Nanoscale,
Journal Year:
2022,
Volume and Issue:
14(48), P. 17908 - 17920
Published: Jan. 1, 2022
Due
to
their
affordability
and
good
catalytic
activity
for
oxygen
reactions,
MOF-derived
carbon
composites
containing
metal
alloys
have
piqued
interest.
However,
during
synthesis,
MOFs
the
disadvantage
of
causing
significant
evaporation,
resulting
in
a
reduction
active
sites
durability.
This
study
proposes
tailoring
molecular
structure
by
optimizing
bipyridine
flexible
4-aminodiacetic
terephthalic
acid
ligands,
which
numerous
coordination
modes
framework
structures,
fascinating
architectures.
MOF
frameworks
having
optimized
N
O
units
are
coordinated
with
Co
Ni
ions
provide
precursors
that
annealed
at
700
°C
argon.
The
Co9S8/Co-Nx/CoNi/Ni3S2@CNS-4
catalyst
exhibits
excellent
activity,
revealing
an
ORR
half-wave
potential
0.86
V
overpotential
(OER)
196
mV
10
mA
cm-2,
gap
0.72
Tafel
slope
79
dec-1.
proposed
strategy
allows
rational
design
N-coordinated
CoNi
attached
ultrathin
N,
S
co-doped
graphitic
sheets
enhance
bifunctional
sufficient
sites.
Consequently,
zinc-air
battery
using
synthesized
shows
high
peak
power
density
206.9
mW
cm-2
(Pt/C
+
RuO2
116.1
cm-2),
small
polarization
voltage
0.96
after
370
h
outstanding
durability
over
2400
cycles
(400
h).
key
contributions
superior
performance
synergetic
effects
plus
N,S-incorporated
skeleton,
due
charge
transfer
resistances
enhanced
CoNi,
metal-S,
pyridinic
N.
Energy & environment materials,
Journal Year:
2022,
Volume and Issue:
6(5)
Published: May 28, 2022
Electrochemical
water
splitting
represents
one
of
the
most
promising
technologies
to
produce
green
hydrogen,
which
can
help
realize
goal
achieving
carbon
neutrality.
While
substantial
efforts
on
a
laboratory
scale
have
been
made
for
understanding
fundamental
catalysis
and
developing
high‐performance
electrocatalysts
two
half‐reactions
involved
in
electrocatalysis,
much
less
attention
has
paid
doing
relevant
research
larger
scale.
For
example,
few
such
researches
done
an
industrial
Herein,
we
review
very
recent
endeavors
bridge
gaps
between
applications
electrolysis.
We
begin
by
introducing
fundamentals
electrochemical
then
present
comparisons
testing
protocol,
figure
merit,
catalyst
interest,
manufacturing
cost
industry‐based
water‐electrolysis
research.
Special
is
tracking
surface
reconstruction
process
identifying
real
catalytic
species
under
different
conditions,
highlight
significant
distinctions
corresponding
mechanisms.
Advances
designs
industry‐relevant
electrolysis
are
also
summarized,
reveal
progress
moving
practical
forward
accelerating
synergies
material
science
engineering.
Perspectives
challenges
electrocatalyst
design
strategies
proposed
finally
further
lab‐scale
large‐scale
electrocatalysis
applications.
The Journal of Physical Chemistry C,
Journal Year:
2023,
Volume and Issue:
128(1), P. 85 - 94
Published: Dec. 27, 2023
A
series
of
CdS
quantum
dots
(QDs)
at
low
temperature
were
grown
on
the
nanosheets
(NSs)
g-C3N4
through
an
in
situ
successive
ionic
layer
adsorption
and
reaction
process.
The
visible
light
active
band
gap
ultrathin
NSs
has
attracted
more
attention
due
to
its
essential
bandgap
for
water
splitting
reaction.
However,
a
single
catalyst
with
limited
number
sites
does
not
exhibit
significant
photo/electrocatalytic
activity
hydrogen
production.
In
current
strategies,
development
photogenerated
charge
transfer-driven
type-II
QDs/g-C3N4
heterostructure
demonstrates
enhanced
evolution
amount
14.8
mmol
gcat–1
H2
gas
AQY
27.6%
as
result
decreased
transfer
resistance
significantly
increased
electrochemical
surface
area.
Additionally,
as-prepared
shown
overpotentials
182
382
mV
(HER)
oxygen
(OER)
reactions
reach
density
10
mA
cm–2,
respectively.
addition,
bifunctional
electrocatalyst
exhibits
4-
6-fold
higher
mass
material
OER
HER
compared
g-C3N4,
considerable
faradaic
efficiency
under
potentiostatic
system,
Moreover,
remarkable
was
well
explained
photoluminescence
quenching
effect
Mott–Schottky
analysis.
ACS Catalysis,
Journal Year:
2023,
Volume and Issue:
13(7), P. 4799 - 4810
Published: March 24, 2023
Layered
double
hydroxides
(LDHs)
are
promising
catalysts
for
the
oxygen
evolution
reaction
(OER)
given
their
modular
chemistry
and
ease
of
synthesis.
Herein,
we
report
a
facile
strategy
inclusion
vacancies
(VO)
using
Ce
as
promoter
in
Co–Ni
LDHs
that
significantly
enhances
activity
OER.
In
situ
X-ray
absorption
spectroscopy
(XAS)
uncovers
an
increase
octahedral
Co
sites
VO
upon
addition
promotes
transformation
LDH
into
oxyhydroxide-reactive
phase
more
readily.
The
presence
OER-active
oxyhydroxide
along
with
generation
facilitated
by
partial
reduction
Ce4+
to
Ce3+
under
oxidizing
conditions
results
better
electrochemical
Ce-doped
electrocatalysts.
Density
functional
theory
calculations
further
corroborate
XAS
experimental
findings
showcasing
both
reduces
free-energy
barrier
rate-limiting
OH*
deprotonation
step
during
This
work
showcases
how
enhanced
understanding
role
promoters
electrocatalysts
can
provide
insights
future
catalyst
design
anodic
reactions.
ACS Sustainable Chemistry & Engineering,
Journal Year:
2023,
Volume and Issue:
11(8), P. 3219 - 3227
Published: Feb. 16, 2023
Hydrazine
oxidation
assisting
water
splitting
is
considered
as
a
promising
strategy
toward
the
highly
efficient
and
energy-saving
hydrogen
acquirement.
However,
development
of
stable
electrocatalysts
for
hydrazine
hydrate
(HzOR)
well
evolution
reaction
(HER)
still
remains
challenging.
In
this
study,
an
interface-coupled
Co(OH)2/MoS2
nanosheet
array
designed
to
form
synergistic
hierarchical
heterostructure
on
carbon
cloth
substrate,
which
shown
have
superior
bifunctional
performance
HzOR/HER
under
alkaline
conditions.
Benefiting
from
abundant
electrocatalytic
active
sites
improved
kinetics,
Co(OH)2/MoS2/CC
electrode
shows
performances
with
low
potentials
−134
177
mV
at
100
mA
cm–2
HER
HzOR,
respectively.
For
hydrazine-assisted
overall
electrolyzer
system
(OHzS),
delivers
142,
197,
271
realize
10,
50,
cm–2,
proves
potential
application
in
large-scale
preparation
fuel.
This
put
forward
simple
way
robust
economic
electrodes
energy-related
systems.
