Carbon Energy,
Journal Year:
2023,
Volume and Issue:
5(7)
Published: Feb. 24, 2023
Abstract
A
fuel
cell
is
an
energy
conversion
device
that
can
continuously
input
and
oxidant
into
the
through
electrochemical
reaction
to
release
electrical
energy.
Although
noble
metals
show
good
activity
in
cell‐related
reactions,
their
ever‐increasing
price
considerably
hinders
industrial
application.
Improvement
of
atom
utilization
efficiency
considered
one
most
effective
strategies
improve
mass
catalysts,
this
allows
for
use
fewer
saving
greatly
on
cost.
Thus,
single‐atom
catalysts
(SACs)
with
100%
have
been
widely
developed,
which
remarkable
performance
cells.
In
review,
we
will
describe
recent
progress
development
SACs
membrane
electrode
assembly
applications.
First,
introduce
several
routes
synthesis
SACs.
The
mechanism
involved
reactions
also
be
introduced
as
it
highly
determinant
final
activity.
Then,
systematically
summarize
application
Pt
group
metal
(PGM)
nonprecious
(non‐PGM)
This
review
offer
numerous
experiences
developing
potential
industrialized
future.
Advanced Materials,
Journal Year:
2022,
Volume and Issue:
35(2)
Published: Oct. 25, 2022
Pt
nanocatalysts
play
a
critical
role
in
direct
methanol
fuel
cells
(DMFCs)
due
to
their
appropriate
adsorption/desorption
energy,
yet
suffer
from
an
unbalanced
relationship
between
size-dependent
activity
and
stability.
Herein,
mixed-dimensional
Pt-Ni
alloy
polyhedral
nanochains
(Pt-Ni
PNCs)
with
ordered
assembly
of
nanopolyhedra-nanowire-nanopolyhedra
architecture
are
fabricated
as
bifunctional
electrocatalysts
for
DMFCs,
effectively
alleviating
the
size
effect.
The
PNCs
exhibit
7.23
times
higher
mass
anodic
oxidation
reaction
(MOR)
than
that
commercial
Pt/C.
In
situ
Fourier
transform
infrared
spectroscopy
CO
stripping
measurements
demonstrate
prominent
stability
resist
poisoning.
For
cathodic
oxygen
reduction
(ORR),
positive
half-wave
potential
exceeding
Pt/C
is
achieved
by
PNCs,
it
can
be
well
maintained
10
000
cycles
negligible
decay.
designed
nanostructure
alleviate
agglomeration
dissolution
problems
0D
small-sized
nanocrystals
enrich
surface
atom
steps
active
facets
1D
chain-like
nanostructures.
This
work
provides
proposed
strategy
improve
catalytic
performance
Pt-based
constructing
novel
interfacial
relationships
mixed
dimensions
imbalance
caused
effects.
Advanced Science,
Journal Year:
2023,
Volume and Issue:
10(7)
Published: Jan. 3, 2023
Abstract
The
construction
of
strong
interactions
and
synergistic
effects
between
small
metal
clusters
supports
offers
a
great
opportunity
to
achieve
high‐performance
cost‐effective
heterogeneous
catalysis,
however,
studies
on
its
applications
in
electrocatalysis
are
still
insufficient.
Herein,
it
is
reported
that
W
18
O
49
nanowires
supported
sub‐nanometric
Ru
(denoted
as
SNC/W
NWs)
constitute
an
efficient
bifunctional
electrocatalyst
for
hydrogen
evolution/oxidation
reactions
(HER
HOR)
under
acidic
condition.
Microstructural
analyses,
X‐ray
absorption
spectroscopy,
density
functional
theory
(DFT)
calculations
reveal
the
SNCs
with
average
RuRu
coordination
number
4.9
anchored
NWs
via
RuOW
bonds
at
interface.
metal‐support
interaction
leads
electron‐deficient
state
SNCs,
which
enables
modulated
RuH
strength.
Furthermore,
unique
proton
transport
capability
also
provides
potential
migration
channel
reaction
intermediates.
These
components
collectively
enable
remarkable
performance
2.5
times
exchange
current
than
carbon‐supported
nanoparticles,
even
rival
state‐of‐the‐art
Pt
catalyst.
This
work
new
prospect
development
electrocatalysis.
Angewandte Chemie International Edition,
Journal Year:
2023,
Volume and Issue:
62(26)
Published: April 28, 2023
Artificial
photosynthesis
is
a
promising
strategy
for
converting
carbon
dioxide
(CO2
)
and
water
(H2
O)
into
fuels
value-added
chemical
products.
