Angewandte Chemie,
Год журнала:
2024,
Номер
136(12)
Опубликована: Янв. 30, 2024
Abstract
Efficient
dual‐single‐atom
catalysts
are
crucial
for
enhancing
atomic
efficiency
and
promoting
the
commercialization
of
fuel
cells,
but
addressing
sluggish
kinetics
hydrogen
oxidation
reaction
(HOR)
in
alkaline
media
facile
site
generation
remains
formidable
challenges.
Here,
we
break
local
symmetry
ultra‐small
ruthenium
(Ru)
nanoparticles
by
embedding
cobalt
(Co)
single
atoms,
which
results
release
Ru
atoms
from
on
reduced
graphene
oxide
(Co
1
1,n
/rGO).
In
situ
operando
spectroscopy
theoretical
calculations
reveal
that
oxygen‐affine
Co
atom
disrupts
nanoparticles,
resulting
parasitic
within
nanoparticles.
The
interaction
between
forms
effective
active
centers.
parasitism
modulates
adsorption
OH
intermediates
sites,
accelerating
HOR
through
faster
formation
*H
2
O.
As
anticipated,
/rGO
exhibits
ultrahigh
mass
activity
(7.68
A
mg
−1
)
at
50
mV
exchange
current
density
(0.68
mA
cm
−2
),
6
7
times
higher
than
those
Ru/rGO,
respectively.
Notably,
it
also
displays
exceptional
durability
surpassing
commercial
Pt
catalysts.
This
investigation
provides
valuable
insights
into
hybrid
multi‐single‐atom
metal
nanoparticle
catalysis.
Angewandte Chemie International Edition,
Год журнала:
2023,
Номер
62(42)
Опубликована: Сен. 2, 2023
Abstract
Designing
novel
single‐atom
catalysts
(SACs)
supports
to
modulate
the
electronic
structure
is
crucial
optimize
catalytic
activity,
but
rather
challenging.
Herein,
a
general
strategy
proposed
utilize
metalloid
properties
of
trap
and
stabilize
single‐atoms
with
low‐valence
states.
A
series
supported
on
surface
tungsten
carbide
(M‐WC
x
,
M=Ru,
Ir,
Pd)
are
rationally
developed
through
facile
pyrolysis
method.
Benefiting
from
WC
exhibit
weak
coordination
W
C
atoms,
resulting
in
formation
active
centers
similar
metals.
The
unique
metal‐metal
interaction
effectively
stabilizes
single
atoms
improves
orbital
energy
level
distribution
sites.
As
expected,
representative
Ru‐WC
exhibits
superior
mass
activities
7.84
62.52
mg
Ru
−1
for
hydrogen
oxidation
evolution
reactions
(HOR/HER),
respectively.
In‐depth
mechanistic
analysis
demonstrates
that
an
ideal
dual‐sites
cooperative
mechanism
achieves
suitable
adsorption
balance
H
ad
OH
energetically
favorable
Volmer
step.
This
work
offers
new
guidance
precise
construction
highly
SACs.
Benefitting
from
the
maximum
atom
utilization
efficiency,
special
size
quantum
effects
and
tailored
active
sites,
single-atom
catalysts
(SACs)
have
been
promising
candidates
for
bifunctional
toward
water
splitting.
Besides,
due
to
unique
structure
properties,
some
amorphous
materials
found
possess
better
performance
than
their
crystalline
counterparts
in
electrocatalytic
Herein,
by
combining
advantages
of
ruthenium
(Ru)
single
atoms
substrates,
molybdenum-based
oxide
stabilized
single-atomic-site
Ru
(Ru
SAs-MoO
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(12)
Опубликована: Янв. 30, 2024
Abstract
Efficient
dual‐single‐atom
catalysts
are
crucial
for
enhancing
atomic
efficiency
and
promoting
the
commercialization
of
fuel
cells,
but
addressing
sluggish
kinetics
hydrogen
oxidation
reaction
(HOR)
in
alkaline
media
facile
site
generation
remains
formidable
challenges.
Here,
we
break
local
symmetry
ultra‐small
ruthenium
(Ru)
nanoparticles
by
embedding
cobalt
(Co)
single
atoms,
which
results
release
Ru
atoms
from
on
reduced
graphene
oxide
(Co
1
1,n
/rGO).
In
situ
operando
spectroscopy
theoretical
calculations
reveal
that
oxygen‐affine
Co
atom
disrupts
nanoparticles,
resulting
parasitic
within
nanoparticles.
The
interaction
between
forms
effective
active
centers.
parasitism
modulates
adsorption
OH
intermediates
sites,
accelerating
HOR
through
faster
formation
*H
2
O.
As
anticipated,
/rGO
exhibits
ultrahigh
mass
activity
(7.68
A
mg
−1
)
at
50
mV
exchange
current
density
(0.68
mA
cm
−2
),
6
7
times
higher
than
those
Ru/rGO,
respectively.
Notably,
it
also
displays
exceptional
durability
surpassing
commercial
Pt
catalysts.
This
investigation
provides
valuable
insights
into
hybrid
multi‐single‐atom
metal
nanoparticle
catalysis.
Journal of Materials Chemistry A,
Год журнала:
2023,
Номер
12(2), С. 634 - 656
Опубликована: Дек. 2, 2023
This
review
summarizes
advances
in
bifunctional
electrocatalysts
and
electrolyzers
for
seawater
splitting,
including
various
catalysts
(
e.g.
,
phosphides,
chalcogenides,
borides,
nitrides,
(oxy)hydroxides)
membrane-based/membrane-less
systems.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Июнь 10, 2024
Abstract
The
rationalization
of
pH‐robust
catalysis
is
highly
desired
but
challengeable
for
overall
water
electrolysis
(WE).
