Advanced Materials Interfaces,
Год журнала:
2024,
Номер
unknown
Опубликована: Авг. 27, 2024
Abstract
The
quest
for
composite
materials
with
unique
features
that
each
component,
inherently,
does
not
have
is
always
an
aspirational
but
challenging
task.
Among
Transition
metal
oxides
(TMOs),
TiO
2
emerged
as
a
prototype
due
to
its
earth
abundance,
environmental
friendliness,
and
cost‐effectiveness,
which
has
shown
high
activity
photocatalytic
hydrogen
evolution.
Unfortunately,
inert
electrocatalytic
evolution
reaction
(HER)
because
it
poor
electrical
conductivity
unfavorable
adsorption/desorption
behavior.
Herein
the
revitalization
of
overall
water
splitting,
i.e.,
both
HER
oxygen
(OER)
reported
by
anchoring
rutile‐anatase
(a/r)
nanoparticles
on
‐OH/‐F
terminated
V
4
C
3
T
x
MXene,
giving
a/r
@V
heterostructure.
synergetic
effect
showcases
remarkable
pH‐independent
overpotential
35,
39,
82
mV
in
0.5
m
H
SO
,
1
KOH,
phosphate‐buffered
saline
(PBS)
respectively.
catalyst
also
exhibits
OER
lowest
217,
267,
292
PBS
respectively,
outperforms
pure
.
These
findings,
first
time,
support
success
anatase‐rutile
MXene
omnidirectional
performance,
low
pH
independence,
pave
avenue
finding
cost‐effective
catalysts
splitting.
Journal of the American Chemical Society,
Год журнала:
2023,
Номер
145(39), С. 21432 - 21441
Опубликована: Сен. 20, 2023
Although
dispersing
Pt
atomic
clusters
(ACs)
on
a
conducting
support
is
promising
way
to
minimize
the
amount
required
in
hydrogen
evolution
reaction
(HER),
catalytic
mass
activity
and
durability
of
ACs
are
often
unsatisfactory
for
alkaline
HER
due
their
unfavorable
water
dissociation
challenges
stabilizing
them
against
agglomeration
detachment.
Herein,
we
report
class
single-atom
Cr-N4
sites
with
high
oxophilicity
interfaced
mesoporous
carbon
achieving
highly
active
stable
an
anion-exchange-membrane
electrolyzer
(AEMWE).
The
as-made
catalyst
achieves
highest
reported
(37.6
times
higher
than
commercial
Pt/C)
outstanding
operational
stability.
Experimental
theoretical
studies
elucidate
that
formation
unique
Pt-Cr
quasi-covalent
bonding
interaction
at
interface
effectively
suppresses
migration
thermal
vibration
atoms
stabilize
contributes
greatly
enhanced
Moreover,
oxophilic
adjacent
favorable
adsorption
hydroxyl
species
facilitate
nearly
barrierless
thus
enhance
activity.
An
AEMWE
using
this
(with
only
50
μgPt
cm-2)
can
operate
stably
industrial-level
current
density
500
mA
cm-2
1.8
V
>100
h
small
degradation
rate
90
μV
h-1.
Journal of the American Chemical Society,
Год журнала:
2024,
Номер
146(13), С. 9012 - 9025
Опубликована: Март 22, 2024
The
development
of
efficient
and
stable
catalysts
for
hydrogen
production
from
electrolytic
water
in
a
wide
pH
range
is
great
significance
alleviating
the
energy
crisis.
Herein,
Pt
nanoparticles
(NPs)
anchored
on
vacancy
high
entropy
rare
earth
oxides
(HEREOs)
were
prepared
first
time
highly
by
electrolysis.
Pt-(LaCeSmYErGdYb)O
showed
excellent
electrochemical
performances,
which
require
only
12,
57,
77
mV
to
achieve
current
density
100
mA
cm–2
0.5
M
H2SO4,
1.0
KOH,
PBS
environments,
respectively.
In
addition,
has
successfully
worked
at
400
@
60
°C
h
presenting
mass
activity
37.7
A
mg–1Pt
turnover
frequency
(TOF)
value
38.2
s–1
12
mV,
far
superior
recently
reported
evolution
reaction
(HER)
catalysts.
