ACS Catalysis,
Journal Year:
2024,
Volume and Issue:
14(14), P. 10871 - 10881
Published: July 4, 2024
Sluggish
mass
transfer
of
OH–
in
alkaline
oxygen
evolution
reaction
(OER),
resulting
from
densely
packed
hydrated
layers
at
the
outer
Helmholtz
plane
(OHP),
becomes
one
main
bottlenecks
to
improve
overall
efficiency
electrochemical
devices.
Herein,
we
report
a
hydration-layer-destabilizing
route
by
binding
formate
oxyanions
onto
catalyst
surface
form
transport
pathways,
favorable
for
fast
and
significantly
improving
OER
activity.
The
experiments
indicate
that
formate-modified
NiCo
hydroxide
(NiCo–HCOO–)
shows
increased
kinetics,
smaller
overpotential,
higher
turnover
frequency
(TOF)
than
without
modification.
theoretical
calculations
reveal
formate-induced
hydrogen-bonding
interaction
with
water
molecules
could
destabilize
potassium
ion
OHP,
lowering
resistance
paving
pathway
transfer.
assembled
flow
electrolyzer
NiCo–HCOO–
anode
operate
400
mA
cm–2
only
2.1
V
over
300
h.
This
study
provides
an
efficient
strategy
designing
high-activity
electrocatalysts
toward
advanced
energy
conversion
Small,
Journal Year:
2024,
Volume and Issue:
20(34)
Published: April 10, 2024
Abstract
Single‐component
electrocatalysts
generally
lead
to
unbalanced
adsorption
of
OH
−
and
urea
during
oxidation
reaction
(UOR),
thus
obtaining
low
activity
selectivity
especially
when
oxygen
evolution
(OER)
competes
at
high
potentials
(>1.5
V).
Herein,
a
cross‐alignment
strategy
in
situ
vertically
growing
Ni(OH)
2
nanosheets
on
2D
semiconductor
g‐C
3
N
4
is
reported
form
hetero‐structured
electrocatalyst.
Various
spectroscopy
measurements
including
experiments
indicate
the
existence
enhanced
internal
electric
field
interfaces
vertical
nanosheets,
favorable
for
balancing
intermediates.
This
heterojunction
electrocatalyst
shows
high‐selectivity
UOR
compared
pure
,
even
V)
large
current
density.
The
computational
results
show
could
steer
increase
urea,
efficiently
avoiding
poisoning
strongly
adsorbed
active
sites.
A
membrane
electrode
assembly
(MEA)‐based
electrolyzer
with
anode
operate
an
industrial‐level
density
200
mA
cm
−2
.
work
paves
avenue
designing
high‐performance
by
cross‐alignments
components.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(40)
Published: April 12, 2024
Abstract
Seawater
hydrogen
production,
vital
for
sustainable
energy
solutions
and
freshwater
preservation,
faces
challenges
due
to
seawater
complexity
high
consumption.
A
strategy
modulate
dehydrogenation
kinetics
of
dual‐phase
metal
nitrides
using
low‐loaded
Pt
quantum
dots
(QDs),
achieving
stable
energy‐efficient
generation
is
introduced.
The
QDs@Ni
3
N‐MoN/Ti
catalyst
displays
outstanding
bifunctional
catalytic
performance,
enabling
efficient
production
hydrazine
degradation
in
a
flow
anion
exchange
membrane
water
electrolysis
(AEMWE)
device.
Operating
at
low
voltage
1.41
V,
it
achieves
2
cm
−2
300
h,
circumventing
chlorine
corrosion
yielding
record‐breaking
equivalent
input
(2.68
kWh
m
−3
H
1
),
47.1%
reduction
compared
traditional
methods.
Integration
with
solar
biomass
facilitates
self‐powered
hybrid
highlighting
its
potential
applications.
This
work
marine
resource
conversion
green
offers
viable
insights
into
industrial
hazardous
pollutant
metal‐nitride
electrocatalysts.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(40)
Published: Aug. 11, 2024
Abstract
Electrocatalytic
water
splitting
for
hydrogen
production
still
faces
a
bottleneck
due
to
sluggish
reactive
kinetics
and
high
energy
barriers.
Herein,
p–d
orbital
coupling
P–Fe
heterosites
are
constructed
at
Ni
2
P–FeNi‐LDH
interfaces
enhance
the
O─H
bond
cleavage
of
reaction
intermediates
H
O*
OH*
oxygen
evolution
(OER)
(HER),
respectively.
