Hierarchical
carbon
skeletons
derived
from
natural
wood
can
be
employed
as
the
substrates
to
fabricate
self-supported
catalysts.
The
typically
three
sections
(cross
section,
radial
and
tangential
section)
of
would
significantly
affect
electrocatalytic
performance.
Therefore,
correlations
between
anisotropy
structure
hierarchical
oxygen
evolution
reaction
(OER)
performances
was
systematically
investigated.
cross-sectional
wood-derived
decorated
with
Co
nanoparticles
requires
an
overpotential
370
mV
deliver
50
mA
cm-2
superior
those
radial-sectional
tangential-sectional
counterparts.
cross-section
possesses
more
shorts
pore
channels
than
radial-section
tangential-section,
accelerating
release
achieving
improved
OER
activity.
This
work
highlights
critical
contribution
in
promoting
properties
provides
a
new
paradigm
for
designing
advanced
electrocatalysts.
Small,
Journal Year:
2024,
Volume and Issue:
unknown
Published: May 25, 2024
Developing
low-cost
and
highly
efficient
bifunctional
catalysts
for
both
the
oxygen
evolution
reaction
(OER)
hydrogen
(HER)
is
a
challenging
problem
in
electrochemical
overall
water
splitting.
Here,
iron,
tungsten
dual-doped
nickel
sulfide
catalyst
(Fe/W-Ni
ACS Sustainable Chemistry & Engineering,
Journal Year:
2024,
Volume and Issue:
12(11), P. 4551 - 4564
Published: March 1, 2024
A
metal–organic
framework
(MOF)
embedded
by
transition
metal
sulfide
(TMS)
particles
is
one
of
the
promising
electrocatalyst
candidates
for
overall
water
splitting
(OWS)
due
to
large
surface
area
and
abundant
active
sites
from
MOF
precursor,
as
well
tunable
electronic
structure
higher
intrinsic
conductivity
TMS.
More
importantly,
its
self-restructuring
under
alkaline
conditions
will
lead
chemical
composition
phase
evolution
catalyst
surface,
which
source
further
enhanced
catalytic
activity.
semi-MOF
(labeled
Co@Ni/Fe-MS/MOF)
with
semisacrificial
template
a
TMS
particle
guest
was
designed
exercisable
universal
heteroatomic
Co
doping
partial
vulcanization.
The
TMS/MOF
heterostructure
establishes
an
ideal
bridge
electron
transfer.
Simultaneously,
dopant
synergistic
effect
multiple
also
effectively
regulate
charge
environment
around
sites,
jointly
improve
adsorption/desorption
kinetics
reaction
intermediates.
As
result,
Co@Ni/Fe-MS/MOF
exhibits
distinguished
overpotential
(η10
=
229
mV
OER,
η10
174
HER)
Tafel
slope
(52.37/114.35
dec–1
OER/HER),
unrivaled
long-term
durability
(80
h
OWS).
Moreover,
two-electrode
∥
cell
illustrates
small
voltage
1.54
V
achieve
power
10
mA
cm–2.
Impressively,
this
superior
OER
property
comes
three-layer
sandwich
restructured
hybrid
semi-MOFs
in
true
sites.
This
work
aspired
catalyst,
induce
effects,
shed
light
on
preparation
materials
heterogeneous
interface
engineering,
evolution.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(32)
Published: April 3, 2024
Abstract
Developing
highly
active
and
stable
electrocatalysts
is
essential
for
the
large‐scale
production
of
hydrogen
from
alkaline
water.
In
this
work,
Ag
single
atoms
nanoparticles
co‐decorated
Co
hydro(oxy)oxide
(Ag
SAs&NPs@CoO(O)H)
synthesized
by
a
facile
one‐step
approach.
Notably,
overpotential
SAs&NPs@CoO(O)H
200
mV
at
current
density
50
mA
cm
−2
during
oxygen
evolution
reaction
(OER).
Meanwhile,
it
can
display
mass
activity
637.47
A
g
−1
under
300
mV,
which
212.49
times
higher
than
that
commercial
IrO
2
.
