Advanced Energy Materials,
Год журнала:
2024,
Номер
14(30)
Опубликована: Май 27, 2024
Abstract
Electrochemical
water
splitting
is
a
promising
technique
for
the
production
of
high‐purity
hydrogen.
Substituting
slow
anodic
oxygen
evolution
reaction
with
an
oxidation
that
thermodynamically
more
favorable
enables
energy‐efficient
Moreover,
this
approach
facilitates
degradation
environmental
pollutants
and
synthesis
value‐added
chemicals
through
rational
selection
small
molecules
as
substrates.
Strategies
small‐molecule
electrocatalyst
design
are
critical
to
electrocatalytic
performance,
focus
on
achieving
high
current
density,
selectivity,
Faradaic
efficiency,
operational
durability.
This
perspective
discusses
key
factors
required
further
advancement,
including
technoeconomic
analysis,
new
reactor
system
design,
meeting
requirements
industrial
applications,
bridging
gap
between
fundamental
research
practical
product
detection
separation.
aims
advance
development
hybrid
electrolysis
applications.
Advanced Science,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 7, 2025
Abstract
Overall
water
splitting
(OWS)
to
produce
hydrogen
has
attracted
large
attention
in
recent
years
due
its
ecological‐friendliness
and
sustainability.
However,
the
efficiency
of
OWS
been
forced
by
sluggish
kinetics
four‐electron
oxygen
evolution
reaction
(OER).
The
replacement
OER
alternative
electrooxidation
small
molecules
with
more
thermodynamically
favorable
potentials
may
fundamentally
break
limitation
achieve
production
low
energy
consumption,
which
also
be
accompanied
value‐added
chemicals
than
or
electrochemical
degradation
pollutants.
This
review
critically
assesses
latest
discoveries
coupled
various
OWS,
including
alcohols,
aldehydes,
amides,
urea,
hydrazine,
etc.
Emphasis
is
placed
on
corresponding
electrocatalyst
design
related
mechanisms
(e.g.,
dual
hydrogenation
N–N
bond
breaking
hydrazine
C═N
regulation
urea
inhibit
hazardous
NCO
−
NO
productions,
etc.),
along
emerging
reactions
(electrooxidation
tetrazoles,
furazans,
iodide,
quinolines,
ascorbic
acid,
sterol,
trimethylamine,
etc.).
Some
new
decoupled
electrolysis
self‐powered
systems
are
discussed
detail.
Finally,
potential
challenges
prospects
highlighted
aid
future
research
directions.
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 7, 2025
Abstract
The
NiFe‐based
layered
double
hydroxides
(LDH)
undergo
surface
reconstruction,
generating
metal
hydroxyl
oxides
that
act
as
active
species
during
the
alkaline
oxygen
evolution
reaction
(OER).
However,
sluggish
reconstruction
process
and
excessive
oxidation
at
higher
anodic
potentials
frustrate
OER
activity
stability.
Herein,
a
cation–anion
collaborative
coordination
strategy
is
harnessed
to
build
(Ni,
Fe)─S─Zn
structures
in
NiFe
LDH
on
nickel
foam
(S‐NiFeZn
LDH/NF),
which
lowers
energy
barrier
aids
forming
highly
β‐NiOOH
process.
Meanwhile,
also
optimize
adsorption
of
oxygen‐containing
intermediates,
enhancing
kinetics.
As
result,
S‐NiFeZn
LDH/NF
achieves
low
overpotentials
201
mV
10
mA
cm
−2
293
500
1.0
m
KOH.
Moreover,
cell
assembled
with
anode
commercial
NiMo
cathode
demonstrates
excellent
overall
water
splitting
activity,
voltages
1.62
1.81
V
KOH,
exhibits
ultralong‐term
durability
over
h
,
even
operating
stably
for
200
an
electrolyzer
under
industrial
conditions
(30%
KOH
80
°C).
Doping
of
metal
ions
shows
promising
potential
in
optimizing
and
modulating
the
electrical
conductivity
layered
double
hydroxides
(LDHs).
However,
there
is
still
much
room
for
improvement
common
conventional
doping
methods.
In
contrast
to
previous
methodologies,
a
hollow
triangular
nanoflower
structure
CoFeV-LDHs
devised,
which
enriched
with
greater
number
oxygen
vacancies.
This
resulted
significant
enhancement
LDHs,
leading
an
increase
energy
density
following
appropriate
V.
To
investigate
impact
V-doping
on
situ
XPS
X-ray
spectroscopy
employed.
