
high
current
density
272.6
mA
cm–2
at
−0.8
versus
RHE
flow
cell.
FT-IR
confirms
appearance
key
*OCHO
species
continuously
applied
potentials,
DFT
calculation
demonstrates
optimized
free
energy
*HCOOH
intermediates
on
(012)
sample,
resulting
improved
performance.
This
work
provides
an
effective
strategy
improve
other
electroreduction.
