Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 15, 2024
Abstract
Urea
oxidation
reaction
(UOR)
is
an
ideal
alternative
to
oxygen
evolution
(OER)
for
efficient
hydrogen
production
but
immensely
plagued
by
slow
kinetics.
Herein,
a
multilayer
hole
amorphous
boron‐nickel
catalyst
(a‐NiB
x
)
fabricated
through
simple
chemical
plating
method,
which
displays
intriguing
catalytic
activity
toward
UOR,
demanding
low
working
potential
of
1.4
V
reach
100
mA
cm
−2
.
The
high
performance
credited
the
formation
metaborate
(BO
2
−
),
can
promote
high‐oxidation‐state
NiOOH
active
phase
and
optimize
adsorption
urea
molecules.
This
be
confirmed
operando
spectroscopy
characteristics
density
functional
theory
calculations.
Consequently,
assembled
electrolyzer
utilizing
NiB
as
bifunctional
catalysts
exhibited
splendid
activity,
requiring
evidently
lower
voltage
1.66
current
1.57
when
using
Pt/C
cathode
catalyst.
Moreover,
secured
robust
stability
over
200
h,
well
four
times
higher
rate
than
traditional
water
electrolysis.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
36(28)
Published: April 26, 2024
High-entropy
alloy
nanoparticles
(HEAs)
show
great
potential
in
emerging
electrocatalysis
due
to
their
combination
and
optimization
of
multiple
elements.
However,
synthesized
HEAs
often
exhibit
a
weak
interface
with
the
conductive
substrate,
hindering
applications
long-term
catalysis
energy
conversion.
Herein,
highly
active
durable
electrocatalyst
composed
quinary
(PtNiCoFeCu)
encapsulated
inside
activated
carbonized
wood
(ACW)
is
reported.
The
self-encapsulation
achieved
during
Joule
heating
synthesis
(2060
K,
2
s)
where
naturally
nucleate
at
defect
sites.
In
meantime,
catalyze
deposition
mobile
carbon
atoms
form
protective
few-layer
shell
rapid
quenching
process,
thus
remarkably
strengthening
stability
between
ACW.
As
result,
HEAs@ACW
shows
not
only
favorable
activity
an
overpotential
7
mV
10
mA
cm
Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 5, 2025
Abstract
As
global
demand
for
clean
and
sustainable
energy
continues
to
rise,
fuel
cell
technology
has
seen
rapid
advancement.
However,
the
presence
of
trace
impurities
like
carbon
monoxide
(CO)
hydrogen
sulfide
(H₂S)
in
can
significantly
deactivate
anode
by
blocking
its
active
sites,
leading
reduced
performance.
Developing
electrocatalysts
that
are
resistant
CO
H₂S
poisoning
therefore
become
a
critical
priority.
This
paper
provides
comprehensive
analysis
mechanisms
reviews
key
strategies
developed
over
past
few
decades
enhance
impurity
tolerance
electrocatalysts.
It
begins
examining
differences
oxidation
reaction
(HOR)
acidic
alkaline
environments,
focusing
on
roles
binding
(HBE)
hydroxide
(OHBE).
Next,
it
outlines
three
main
approaches
mitigate
poisoning:
(I)
bifunctional
mechanisms,
(II)
direct
(III)
constructing
protective
layers.
The
review
then
shifts
countering
poisoning,
emphasizing
both
electrocatalyst
design
structural
improvements
cells.
Finally,
highlights
recent
advances
anti‐poisoning
electrocatalysts,
discusses
their
applications
limitations,
identifies
challenges
future
opportunities
further
research
this
field.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(36)
Published: June 14, 2024
Reconstruction-engineered
electrocatalysts
with
enriched
high
active
Ni
species
for
urea
oxidation
reaction
(UOR)
have
recently
become
promising
candidates
energy
conversion.
However,
to
inhibit
the
over-oxidation
of
brought
by
valence
state
Ni,
tremendous
efforts
are
devoted
obtaining
low-value
products
nitrogen
gas
avoid
toxic
nitrite
formation,
undesirably
causing
inefficient
utilization
cycle.
Herein,
we
proposed
a
mediation
engineering
strategy
significantly
boost
high-value
formation
help
close
loop
employment
economy.
Specifically,
platinum-loaded
nickel
phosphides
(Pt-Ni
