Angewandte Chemie,
Journal Year:
2024,
Volume and Issue:
136(32)
Published: May 20, 2024
Abstract
The
efficient
electrosynthesis
of
hydrogen
peroxide
(H
2
O
)
via
two‐electron
oxygen
reduction
reaction
(2e
−
ORR)
in
neutral
media
is
undoubtedly
a
practical
route,
but
the
limited
comprehension
electrocatalysts
has
hindered
system
advancement.
Herein,
we
present
design
model
catalysts
comprising
mesoporous
carbon
spheres‐supported
Pd
nanoparticles
for
H
at
near‐zero
overpotential
with
approximately
95
%
selectivity
electrolyte.
Impressively,
optimized
Pd/MCS‐8
electrocatalyst
flow
cell
device
achieves
an
exceptional
yield
15.77
mol
g
catalyst
−1
h
,
generating
solution
accumulated
concentration
6.43
wt
%,
level
sufficiently
high
medical
disinfection.
Finite
element
simulation
and
experimental
results
suggest
that
carriers
promote
enrichment
localized
pH
elevation,
establishing
favorable
microenvironment
2e
ORR
media.
Density
functional
theory
calculations
reveal
robust
interaction
between
adsorption
OOH*
edge,
ensuring
active
process.
These
findings
offer
new
insights
into
carbon‐loaded
media,
emphasizing
role
carrier
engineering
constructing
microenvironments
synergizing
sites.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
36(25)
Published: March 8, 2024
Abstract
Non‐noble
transition
metal
(TM)‐based
compounds
have
recently
become
a
focal
point
of
extensive
research
interest
as
electrocatalysts
for
the
two
electron
oxygen
reduction
(2e
−
ORR)
process.
To
efficiently
drive
this
reaction,
these
TM‐based
must
bear
unique
physiochemical
properties,
which
are
strongly
dependent
on
their
phase
structures.
Consequently,
adopting
engineering
strategies
toward
structure
has
emerged
cutting‐edge
scientific
pursuit,
crucial
achieving
high
activity,
selectivity,
and
stability
in
electrocatalytic
This
comprehensive
review
addresses
intricate
field
applied
to
non‐noble
2e
ORR.
First,
connotation
fundamental
concepts
related
kinetics
thermodynamics
succinctly
elucidated.
Subsequently,
focus
shifts
detailed
discussion
various
approaches,
including
elemental
doping,
defect
creation,
heterostructure
construction,
coordination
tuning,
crystalline
design,
polymorphic
transformation
boost
or
revive
ORR
performance
(selectivity,
stability)
catalysts,
accompanied
by
an
insightful
exploration
phase‐performance
correlation.
Finally,
proposes
fresh
perspectives
current
challenges
opportunities
burgeoning
field,
together
with
several
critical
directions
future
development
electrocatalysts.
Chemical Science,
Journal Year:
2024,
Volume and Issue:
15(29), P. 11188 - 11228
Published: Jan. 1, 2024
The
oxygen
reduction
reaction
(ORR)
is
a
key
component
for
many
clean
energy
technologies
and
other
industrial
processes.
However,
the
low
selectivity
sluggish
kinetics
of
ORR
catalysts
have
hampered
conversion
efficiency
real
application
these
new
mentioned
before.
Recently,
tremendous
efforts
been
made
in
mechanism
understanding,
electrocatalyst
development
system
design.
Here,
comprehensive
critical
review
provided
to
present
recent
advances
field
electrocatalytic
ORR.
two-electron
four-electron
transfer
catalytic
mechanisms
evaluation
parameters
are
discussed
first.
Then,
up-to-date
synthetic
strategies
Angewandte Chemie International Edition,
Journal Year:
2023,
Volume and Issue:
63(7)
Published: Dec. 30, 2023
Abstract
The
electrosynthesis
of
hydrogen
peroxide
(H
2
O
)
via
two‐electron
(2
e
−
oxygen
(O
reduction
reaction
(ORR)
has
great
potential
to
replace
the
traditional
energy‐intensive
anthraquinone
process,
but
design
low‐cost
and
highly
active
selective
catalysts
is
greatly
challenging
for
long‐term
H
production
under
industrial
relevant
current
density,
especially
neutral
electrolytes.
To
address
this
issue,
work
constructed
a
carboxylated
hexagonal
boron
nitride/graphene
(
h
‐BN/G)
heterojunction
on
commercial
activated
carbon
through
coupling
B,
N
co‐doping
with
surface
groups
functionalization.
champion
catalyst
exhibited
high
ORR
selectivity
(>95
%),
rate
(up
13.4
mol
g
−1
),
Faradaic
efficiency
(FE,
>95
%).
density
100
mA
cm
−2
caused
cumulative
concentration
as
2.1
wt
%.
combination
in
situ
Raman
spectra
theoretical
calculation
indicated
that
h‐
BN/G
configuration
promotes
adsorption
stabilization
key
intermediates,
allowing
low
energy
barrier
rate‐determining
step
HOOH*
release
from
site
thus
improving
performance.
fast
dye
degradation
by
using
electrochemical
synthesized
further
illustrated
promising
practical
application.
ChemSusChem,
Journal Year:
2024,
Volume and Issue:
17(20)
Published: May 8, 2024
Abstract
Hydrogen
peroxide
(H
2
O
)
plays
a
crucial
role
in
various
applications,
such
as
green
oxidation
processes
and
the
production
of
high‐quality
fuels.
Currently,
H
is
primarily
manufactured
using
indirect
anthraquinone
method,
known
for
its
significant
energy
consumption
generation
intensive
by‐products.
Extensive
research
has
been
conducted
on
photocatalytic
via
oxygen
reduction
reaction
(ORR),
with
polymeric
carbon
nitride
(PCN)
emerging
promising
catalyst
this
conversion.
This
review
article
organized
around
two
approaches.
The
first
part
main
consists
chemical
optimization
PCN
structure,
while
second
focuses
physical
integration
other
functional
materials.
objective
to
clarify
correlation
between
physicochemical
properties
photocatalysts
their
effectiveness
production.
Through
thorough
analysis
findings,
seeks
stimulate
new
insights
achievements,
not
only
domain
ORR
but
also
redox
reactions.
