Journal of The Electrochemical Society,
Год журнала:
2024,
Номер
171(9), С. 096506 - 096506
Опубликована: Авг. 22, 2024
Platinum
nanoparticles
(PtNPs)
are
attached
to
different
single
heteroatom-doped
(N,
S,
P,
and
B)
dual
B
N,
P)
graphene
nanosheets
via
electrochemical
deposition
using
the
chronoamperometric
method,
which
allowed
for
strong
attachment
of
PtNPs
onto
support
surface.
The
effect
material
on
electrocatalytic
activity
oxygen
reduction
reaction
(ORR)
in
acidic
media
is
examined.
supported
boron-doped
exhibit
highest
specific
(1.26
mA
cm
−2
),
nitrogen
boron
mass
(0.70
A
mg
−1
)
at
0.9
V
vs
reversible
hydrogen
electrode.
kinetics
ORR
vary
significantly
depending
dopants,
thus
concluding
that
heteroatom
doping
affects
toward
ORR.
ACS Catalysis,
Год журнала:
2024,
Номер
14(9), С. 6369 - 6403
Опубликована: Апрель 11, 2024
Hydrogen
peroxide
is
a
crucial
commodity
with
wide
range
of
applications
in
variety
industrial
processes,
including
disinfection
and
water
treatment.
With
the
neologism
green
H2O2,
we
can
classify
hydrogen
produced
by
oxygen
reduction
or
oxidation
making
use
electricity
obtained
from
renewable
sources
without
emitting
carbon
dioxide
into
atmosphere.
The
production
environmentally
friendly
H2O2
through
reduction,
even
more
so
oxidation,
currently
impeded
slow
advancement
efficient
electrocatalysts,
along
lack
suitable
reactors.
Nonetheless,
realization
producing
within
reach.
In
this
regard,
review
paper
aims
to
evaluate
resume
not
only
existing
literature
considering
synthetic
procedures
performances
different
electrocatalysts
but
also
put
order
clarify
aspects
relating
mechanism
role
active
sites
various
functional
materials
proposed
(both
as
model
system
scalable
one),
while
highlighting
good
practices
for
correct
electrochemical
screening
thus
obtaining
reliable
performance
parameters.
Hence,
comprehensive
evaluation
catalysts,
those
based
on
noble
metals,
noble-metal-free,
metal-free
presented
critically
discussed.
This
encompasses
activity
selectivity
considers
sustainability
perspective.
A
thorough
assessment
methods
techniques
detection
quantification
conducted,
particular
attention
understanding
applications:
transitioning
qualitative
quantitative
analysis
involves
employing
unravel
synthesis
utilizing
capable
identifying
quantifying
environmental
biomedical
ones.
emphasis
potential
cross-contamination
between
fields
that,
although
distinct
their
aspects,
may
involve
H2O2.
Furthermore,
an
effort
made
emphasize
technological
advancements
outline
expectations
development
electrolyzers,
taking
consideration
factors,
rate
conversion,
accumulation,
operating
voltage.
Angewandte Chemie International Edition,
Год журнала:
2023,
Номер
62(24)
Опубликована: Март 27, 2023
In
supported
metal
catalysts,
the
supports
would
strongly
interact
with
components
instead
of
just
acting
as
a
carrier,
which
greatly
affects
both
their
synthesis
and
catalytic
activity,
selectivity,
stability.
Carbon
is
considered
very
important
but
inert
support
thus
hard
to
induce
strong
metal-support
interaction
(SMSI).
This
mini-review
highlights
that
sulfur-a
documented
poison
reagent
for
catalysts-when
doped
in
carbon
can
diverse
SMSI
phenomenon,
including
electronic
(EMSI),
classic
SMSI,
reactive
(RMSI).
These
between
sulfur-doped
(S-C)
enables
catalysts
extraordinary
resistance
sintering
at
high
temperatures
up
1100
°C,
allows
general
single-atom,
alloy
cluster,
intermetallic
compound
dispersion
loading
variety
applications.