Moreover,
assembled
Pt/C
//
system
only
requires
1.9
V
to
reach
an
industrial
1000
in
water
electrolyzer
exhibits
excellent
stability
large
Furthermore,
situ
Raman
spectroscopy
analysis
coupled
with
theoretical
calculations
reveals
novel
site
switching
mechanism
found
on
SAs&NPs@CoO(O)H.
Specifically,
O*
preferentially
generates
NPs
then
switches
toward
3+
CoO(O)H
produce
OOH*
O
SAs
lattice
exert
inhibitory
force
reconstruction
process
CoOOH
Co(OH)
,
resulting
anti‐dissolution
stability.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 30, 2024
Abstract
Oxygen
electrocatalysis,
as
the
pivotal
circle
of
many
green
energy
technologies,
sets
off
a
worldwide
research
boom
in
full
swing,
while
its
large
kinetic
obstacles
require
remarkable
catalysts
to
break
through.
Here,
based
on
summarizing
reaction
mechanisms
and
situ
characterizations,
structure–activity
relationships
oxygen
electrocatalysts
are
emphatically
overviewed,
including
influence
geometric
morphology
chemical
structures
electrocatalytic
performances.
Subsequently,
experimental/theoretical
is
combined
with
device
applications
comprehensively
summarize
cutting‐edge
according
various
material
categories.
Finally,
future
challenges
forecasted
from
perspective
catalyst
development
applications,
favoring
researchers
promote
industrialization
electrocatalysis
at
an
early
date.
ACS Catalysis,
Journal Year:
2024,
Volume and Issue:
14(10), P. 7907 - 7916
Published: May 6, 2024
Electrochemical
nitrate
reduction
(NO3RR)
offers
an
ecofriendly
way
for
ammonia
production.
However,
improving
the
sluggish
kinetics
of
such
a
multistep
reaction
still
remains
challenging.
Herein,
asymmetry
strategy
is
proposed
to
adjust
charge
distribution
active
centers
on
metallene
by
presenting
novel
symmetry-broken
medium-entropy-alloy
(MEA)
via
heteroatom
alloying.
Benefiting
from
maximized
exposure
well-regulated
sites,
proof-of-concept
PdCuCo
MEA
delivers
near
100%
NH3
Faradaic
efficiency
in
both
neutral
and
alkaline
electrolytes,
along
with
record-high
yield
rate
over
532.5
mg
h–1
mgcat–1.
Moreover,
it
enables
99.7%
conversion
industrial
wastewater
level
6200
ppm
drinkable
water
level.
Detailed
studies
further
revealed
that
redistribution
induced
elemental
electronegativity
difference
metallene,
which
will
weaken
N–O
bond
*NO,
thus
reducing
energy
barrier
rate-determining
step.
Meanwhile,
competitive
HER
formation
NO2–
are
also
hindered.
We
believe
our
this
work
shed
light
design
efficient
NO3RR
catalysts
more
practical
Small,
Journal Year:
2024,
Volume and Issue:
20(26)
Published: Feb. 5, 2024
Abstract
Rational
design
of
heterostructure
catalysts
through
phase
engineering
strategy
plays
a
critical
role
in
heightening
the
electrocatalytic
performance
catalysts.
Herein,
novel
amorphous/crystalline
(a/c)
(a‐CoS/Ni
3
S
2
)
is
manufactured
by
facile
hydrothermal
sulfurization
method.
Strikingly,
interface
coupling
between
amorphous
(a‐CoS)
and
crystalline
(Ni
a‐CoS/Ni
much
stronger
than
that
(c‐CoS)
crystalline/crystalline
(c/c)
(c‐CoS/Ni
as
control
sample,
which
makes
meta‐stable
structure
more
stable.
Meanwhile,
has
vacancies
(S
v
c‐CoS/Ni
because
presence
an
phase.
Eventually,
for
oxygen
evolution
reaction
(OER),
exhibits
significantly
lower
overpotential
192
mV
at
10
mA
cm
−2
compared
to
(242
mV).
An
exceptionally
low
cell
voltage
1.51
V
required
achieve
current
density
50
overall
water
splitting
assembled
||
Pt/C).
Theoretical
calculations
reveal
charges
transfer
from
a‐CoS
Ni
,
promotes
enhancement
OER
activity.
This
work
will
bring
into
play
fabrication
a/c
understanding
catalytic
mechanism
heterostructures.