The
P/NiFe‐LDH
heterostructure
shows
superior
HER
OER
activities
alkaline
with
overpotentials
230
270
mV
100
mA
cm
−2
,
respectively,
even
exhibits
activity
electrocatalytic
seawater
splitting.
interaction
P
2p
Fe
3d
orbitals
upshifts
d‐band
center
downshifts
p‐band
P.
This
finding
not
only
facilitates
dissociation
bonds
in
O
promotes
Volmer–Heyrovsky
step
HER,
but
also
reduces
barrier
rate‐determining
from
transition.
work
proposes
new
approach
constructing
heterojunctions
facilitate
reduce
electrocatalysis.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(46)
Published: Aug. 6, 2024
Abstract
The
rational
manipulation
of
the
surface
reconstruction
catalysts
is
a
key
factor
in
achieving
highly
efficient
water
oxidation,
but
it
challenge
due
to
complex
reaction
conditions.
Herein,
we
introduce
novel
situ
strategy
under
gradient
magnetic
field
form
catalytically
active
species
on
ferromagnetic/paramagnetic
CoFe
2
O
4
@CoBDC
core–shell
structure
for
electrochemical
oxygen
evolution
(OER).
We
demonstrate
that
Kelvin
force
from
cores’
local
modulates
shells’
reconstruction,
leading
higher
proportion
Co
2+
as
sites.
These
sites
with
optimized
electronic
configuration
exhibit
more
favorable
adsorption
energy
oxygen‐containing
intermediates
and
lower
activation
overall
catalytic
reaction.
As
result,
significant
enhancement
OER
performance
achieved
large
current
density
increment
about
128
%
at
1.63
V
an
overpotential
reduction
by
28
mV
10
mA
cm
−2
after
reconstruction.
Interestingly,
removing
external
field,
activity
could
persist
over
100
h.
This
work
showcases
directional
enhanced
oxidation.
Nature Communications,
Journal Year:
2024,
Volume and Issue:
15(1)
Published: Nov. 22, 2024
The
development
of
efficient
and
robust
catalysts
for
hydrogen
evolution
reaction
is
crucial
advancing
the
economy.
In
this
study,
we
demonstrate
that
ultra-low
coordinated
hollow
PtRuNi-Ox
nanocages
exhibit
superior
catalytic
activity
stability
across
varied
conditions,
notably
surpassing
commercial
Pt/C
catalysts.
Notably,
achieve
current
densities
10
mA
cm−2
at
only
19.6
±
0.1,
20.9
21.0
0.1
mV
in
alkaline
freshwater,
chemical
wastewater,
seawater,
respectively,
while
maintaining
satisfied
with
minimal
loss
after
40,000
cycles.
situ
experiments
theoretical
calculations
reveal
coordination
Pt,
Ru,
Ni
atoms
creates
numerous
dangling
bonds,
which
lower
water
dissociation
barrier
optimizing
adsorption.
This
research
marks
a
notable
advancement
precise
engineering
atomically
dispersed
multi-metallic
centers
energy-related
applications.
Efficient
are
key
to
economy,
particularly
reaction.
Here,
authors
report
offer
comparable
performance
both
freshwater
wastewater
conditions.
Nano Letters,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 16, 2025
Efficient
oxygen
evolution
reaction
(OER)
catalysts
with
fast
kinetics,
high
efficiency,
and
stability
are
essential
for
scalable
green
production
of
hydrogen.
The
rational
design
fabrication
play
a
decisive
role
in
their
catalytic
behavior.
This
work
presents
high-entropy
catalyst,
FeCoNiCuMo-O,
synthesized
via
carbothermal
shock.
Synergistic
optimization
the
adsorption
mechanism
(AEM)
lattice
(LOM)
was
realized
demonstrated
through
combination
situ
spectra/mass
spectrometry
chemical
probe
analysis
FeCoNiCuMo-O.
Furthermore,
robust
is
reinforced
by
inherent
properties
conferred
design.
catalyst
exhibits
outstanding
performance
metrics,
featuring
an
exceptionally
low
Tafel
slope
41
mV
dec–1,
overpotential
272
at
10
mA
cm–2,
commendable
endurance
(a
mere
2.2%
voltage
decline
after
240-h
continuous
chronopotentiometry
test
cm–2).
study
advances
development
efficient,
durable
OER
electrocatalysts
sustainable
hydrogen
production.