Angewandte Chemie,
Год журнала:
2023,
Номер
136(1)
Опубликована: Сен. 29, 2023
Abstract
In
the
evolving
field
of
electrocatalysis,
thermal
treatment
nano‐electrocatalysts
has
become
an
essential
strategy
for
performance
enhancement.
This
review
systematically
investigates
impact
various
treatments
on
catalytic
potential
nano‐electrocatalysts.
The
focus
encompasses
in‐depth
analysis
changes
induced
in
structural,
morphological,
and
compositional
properties,
as
well
alterations
electro‐active
surface
area,
chemistry,
crystal
defects.
By
providing
a
comprehensive
comparison
commonly
used
techniques,
such
annealing,
calcination,
sintering,
pyrolysis,
hydrothermal,
solvothermal
methods,
this
serves
scientific
guide
selecting
right
technique
favorable
temperature
to
tailor
optimal
electrocatalysis.
resultant
modifications
activity
are
explored
across
key
electrochemical
reactions
(bio)sensing,
degradation,
oxygen
reduction
reaction,
hydrogen
evolution
overall
water
splitting,
fuel
cells,
carbon
dioxide
reaction.
Through
detailed
examination
underlying
mechanisms
synergistic
effects,
contributes
fundamental
understanding
role
enhancing
electrocatalytic
properties.
insights
provided
offer
roadmap
future
research
aimed
at
optimizing
nanomaterials,
fostering
development
next‐generation
sensors
energy
conversion
technologies.
ACS Catalysis,
Год журнала:
2023,
Номер
13(20), С. 13804 - 13815
Опубликована: Окт. 12, 2023
Rare
earth-based
alloy
nanostructures
show
great
potential
as
materials
in
the
hydrogen
evolution
reaction
(HER),
and
they
have
a
relatively
negative
enthalpy
of
formation
compared
to
traditional
transition
metal
alloys,
which
resist
dissolution
alloys
reaction.
In
addition,
liner
relationship
can
be
observed
d-band
filling
electrochemical
activity.
Therefore,
rare
nanostructure
contains
advantages
transmission
catalysts
performs
better
selectivity
stability.
However,
reduction
potentials
earth
(RE)
group
are
relevantly
low,
typically
less
than
−1.9
V,
synthesis
methods
RE
very
important.
this
Perspective,
we
generalize
preparation
method
their
applications
related
Through
recent
research
on
reaction,
future
development
direction
is
pointed
out.
Angewandte Chemie International Edition,
Год журнала:
2023,
Номер
63(1)
Опубликована: Сен. 29, 2023
Abstract
In
the
evolving
field
of
electrocatalysis,
thermal
treatment
nano‐electrocatalysts
has
become
an
essential
strategy
for
performance
enhancement.
This
review
systematically
investigates
impact
various
treatments
on
catalytic
potential
nano‐electrocatalysts.
The
focus
encompasses
in‐depth
analysis
changes
induced
in
structural,
morphological,
and
compositional
properties,
as
well
alterations
electro‐active
surface
area,
chemistry,
crystal
defects.
By
providing
a
comprehensive
comparison
commonly
used
techniques,
such
annealing,
calcination,
sintering,
pyrolysis,
hydrothermal,
solvothermal
methods,
this
serves
scientific
guide
selecting
right
technique
favorable
temperature
to
tailor
optimal
electrocatalysis.
resultant
modifications
activity
are
explored
across
key
electrochemical
reactions
(bio)sensing,
degradation,
oxygen
reduction
reaction,
hydrogen
evolution
overall
water
splitting,
fuel
cells,
carbon
dioxide
reaction.
Through
detailed
examination
underlying
mechanisms
synergistic
effects,
contributes
fundamental
understanding
role
enhancing
electrocatalytic
properties.
insights
provided
offer
roadmap
future
research
aimed
at
optimizing
nanomaterials,
fostering
development
next‐generation
sensors
energy
conversion
technologies.
ACS Applied Energy Materials,
Год журнала:
2024,
Номер
7(2), С. 390 - 402
Опубликована: Янв. 5, 2024
Catalyst
durability
is
one
of
the
crucial
factors
for
large-scale
commercialization
proton-exchange
membrane
fuel
cells
(PEMFCs).
