Small,
Journal Year:
2023,
Volume and Issue:
19(42)
Published: June 15, 2023
Abstract
Dual‐Active‐Sites
Single‐Atom
catalysts
(DASs
SACs)
are
not
only
the
improvement
of
SACs
but
also
expansion
dual‐atom
catalysts.
The
DASs
contains
dual
active
sites,
one
which
is
a
single
atomic
site,
and
other
site
can
be
atom
or
type
endowing
with
excellent
catalytic
performance
wide
range
applications.
categorized
into
seven
types,
including
neighboring
mono
metallic
SACs,
bonded
non‐bonded
bridged
asymmetric
metal
nonmetal
combined
space
separated
SACs.
Based
on
above
classification,
general
methods
for
preparation
comprehensively
described,
especially
their
structural
characteristics
discussed
in
detail.
Meanwhile,
in‐depth
assessments
variety
applications
electrocatalysis,
thermocatalysis
photocatalysis
provided,
as
well
unique
mechanism
addressed.
Moreover,
prospects
challenges
related
highlighted.
authors
believe
great
expectations
this
review
will
provide
novel
conceptual
methodological
perspectives
exciting
opportunities
further
development
application
ACS Catalysis,
Journal Year:
2023,
Volume and Issue:
13(16), P. 11127 - 11135
Published: Aug. 9, 2023
Dual-atom
catalysts
(DACs)
are
getting
extensive
attention
in
electrocatalysis
due
to
their
high
metal-loading
rate,
tunable
active
centers,
and
electron
states.
However,
developing
dual-metal
sites
coordinating
with
different
atoms
is
still
under
explored.
Herein,
the
highly
Fe2N5P
supported
by
P-doped
hollow
carbons
demonstrated
catalyze
oxygen
reduction
reaction
(ORR).
The
carbon
template
was
constructed
from
core-shelled
covalent
metal–organic
frameworks,
which
showed
surface
areas
abundant
N
P
for
anchoring
dual-Fe
atoms.
Fe2@P-HC
has
catalytic
of
a
Fe
content
1.8
wt
%,
shows
activity
selectivity
toward
ORR
half-wave
potential
0.89
or
0.75
V
vs
RHE
alkaline
acidic
condition
4e–
pathway.
theoretical
calculations
reveal
that
facilitate
OOH*
formation
thus
improve
activity.
This
work
provides
strategy
design
new
COFs.
Carbon Energy,
Journal Year:
2023,
Volume and Issue:
5(5)
Published: Jan. 4, 2023
Abstract
Metal–organic
frameworks
and
covalent
organic
have
been
widely
employed
in
electrochemical
catalysis
owing
to
their
designable
skeletons,
controllable
porosities,
well‐defined
catalytic
centers.
However,
the
poor
chemical
stability
low
electron
conductivity
limited
activity,
single‐functional
sites
these
hindered
them
show
multifunctional
roles
systems.
Herein,
we
constructed
novel
metal
polymers
(Co‐HAT‐CN
Ni‐HAT‐CN)
with
dual
centers
(metal–N
4
metal–N
2
)
catalyze
oxygen
reduction
reaction
(ORR)
evolution
(OER).
By
using
different
centers,
activity
selectivity
were
well‐tuned.
Among
them,
Co‐HAT‐CN
catalyzed
ORR
a
4e
−
pathway,
half‐wave
potential
of
0.8
V
versus
RHE,
while
Ni‐HAT‐CN
2e
pathway
H
O
over
90%.
Moreover,
delivered
an
overpotential
350
mV
at
10
mA
cm
−2
corresponding
Tafel
slope
24
dec
−1
for
OER
1.0
M
KOH
aqueous
solution.
The
experimental
results
revealed
that
activities
toward
due
M–N
frameworks,
both
contributed
OER.
This
work
gives
us
new
platform
construct
bifunctional
catalysts.
Advanced Materials,
Journal Year:
2023,
Volume and Issue:
35(30)
Published: April 19, 2023
Metal
phthalocyanine
(MPc)
material
with
a
well-defined
MN4
moiety
offers
platform
for
catalyzing
the
oxygen
reduction
reaction
(ORR),
while
practical
performance
is
often
limited
by
insufficient
O2
adsorption
due
to
planar
configuration.
Here,
design
(called
Gr-MG
-O-MP
Pc)
proposed,
where
metal
of
MPc
(MP
)
axially
coordinated
single
atom
in
graphene
(Gr-MG
through
bridge-bonded
(O),
introducing
effective
out-of-plane
polarization
promote
on
MPc.
Manipulating
charge
varying
types
MP
and
MG
=
Fe/Co/Ni,
Ti/V/Cr/Mn/Fe/Co/Ni)
axial
coordination
zone
-MG
-
are
examined
density
functional
theory
simulations.
Among
them,
catalyst
Gr-V-O-FePc
stands
out
highest
calculated
energy,
which
synthesized
successfully
verified
systemic
X-ray
absorption
spectroscopy
measurements.
Importantly,
it
delivers
remarkable
ORR
half-wave
potential
0.925
V
(versus
reversible
hydrogen
electrode)
kinetic
current
26.7
mA
cm-2
.
This
thus
demonstrates
new
simple
way
pursue
high
catalytic
inducing
catalysts.
Small,
Journal Year:
2023,
Volume and Issue:
19(42)
Published: June 15, 2023
Abstract
Dual‐Active‐Sites
Single‐Atom
catalysts
(DASs
SACs)
are
not
only
the
improvement
of
SACs
but
also
expansion
dual‐atom
catalysts.
The
DASs
contains
dual
active
sites,
one
which
is
a
single
atomic
site,
and
other
site
can
be
atom
or
type
endowing
with
excellent
catalytic
performance
wide
range
applications.
categorized
into
seven
types,
including
neighboring
mono
metallic
SACs,
bonded
non‐bonded
bridged
asymmetric
metal
nonmetal
combined
space
separated
SACs.
Based
on
above
classification,
general
methods
for
preparation
comprehensively
described,
especially
their
structural
characteristics
discussed
in
detail.
Meanwhile,
in‐depth
assessments
variety
applications
electrocatalysis,
thermocatalysis
photocatalysis
provided,
as
well
unique
mechanism
addressed.
Moreover,
prospects
challenges
related
highlighted.
authors
believe
great
expectations
this
review
will
provide
novel
conceptual
methodological
perspectives
exciting
opportunities
further
development
application