It
requests
a
metal
active
site
that
can
make
an
efficient
adaption
with
both
cathodic
hydrogen
and
anodic
oxygen
evolution
reactions
(HER/OER).
Herein,
RuO
2‐x
/RuSe
2
heterostructure
electrocatalyst
profiled
interfacial
Se─Ru─O
bridge
the
splitting
studies.
An
asymmetric
bond
delta‐polarization
(Δp)
found
at
bridge,
including
Δp
>
0
Ru─O
part
<
Ru─Se
side
by
experiment
calculation
results.
enlarged
polarizability
(Δp
0)
in
principle
trigger
lattice
mediated
(LOM)
pathway
OER;
meanwhile,
reduced
benefit
HER
due
to
strengthened
d‐p
band
hybridization.
Resultantly,
deliver
ultralow
overpotentials
25/10
mV
Pt‐beyond
210/255
OER
10
mA
cm
−2
acidic/alkaline
media,
respectively.
In
especial,
acidic
WE
be
stably
operated
200
h
low
cell
voltage
1.478
V
.
This
research
clarifies
polarization
as
criterion
rational
design
catalysts.
Journal of Materials Chemistry A,
Год журнала:
2024,
Номер
12(7), С. 3844 - 3878
Опубликована: Янв. 1, 2024
This
review
provides
a
systematic
summary
of
the
nanostructure
engineering
Ru-modified
electrocatalysts
for
electrocatalytic
water
splitting.
These
regulation
strategies,
such
as
single
atom
sites,
doping,
alloying
and
interfacial
are
summarized
in
detail.
Acta Pharmaceutica Sinica B,
Год журнала:
2024,
Номер
14(5), С. 2298 - 2316
Опубликована: Янв. 26, 2024
Bacterial
infection
hampers
wound
repair
by
impeding
the
healing
process.
Concurrently,
inflammation
at
site
triggers
production
of
reactive
oxygen
species
(ROS),
causing
oxidative
stress
and
damage
to
proteins
cells.
This
can
lead
chronic
wounds,
posing
severe
risks.
Therefore,
eliminating
bacterial
reducing
ROS
levels
are
crucial
for
effective
healing.
Nanozymes,
possessing
enzyme-like
catalytic
activity,
convert
endogenous
substances
into
highly
toxic
substances,
such
as
ROS,
combat
bacteria
biofilms
without
inducing
drug
resistance.
However,
current
nanozyme
model
with
single
enzyme
activity
falls
short
meeting
complex
requirements
antimicrobial
therapy.
Thus,
developing
nanozymes
multiple
enzymatic
activities
is
essential.
Herein,
we
engineered
a
novel
metalloenzyme
called
Ru-procyanidin
nanoparticles
(Ru-PC
NPs)
diverse
aid
infections.
Under
acidic
conditions,
due
their
glutathione
(GSH)
depletion
peroxidase
(POD)-like
Ru-PC
NPs
combined
H2O2
exhibit
excellent
antibacterial
effects.
in
neutral
environment,
NPs,
catalase
(CAT)
decompose
O2,
alleviating
hypoxia
ensuring
sufficient
supply.
Furthermore,
possess
exceptional
antioxidant
capacity
through
superior
superoxide
dismutase
(SOD)
effectively
scavenging
excess
nitrogen
(RNS)
environment.
maintains
balance
system
prevents
inflammation.
also
promote
polarization
macrophages
from
M1
M2,
facilitating
More
importantly,
show
good
biosafety
negligible
toxicity.
In
vivo
models
have
confirmed
efficacy
inhibiting
promoting
The
focus
this
work
highlights
quadruple
its
potential
reduce
bacteria-infected
Energy & Environmental Science,
Год журнала:
2024,
Номер
17(19), С. 6897 - 6942
Опубликована: Янв. 1, 2024
This
review
focuses
on
the
latest
developments
in
direct
seawater
electrolysis,
specifically
electrocatalysts,
hybrid
anodic
oxidation,
and
electrolyzers,
providing
a
glimpse
into
future
of
environmentally
friendly
hydrogen
generation.
Advanced Functional Materials,
Год журнала:
2024,
Номер
34(27)
Опубликована: Март 1, 2024
Abstract
The
development
of
stable
and
efficient
electrocatalysts
for
overall
freshwater/seawater
water‐splitting
has
received
significant
attention.
In
this
study,
the
fabrication
electrocatalytic
properties
phosphorus‐enriched
PtP
2
dispersed
on
CoP
(PtP
/CoP)
HER
OER
in
both
alkaline
fresh/seawater
media
are
described.
Physical
characterization
density
functional
theory
calculations
reveal
that
strong
electronic
interfacial
interactions
between
optimized
reaction
kinetics
by
regulating
adsorption/desorption
intermediates
cleavage
reactants.
Additionally,
operando
electrochemical
impedance
spectroscopy
reveals
/CoP
significantly
decreased
phase
angle
with
increasing
applied
potential
compared
CoP,
demonstrating
construction
heterostructure
provides
a
faster
charge
transfer
surface
inner
layer.
Notably,
catalyst
only
requires
overpotentials
101
298
mV
to
achieve
benchmark
100
mA
cm
−2
freshwater
OER.
Moreover,
prepared
featured
108
330
an
seawater
electrolyte.
Furthermore,
high‐efficiency
water
electrolysis
operation
can
be
achieved
using
as
anode
cathode
(1.63
V@100
)
coupled
satisfactory
durability.
This
finding
deeper
comprehension
interaction
Pt‐less
compounds
matrix
electrocatalysis
bifunctional
electrocatalysts.