Graphene
a
potential
candidate
catalyst
support,
among
various
alternatives,
owing
to
its
excellent
properties,
such
as
high
surface
area
and
stability.
Its
employment
has,
however,
been
limited
due
difficulties
involved
in
production
maintaining
optimal
functional
groups
Pt
incorporation
without
compromising
innate
In
this
work,
we
synthesized
functionalized
multilayer
graphene
with
situ
nitrogen
doping
using
simple,
one-step
electrochemical
process
at
room
temperature
an
eco-friendly
source.
We
investigated
parameters,
electrolyte
concentrations,
synthesis
conditions,
need
post-exfoliation
procedures
produce
optimized
support.
Nitrogen
up
10
at.
%
was
obtained
by
increasing
precursor
concentration.
performed
ultrafast
microwave-assisted
polyol
process.
Uniform
distribution
average
particle
size
<2
nm
on
When
tested
activity
toward
oxygen
reduction
reaction
(ORR)
acidic
media,
catalysts
exhibited
higher
onset
mass
than
commercial
Pt/C
catalyst.
Accelerated
degradation
tests
revealed
electrochemically
active
retention
compared
commercially
available
Pt/C.
Abstract
This
study
emphasizes
the
effect
of
CeO
2
on
Pt
nanoparticle
(NP)
dimension,
stability,
and
activity
versus
oxygen
reduction
reaction.
It
is
demonstrated
that
one‐pot
synthesis
NPs
along
with
over
carbon
support
produces
small
(2
nm)
higher
activity,
than
sole
NPs,
thanks
to
cooperative
interaction
exerted
by
.
nicely
using
synchrotron
wide‐angle
X‐ray
total
scattering
advanced
data
analysis,
monitoring
in
situ
nucleation
growth
presence
preformed
or
a
Ce
precursor.
Raman,
photoelectron
spectroscopy,
high‐resolution
transmission
electron
microscopy
analyses
are
carried
out
formation
vacancies
responsible
for
metal–support
interaction.
Moreover,
most
effective
catalyst,
PtCeO
/C250
(mass
activity:
MA
0.9
V
=
423
Ag
−1
;
specific
SA
446
µAcm
−2
),
exhibits
comparable
commercial
benchmark
Pt/C,
yet
significantly
greater
stability
as
accelerated
stress
tests
conducted
gas
diffusion
electrode.
Specifically,
retains
62%
±
7%
its
0.65
79%
9%
,
compared
43%
5%
7%,
respectively,
benchmark.
ACS Nano,
Год журнала:
2023,
Номер
17(23), С. 24395 - 24403
Опубликована: Дек. 4, 2023
Carbon-supported
metal
nanoparticles
(NPs)
comprise
an
important
class
of
heterogeneous
catalysts.
The
interaction
between
the
and
carbon
support
influences
overall
material
properties,
viz.,
catalytic
performance.
Herein
we
use
in
situ
ex
transmission
electron
microscopy
(TEM)
combination
with
X-ray
spectroscopy
(XPS)
to
investigate
encapsulation
metallic
iridium
NPs
by
Ir/C
catalyst.
Real-time
atomic-scale
imaging
visualizes
particle
reshaping
increased
graphitization
upon
heating
vacuum.
According
TEM
results,
overcoating
grows
over
Ir
during
process,
starting
from
ca.
550
°C.
With
overlayers
formed,
no
sintering
migration
is
observed
at
800
°C,
yet
initial
sinter
or
below
i.e.,
a
temperature
associated
incomplete
encapsulation.
overlayer
corrugates
when
decreased
200
°C
this
process
surface
reconstruction
reversible,
such
that
corrugated
can
be
smoothed
out
increasing
back
performance
(activity
stability)
encapsulated
hydrogen
evolution
reaction
(HER)
higher
than
(nonencapsulated)
state
Ir/C.
Overall,
work
highlights
microscopic
details
currently
understudied
phenomenon
supported
noble
demonstrates
additionally
effective
measure
for
tuning