However,
photocatalysts
usually
suffered
from
low
activity
product
selectivity
due
to
the
sluggish
dynamic
transfer
of
photoexcited
charge
carriers.
Herein,
we
describe
anchoring
Ag
single
atoms
on
hollow
porous
polygonal
C3
N4
nanotubes
(PCN)
form
photocatalyst
Ag1
@PCN
with
Ag-N3
coordination
CO2
photoreduction
using
H2
O
as
reductant.
The
as-synthesized
exhibits
high
CO
production
rate
0.32
μmol
h-1
(mass
catalyst:
2
mg),
(>94
%),
an
excellent
stability
in
long
term.
Experiments
density
functional
theory
(DFT)
reveal
that
strong
metal-support
interactions
(Ag-N3
favor
*CO2
adsorption,
*COOH
generation
desorption,
accelerate
carriers
between
atoms,
thereby
accounting
enhanced
selectivity.
This
work
provides
deep
insight
important
role
enhancing
photoactivity
photoreduction.
ACS Applied Energy Materials,
Journal Year:
2023,
Volume and Issue:
6(23), P. 12003 - 12012
Published: Nov. 28, 2023
The
development
of
heterostructures
for
precise
electron-transfer
paths
at
the
p–n
junction
interface
is
great
significance
photo/electrocatalytic
(EC)
applications.
In
this
paper,
we
have
presented
a
strategy
to
precisely
transfer
electrons
from
conduction
band
MoS2
valence
site
g-C3N4
through
Z-scheme
manner.
heterostructure
demonstrated
2-fold
improvement
in
catalytic
efficiency
20
wt
%
MoS2/g-C3N4
(18.04
mmol/gcat–1)
with
an
apparent
quantum
yield
(AQY)
H2
generation
approaching
34%
by
using
300
W
Xe
lamp.
enhanced
photocatalytic
(PC)
evolution
catalyst
shows
that
addition
NSs
causes
more
active
sites
and
prevention
electron–hole
pair
recombination
facilitating
increased
rate
electron
transport
interface.
addition,
required
lowest
overpotentials
410
262
mV
reach
mA
cm–2
current
density
OER
HER
performances,
respectively.
Subsequently,
impedance
spectroscopy
indicates
low
charge
resistance,
photoluminescence
analysis
showed
better-photogenerated
kinetics
heterostructures,
which
contributed
their
improved
photo/electrochemical
performance.
For
intriguing
applications
future,
study
offers
path
designing
synthesizing
chemically
linked
atomic
accuracy.
Further,
postphoto/electrocatalytic
characterizations
revealed
intact
geometry
catalyst,
indicating
long-term
durability
catalyst.
ACS Catalysis,
Journal Year:
2023,
Volume and Issue:
13(4), P. 2277 - 2285
Published: Jan. 30, 2023
Hydroxyl
(OH)
groups
are
widely
present
on
an
oxide
surface,
which
have
been
recognized
as
a
key
factor
affecting
surface
properties
of
the
and
interaction
metal
overlayer
with
oxide.
Here,
γ-alumina
(γ-Al2O3)
supports
different
OH
contents
prepared
by
calcinating
pseudo-boehmite
(AlOOH)
at
temperatures.
The
effect
oxidative
redispersion
supported
Ag
nanoparticles
including
migration
anchoring
species
has
explored
using
in
situ
X-ray
diffraction
UV–visible
spectroscopy,
well
ex
photoelectron
spectroscopy
transmission
electron
microscopy.
We
reveal
that
dispersion
capacity,
i.e.,
amount
anchored
associated
steady
state
is
thermodynamically
determined
contents,
while
rate
related
to
process
kinetically
limited
densities
low
loading.
higher
ability
observed
support
quicker
occurs
densities.
results
both
critical
particles
surfaces,
can
be
used
manipulate
Ag-catalyzed
CO
oxidation
reaction.
Journal of Materials Chemistry A,
Journal Year:
2023,
Volume and Issue:
11(16), P. 8540 - 8572
Published: Jan. 1, 2023
Metal–support
interactions
(MSIs)
is
essential
for
the
understanding
of
structure–performance
relationship
and
designing
in
heterogeneous
catalysis
area.
This
review
mainly
summarizes
current
theoretical
experimental
research
MSIs.
