ACS Applied Materials & Interfaces,
Journal Year:
2023,
Volume and Issue:
15(12), P. 15533 - 15544
Published: March 15, 2023
The
rational
design
of
highly
efficient
and
stable
electrocatalysts
for
the
oxygen
evolution
reaction
(OER)
is
an
urgent
need
but
remains
challenging
various
sustainable
energy
systems.
How
to
adjust
atomic
structure
electronic
active
center
a
key
bottleneck
problem.
Accelerating
electron
transfer
process
deep
self-reconstruction
sites
could
be
cost-effective
strategy
toward
electrocatalytic
OER
catalyst
development.
Here,
crystalline-amorphous
(c-a)
coupled
Ni3S2/NiPx
electrocatalyst
self-supported
on
nickel
foam
with
intimate
interface
was
developed
via
feasible
solvothermal-electrochemistry
method.
coupling
crystalline
high
conductivity
amorphous
numerous
potential
regulate
optimize
adsorption/desorption
O-containing
species,
ultimately
resulting
in
catalytic
performance.
obtained
Ni3S2/NiPx/NF
presents
low
overpotential
265
mV
obtain
10
mA·cm-2
small
Tafel
slope
51.6
mV·dec-1.
Also,
exhibited
significantly
enhanced
long-term
stability
compared
other
two
catalysts,
<5%
decay
activity
over
20
h
continuous
operation,
while
that
Ni3S2/NF
NiPx/NF
decreased
by
about
30
50%,
respectively.
This
study
provides
inspiration
conversion
reactions
optimizing
performance
catalysts
structures.
Proceedings of the National Academy of Sciences,
Journal Year:
2022,
Volume and Issue:
119(18)
Published: April 27, 2022
SignificanceSeawater
is
one
of
the
most
abundant
resources
on
Earth.
Direct
electrolysis
seawater
a
transformative
technology
for
sustainable
hydrogen
production
without
causing
freshwater
scarcity.
However,
this
severely
impeded
by
lack
robust
and
active
oxygen
evolution
reaction
(OER)
electrocatalysts.
Here,
we
report
highly
efficient
OER
electrocatalyst
composed
multimetallic
layered
double
hydroxides,
which
affords
superior
catalytic
performance
long-term
durability
high-performance
electrolysis.
To
best
our
knowledge,
catalyst
among
it
advances
development
technology.
ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(7), P. 8939 - 8948
Published: Feb. 9, 2024
Transition
metal
metaphosphates
and
noble
phosphides
prepared
under
similar
conditions
are
potential
hybrid
catalysts
for
electrocatalytic
water
splitting,
which
is
of
great
significance
H2
production.
Herein,
the
structure
activity
different
species
(i.e.,
Rh,
Pd,
Ir)
on
CoNiP4O12
nanoarrays
have
been
systematically
studied.
Due
to
formation
energies
phosphides,
Rh
(RhPx)
Pd
(PdPx)
as
well
Ir
obtained
same
phosphorylation
perspectively.
RhPx/CoNiP4O12
PdPx/CoNiP4O12
exhibit
much
better
HER
than
Ir/CoNiP4O12
due
advantages
phosphides.
Density
functional
theory
(DFT)
calculations
reveal
that
extraordinary
originated
from
strong
affinity
H2O
optimal
adsorption
H*.
The
best
only
requires
a
low
overpotential
30
234
mV
deliver
10
mA
cm–2
OER,
respectively,
therefore
effective
overall
splitting
(requiring
1.57
V
achieve
current
density
cm–2).
This
work
not
develops
novel
electrocatalyst
but
also
provides
deep
insight
into
mechanism
ACS Nano,
Journal Year:
2022,
Volume and Issue:
16(12), P. 21518 - 21526
Published: Dec. 7, 2022
Ni-based
materials
are
auspicious
electrocatalysts
for
5-hydroxymethylfurfural
oxidation
reaction
(HMFOR),
including
the
adsorption
and
conversion
of
HMF
OHad
on
electrocatalyst
surface.
However,
intrinsic
HMFOR
activity
catalysts
is
far
from
satisfactory
due
to
weak
species.
Herein,
a
set
PtxNi100-x
bundle
nanowires
(NWs)
were
prepared
HMFOR,
which
enables
low
onset-potential
large
current
density.
Operando
methods
reveal
that
Pt
modulates
redox
property
Ni
in
PtNi
NWs
accelerates
Ni2+-OH
Ni3+-O
species
during
HMFOR.
Moreover,
studies
demonstrate
synergetic
roles
enhancing
by
forming
Pt-O-Ni
bonds.
In
detail,
atoms
modulate
d
band
alter
behavior
HMF.
promote
sites.
This
work
provides
design
principles
modulating
behaviors
organic
molecules
OHad.
Advanced Functional Materials,
Journal Year:
2023,
Volume and Issue:
33(25)
Published: March 10, 2023
Abstract
Oxygen
evolution
reaction
(OER)
is
the
anodic
half‐reaction
for
crucial
energy
devices,
such
as
water
electrolysis,
metal–air
battery,
and
electrochemical
CO
2
reduction.
Fe‐based
materials
are
recognized
one
of
most
promising
electrocatalysts
OER
because
its
extremely
low
price
high
activity.
In
particular,
iron
oxyhydroxide
(FeOOH)
not
only
highly
active
toward
OER,
but
also
widely
accepted
true
species
plenty
converted
into
FeOOH
during
test.
Herein,
recent
advances
FeOOH‐based
nano‐structure
application
in
reviewed.
The
relationship
between
structure
catalytic
performance,
followed
by
introduction
current
strategies
enhancing
activity
(i.e.,
crystalline
phase
engineering,
element
doping,
construction
hybrid
materials)
mainly
focused.
Finally,
a
summary
perspective
about
remaining
challenges
future
opportunities
this
area
further
design
provided.