ACS Applied Materials & Interfaces,
Journal Year:
2023,
Volume and Issue:
15(16), P. 20081 - 20088
Published: March 29, 2023
The
realization
of
commercialization
proton
electrolyte
membrane
water
splitting
technology
significantly
depends
on
the
anodic
electrocatalyst
working
at
a
high
potential
and
strong
acidic
conditions
requiring
superior
oxygen
evolution
reaction
activity
stability.
In
this
work,
we
devise
construction
ultrasmall
Pd@Ir
core-shell
nanoparticles
(5
nm)
with
atomic
layer
Ir
(3
layers)
carbon
nanotubes
(Pd@Ir/CNT)
as
an
exceptional
bifunctional
in
splitting.
Due
to
structure,
strain
generated
heterointerfaces
leads
upshifted
d
band
center
atoms
contributing
62-fold
better
mass
1.63
V
vs
RHE
than
commercial
IrO2;
besides,
electronic
hybridization
suppresses
electrochemical
dissolution
Ir;
result,
robust
stability
is
also
achieved.
hydrogen
catalysis,
Pd@Ir/CNT
exhibits
3.7
times
higher
Pt/C.
Furthermore,
only
1.7
required
reach
current
density
100
mA
cm-2,
251
mV
lower
that
Pt/C-IrO2,
indicating
its
superiority
Chemical Reviews,
Journal Year:
2024,
Volume and Issue:
124(7), P. 3694 - 3812
Published: March 22, 2024
Electrocatalytic
water
splitting
driven
by
renewable
electricity
has
been
recognized
as
a
promising
approach
for
green
hydrogen
production.
Different
from
conventional
strategies
in
developing
electrocatalysts
the
two
half-reactions
of
(e.g.,
and
oxygen
evolution
reactions,
HER
OER)
separately,
there
growing
interest
designing
bifunctional
electrocatalysts,
which
are
able
to
catalyze
both
OER.
In
addition,
considering
high
overpotentials
required
OER
while
limited
value
produced
oxygen,
is
another
rapidly
exploring
alternative
oxidation
reactions
replace
hybrid
toward
energy-efficient
generation.
This
Review
begins
with
an
introduction
on
fundamental
aspects
splitting,
followed
thorough
discussion
various
physicochemical
characterization
techniques
that
frequently
employed
probing
active
sites,
emphasis
reconstruction
during
redox
electrolysis.
The
design,
synthesis,
performance
diverse
based
noble
metals,
nonprecious
metal-free
nanocarbons,
overall
acidic
alkaline
electrolytes,
thoroughly
summarized
compared.
Next,
their
application
also
presented,
wherein
anodic
include
sacrificing
agents
oxidation,
pollutants
oxidative
degradation,
organics
upgrading.
Finally,
concise
statement
current
challenges
future
opportunities
presented
hope
guiding
endeavors
quest
sustainable
Nature Communications,
Journal Year:
2024,
Volume and Issue:
15(1)
Published: Feb. 16, 2024
Abstract
Exploring
an
active
and
cost-effective
electrocatalyst
alternative
to
carbon-supported
platinum
nanoparticles
for
alkaline
hydrogen
evolution
reaction
(HER)
have
remained
elusive
date.
Here,
we
report
a
catalyst
based
on
single
atoms
(SAs)
doped
into
the
hetero-interfaced
Ru/RuO
2
support
(referred
as
Pt-Ru/RuO
),
which
features
low
HER
overpotential,
excellent
stability
distinctly
enhanced
cost-based
activity
compared
commercial
Pt/C
Ru/C
in
1
M
KOH.
Advanced
physico-chemical
characterizations
disclose
that
sluggish
water
dissociation
is
accelerated
by
RuO
while
Pt
SAs
metallic
Ru
facilitate
subsequent
H*
combination.
Theoretical
calculations
correlate
with
experimental
findings.
Furthermore,
only
requires
1.90
V
reach
A
cm
−2
delivers
high
price
anion
exchange
membrane
electrolyzer,
outperforming
benchmark
Pt/C.
This
research
offers
feasible
guidance
developing
noble
metal-based
catalysts
performance
cost
toward
practical
H
production.
Small,
Journal Year:
2022,
Volume and Issue:
18(47)
Published: Oct. 3, 2022
Herein,
the
authors
produce
Co-based
(Co3
(PO4
)2
,
Co3
O4
and
Co9
S8
)
electrocatalysts
via
pulsed
laser
ablation
in
liquid
(PLAL)
to
explore
synergy
of
anion
modulation
on
phase-selective
active
sites
electrocatalytic
hydrogen
evolution
reaction
(HER)
oxygen
(OER).
displays
an
ultralow
overpotential
230
mV
at
10
mA
cm-2
with
48.5
dec-1
Tafel
slope
that
outperforms
state-of-the-art
Ir/C
OER
due
its
high
intrinsic
activity.
Meanwhile,
exhibits
highest
HER
performance
known
among
synthesized
catalysts,
showing
lowest
361
95.8
alkaline
medium
producing
H2
gas
≈500
mmol
g-1
h-1
yield
rate
under
-0.45
V
versus
RHE.
The
identified
surface
reactive
intermediates
over
situ
electrochemical-Raman
spectroscopy
reveal
cobalt(hydr)oxides
higher
oxidation
states
Co-cation
forming
oxidizing
potentials
electrode-electrolyte
facilitate
OER,
while
Co(OH)2
HER.
Notably,
fabricated
two-electrode
electrolyzers
using
deliver
cell
≈2.01,
2.11,
1.89
V,
respectively,
.
This
work
not
only
shows
PLAL-synthesized
as
promising
candidates
for
water
splitting,
but
also
provides
underlying
principle
advanced
energy-conversion
catalysts
beyond.
Advanced Functional Materials,
Journal Year:
2022,
Volume and Issue:
32(44)
Published: Sept. 4, 2022
Abstract
BiVO
4
has
attracted
wide
attention
for
oxygen‐evolution
photoanodes
in
water‐splitting
photoelectrochemical
devices.
However,
its
performance
is
hampered
by
electron‐hole
recombination
at
surface
states.
Herein,
partially
oxidized
two‐dimensional
(2D)
bismuthene
developed
as
an
effective,
stable,
functional
interlayer
between
and
the
archetypal
NiFeOOH
co‐catalyst.
Comprehensive
(photo)electrochemical
photovoltage
characterizations
show
that
can
effectively
increase
lifetime
of
photogenerated
holes
passivating
hole
trap
states
;
however,
it
limited
influencing
electron
related
to
oxygen
vacancies
(
V
O
).
Loading
on
increases
density
are
beneficial
evolution
reaction
via
formation
oxy/hydroxyl‐based
water
oxidation
intermediates
surface.
Moreover,
interfacial
band
bending
fills
‐related
traps,
leading
more
efficient
charge
extraction.
With
synergistic
interaction
,
this
composite
photoanode
achieves
a
5.8‐fold
photocurrent
compared
bare
reaching
stable
3.4
(±0.2)
mA
cm
–2
low
bias
+0.8
RHE
or
4.7(±0.2)
+1.23
.
The
use
2D
provides
new
strategy
enhance
photoanodes.