Density
functional
theory
(DFT)
calculations
have
revealed
that
interactions
between
HEREO
optimized
electronic
structures
electron
transfer
binding
strength
intermediates.
This
further
leads
proton
dissociation,
supporting
robust
HER
performances
different
environments.
work
provides
new
idea
design
RE-based
electrocatalysts.
Inorganic Chemistry Frontiers,
Год журнала:
2024,
Номер
11(14), С. 4080 - 4106
Опубликована: Янв. 1, 2024
This
summary
describes
the
effects
of
wettability,
local
pH,
interfacial
water
structure,
and
electrolyte
composition
on
interface
reactant
compositions,
key
intermediate
adsorption,
reaction
kinetics.
Angewandte Chemie International Edition,
Год журнала:
2023,
Номер
62(38)
Опубликована: Авг. 7, 2023
The
crucial
issue
restricting
the
application
of
direct
ethanol
fuel
cells
(DEFCs)
is
incomplete
and
sluggish
electrooxidation
due
to
chemically
stable
C-C
bond
thereof.
Herein,
a
unique
ethylene-mediated
pathway
with
100
%
C1-selectivity
for
oxidation
reaction
(EOR)
proposed
first
time
based
on
well-structured
Pt/Al2
O3
@TiAl
catalyst
cascade
active
sites.
electrochemical
in
situ
Fourier
transform
infrared
spectroscopy
(FTIR)
differential
mass
spectrometry
(DEMS)
analysis
disclose
that
primarily
dehydrated
surface
Al2
derived
ethylene
further
oxidized
completely
nanostructured
Pt.
X-ray
absorption
density
functional
theory
(DFT)
studies
Al
component
doped
Pt
nanocrystals
can
promote
EOR
kinetics
by
lowering
energy
barriers
eliminating
poisonous
species.
Strikingly,
exhibits
specific
activity
3.83
mA
cm-2Pt
,
7.4
times
higher
than
commercial
Pt/C
superior
long-term
durability.
Advanced Functional Materials,
Год журнала:
2023,
Номер
34(13)
Опубликована: Дек. 14, 2023
Abstract
Hydrazine‐assisted
water
electrolyzer
is
a
promising
energy‐efficient
alternative
to
conventional
electrolyzer,
offering
an
appealing
path
for
sustainable
hydrogen
(H
2
)
production
with
reduced
energy
consumption.
However,
such
presently
impeded
by
lacking
efficient
catalyst
accelerate
the
kinetics
of
pivotal
half‐reaction,
that
is,
hydrazine
oxidation
reaction
(HzOR).
Herein,
ruthenium
(Ru)
single‐atom
on
octahedral
cobalt
oxide
(Co
3
O
4
substrate
(Ru‐Co
catalyst,
guided
theoretical
calculations
developed.
Those
lattice‐confined
Ru
sites
within
structure
spinel
Co
effectively
lower
barrier
required
formation
N
H
*
intermediate
and
desorption
species
in
HzOR.
As
result,
Ru‐Co
achieves
superior
HzOR
performance
low
potential
−0.024
V
versus
(vs.)reversible
electrode
(RHE)
at
100
mA
cm
−2
remarkable
stability
over
200
h
.
Importantly,
modular
output
0.48
kWh
electricity
per
m
decoupling
pairing
evolution
(HER)
half‐reaction
Zinc
(Zn)
redox
reservoir.
The
work
represents
significant
advancement
field,
substantial
flexibility
on‐demand
output.
Journal of Materials Chemistry A,
Год журнала:
2024,
Номер
12(10), С. 5858 - 5865
Опубликована: Янв. 1, 2024
Ru-Ni
2
P@CN
was
synthesized
by
'hydrothermal
reaction-Ru
solution
impregnation-phosphating'
using
Vb
12
as
nitrogen
source
and
carbon
source.
In
addition,
a
large
amount
of
Ru
doping
tensile
strain
were
successfully
introduced
into
the
catalyst.
