ACS Sustainable Chemistry & Engineering,
Год журнала:
2024,
Номер
12(26), С. 9856 - 9863
Опубликована: Июнь 19, 2024
Electrocatalytic
two-electron
oxygen
reduction
reaction
(2e–
ORR)
is
a
crucial
process
for
on-site
and
on-demand
H2O2
production.
Evaluating
the
impact
of
medium's
pH
essential
achieving
selective
production
at
higher
current
density
through
continuous
O2
supply
to
gas
diffusion
electrodes
(GDEs)
in
membrane
electrolyzers.
We
investigated
effect
electrolyte
on
both
flooding
behavior
GDEs
loaded
with
cobalt
single-atom
catalyst
typical
H-type
cell.
The
electrocatalyst
was
prepared
by
heating
cobalt(II)
tetraphenylporphyrin
Ketjen
Black
(CoTPP/KB)
750
°C.
Remarkably,
exhibited
high
when
top
hydrophobic
gas-diffusion
layer
exposed
phase,
facilitating
efficient
within
GDE.
Potential–time
curves
−40
mA
cm–2
showed
stable
potentials
Faradaic
efficiencies
(>80%)
over
5
h
across
range
from
1
10,
concentration
reaching
approximately
100
mmol
L–1
1.0.
In
contrast,
potential
13
decreased
abruptly
3
due
Long-term
tests
demonstrated
electrocatalytic
only
acidic
electrolytes
24
h,
attributed
reduced
decreasing
pH.
These
findings
underscore
GDE
performance
during
via
2e–
ORR,
acidity
favoring
mitigation
undesirable
behavior.
Chemical Reviews,
Год журнала:
2023,
Номер
123(22), С. 12507 - 12593
Опубликована: Ноя. 1, 2023
Electrocatalysis
underpins
the
renewable
electrochemical
conversions
for
sustainability,
which
further
replies
on
metallic
nanocrystals
as
vital
electrocatalysts.
Intermetallic
have
been
known
to
show
distinct
properties
compared
their
disordered
counterparts,
and
long
explored
functional
improvements.
Tremendous
progresses
made
in
past
few
years,
with
notable
trend
of
more
precise
engineering
down
an
atomic
level
investigation
transferring
into
practical
membrane
electrode
assembly
(MEA),
motivates
this
timely
review.
After
addressing
basic
thermodynamic
kinetic
fundamentals,
we
discuss
classic
latest
synthetic
strategies
that
enable
not
only
formation
intermetallic
phase
but
also
rational
control
other
catalysis-determinant
structural
parameters,
such
size
morphology.
We
demonstrate
emerging
nanomaterials
potentially
advancement
energy
electrocatalysis.
Then,
state-of-the-art
characterizations
representative
electrocatalysts
emphasis
oxygen
reduction
reaction
evaluated
a
MEA
setup.
summarize
review
by
laying
out
existing
challenges
offering
perspective
future
research
directions
toward
practicing
conversions.
Coordination Chemistry Reviews,
Год журнала:
2024,
Номер
514, С. 215900 - 215900
Опубликована: Май 8, 2024
Catalysis
stands
as
a
cornerstone
in
chemical
synthesis,
pivotal
advancing
sustainable
manufacturing
pathways.
The
evolution
from
energy-intensive
to
catalytic
processes
has
marked
transformative
shift,
notably
exemplified
by
low-energy
methods.
These
processes,
operating
under
milder
conditions
and
emphasizing
selectivity
recyclability,
represent
the
forefront
of
chemistry.
This
review
navigates
through
an
array
reactions,
highlighting
their
diverse
applications
culminating
exploration
recent
strides
within
processes.
For
example,
explores
uses
such
enzyme
mimicking,
biodiesel
production,
carbon
dioxide
capture,
organic
synthesis.
Additionally,
it
covers
enzymatic
catalysis
photocatalysis
for
transformations,
energy
applications,
water
treatment.
Notably,
emphasizes
capabilities
single-atom
(SAC)
diatomic
catalysts
(DACs),
recognizing
exceptional
performance
catalyzing
reactions
at
minimal
activation
energies
while
maintaining
high
efficiency
mild
conditions.
By
elucidating
modulation
electronic
structure
offering
microelectronic
perspective,
aims
elucidate
mechanisms
underlying
activity
SAC
DACs.
Emphasizing
interplay
between
coordination
chemistry
principles
efficacy,
elucidates
indispensable
role
complexes
fortifying
sustainability
these
spotlighting
fusion
with
catalysis,
this
underscore
collective
influence
shaping
landscape
production.
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 10, 2025
Abstract
The
local
electrolyte
micro‐environment
surrounding
the
catalyst
reaction
center,
including
critical
factors
such
as
pH,
reactant
concentration,
and
electric
field,
plays
a
decisive
role
in
electrocatalytic
reactions
water
splitting.
Recently,
this
topic
has
garnered
significant
attention
due
to
its
potential
significantly
enhance
catalytic
performance.
While
various
strategies
optimize
processes
have
been
explored,
deliberate
control
over
fundamental
principles
guiding
these
adjustments
remain
their
early
stages
of
development.
This
review
provides
comprehensive
examination
key
efforts
aimed
at
designing
tailoring
localized
micro‐environments
improve
It
discusses
advances
micro‐environmental
design,
methodologies
for
evaluating
shifts,
mechanistic
insights
driving
developments.
Additionally,
highlights
existing
challenges
prospective
industrial
applications
strategies.
By
offering
detailed
analysis
recent
developments,
aims
equip
researchers
with
practical
knowledge
on
controlling
micro‐environments,
thereby
accelerating
progress
toward
real‐world
processes.
Hydrogen
peroxide
(H2O2)
is
an
environmentally
friendly
and
efficient
oxidant
with
diverse
applications
in
the
chemical
industry,
medicine,
energy,
environmental
protection.
While
anthraquinone
oxidation
process
has
traditionally
dominated
industrial
H2O2
production,
its
complexity
high
pollution
levels
present
significant
challenges.
In
response,
alternative
methods
such
as
electrochemical,
photochemical,
photoelectrochemical
pathways
have
emerged,
providing
greener
more
sustainable
solutions.
These
innovative
approaches
leverage
only
water,
oxygen,
solar
or
electrical
positioning
them
viable
substitutes
for
energy-intensive
process.
This
review
delves
into
latest
advancements
production
through
twoelectron
oxygen
reduction
reaction
(2e-ORR),
water
(2e-WOR),
synergistic
two-channel
pathway
(2e-ORR
+
2e-WOR)
(photo)electrochemical
systems,
focusing
on
pathways.
It
discusses
underlying
mechanisms,
evaluation
parameters,
design
of
high-performance
catalysts
on-site
applications.
Recent
developments
advanced
(photo)electrocatalysts
over
past
five
years
are
highlighted,
including
key
strategies
that
enhance
catalytic
performance.
The
also
addresses
future
challenges
prospects
catalyst
practical
systems
serving
a
valuable
reference
researchers
field.