Regarding
electrochemical
performance,
CoFeV-LDHs/NF
electrode
optimal
ratio
exhibited
specific
capacitance
881
F
g
Advanced Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 22, 2024
Understanding
the
effect
of
elements'
oxygen
affinity
is
essential
for
comprehending
high-entropy
alloys'
(HEAs)
complete
properties.
However,
origin
HEAs'
oxygen-containing
structure
and
stability
remains
poorly
understood,
primarily
due
to
their
diverse
components,
hindering
synthesis
analysis.
Herein,
O-doping
HEAs
(HEA-O)
have
demonstrated
outstanding
performance
in
electrolyzed
water
Zinc-air
batteries
which
can
be
reassembled
after
being
stable
more
than
1600
h
when
zinc
consumption
over.
The
experiment
DFT
simulation
demonstrate
that
Cr
with
strong
introduce
into
system
HEAs.
Consequently,
interstitial
oxygens
act
as
electronic
buffers
making
binding
energy
other
metal
elements
move
a
higher
level.
Additionally,
lowers
d-band
center
promoting
electrochemical
activity
increasing
vacancy
formation
energies
active
sites
leading
super
stability.
study
provides
significant
insights
design
comprehension
oxygen-doped
Journal of the American Chemical Society,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 8, 2025
Electrochemical
H2
production
from
water
favors
low-voltage
molecular
oxidation
to
replace
the
oxygen
evolution
reaction
as
an
energy-saving
and
value-added
approach.
However,
there
exists
a
mismatch
between
high
demand
for
slow
anodic
reactions,
restricting
practical
applications
of
such
hybrid
systems.
Here,
we
propose
bipolar
approach,
with
generation
N–N
oxidatively
coupled
dehydrogenation
(OCD)
3,5-diamino-1H-1,2,4-triazole
(DAT),
in
addition
cathodic
generation.
The
system
requires
relatively
low
potentials
0.872
1.108
V
vs
RHE
reach
10
500
mA
cm–2,
respectively.
H-type
electrolyzer
only
0.946
1.129
deliver
100
respectively,
electricity
consumption
(1.3
kWh
per
m3
H2)
reduced
by
68%,
compared
conventional
splitting.
Moreover,
process
is
highly
appealing
due
absence
traditional
hazardous
synthetic
conditions
azo
compounds
at
anode
crossover/mixing
H2/O2
electrolyzer.
A
flow-type
operates
stably
cm–2
300
h.
Mechanistic
studies
reveal
that
Pt
single
atom
nanoparticle
(Pt1,n)
optimize
adsorption
S
active
sites
over
Pt1,n@VS2
catalysts.
At
anode,
stepwise
−NH2
DAT
then
oxidative
coupling
−N–N–
predominantly
form
while
generating
H2.
present
report
paves
new
way
atom-economical
aminotriazole
green
electrosynthesis
chemicals.
ACS Nano,
Год журнала:
2024,
Номер
18(52), С. 35654 - 35670
Опубликована: Дек. 11, 2024
Replacing
the
oxygen
evolution
reaction
(OER)
with
urea
oxidation
(UOR)
in
conjunction
hydrogen
(HER)
offers
a
feasible
and
environmentally
friendly
approach
for
handling
urea-rich
wastewater
generating
energy-saving
hydrogen.
However,
deactivation
detachment
of
active
sites
powder
electrocatalysts
reported
hitherto
present
significant
challenges
to
achieving
high
efficiency
sustainability
production.
Herein,
self-supported
bimetallic
nickel
manganese
metal–organic
framework
(NiMn-MOF)
nanosheet
its
derived
heterostructure
composed
NiMn-MOF
decorated
ultrafine
Pt
nanocrystals
(PtNC/NiMn-MOF)
are
rationally
designed.
By
leveraging
synergistic
effect
Mn
Ni,
along
strong
electronic
interaction
between
PtNC
at
interface,
optimized
catalysts
(NiMn-MOF
PtNC/NiMn-MOF)
exhibit
substantially
reduced
potentials
1.459
−0.129
V
reach
1000
mA
cm–2
during
UOR
HER.
Theoretical
calculations
confirm
that
Mn-doping
heterointerface
regulate
d-band
center
catalyst,
which
turn
enhances
electron
transfer
facilitates
charge
redistribution.
This
manipulation
optimizes
adsorption/desorption
energies
reactants
intermediates
both
HER
UOR,
thereby
significantly
reducing
energy
barrier
rate-determining
step
(RDS)
enhancing
electrocatalytic
performance.
Furthermore,
degradation
rates
PtNC/NiMn-MOF
(96.1%)
(90.3%)
higher
than
those
Ni-MOF
most
advanced
catalysts.
work
provides
valuable
insights
designing
applicable
treatment
