Journal of Materials Chemistry A,
Год журнала:
2023,
Номер
11(7), С. 3315 - 3363
Опубликована: Янв. 1, 2023
This
article
discusses
the
relationship
between
single-atom
sites
and
catalytic
mechanism
of
functional
MOFs
which
is
related
to
coordination
environment
metal
ions,
also
summarizes
research
progress
MOF-derived
SACs
in
recent
years.
Chemical Society Reviews,
Год журнала:
2021,
Номер
50(8), С. 5281 - 5322
Опубликована: Янв. 1, 2021
This
review
presents
the
recent
advances
in
synthetic
strategies,
characterisation,
and
computations
of
carbon-based
single-atom
catalysts,
as
well
their
innovative
applications
mechanisms
advanced
oxidation
technologies.
Chemical Society Reviews,
Год журнала:
2021,
Номер
50(13), С. 7745 - 7778
Опубликована: Янв. 1, 2021
Bifunctional
oxygen
reduction
and
evolution
constitute
the
core
processes
for
sustainable
energy
storage.
The
advances
on
noble-metal-free
bifunctional
electrocatalysts
are
reviewed.
Angewandte Chemie International Edition,
Год журнала:
2021,
Номер
60(25), С. 14005 - 14012
Опубликована: Март 31, 2021
Abstract
Dual‐metal
single‐atom
catalysts
exhibit
superior
performance
for
oxygen
reduction
reaction
(ORR),
however,
the
synergistic
catalytic
mechanism
is
not
deeply
understood.
Herein,
we
report
a
dual‐metal
catalyst
consisted
of
Cu−N
4
and
Zn−N
on
N‐doped
carbon
support
(Cu/Zn−NC).
It
exhibits
high‐efficiency
ORR
activity
with
an
E
onset
0.98
V
1/2
0.83
V,
excellent
stability
(no
degradation
after
10
000
cycles),
surpassing
state‐of‐the‐art
Pt/C
great
mass
Pt‐free
single
atom
catalysts.
Operando
XANES
demonstrates
that
as
active
center
experiences
change
from
atomic
dispersion
to
cluster
cooperation
during
process,
then
turns
state
again
reaction.
DFT
calculation
further
indicates
adjustment
effect
Zn
d‐orbital
electron
distribution
Cu
could
benefit
stretch
cleavage
O‐O
center,
speeding
up
process
rate
determining
step
OOH*.
Artificial
photocatalytic
energy
conversion
represents
a
highly
intriguing
strategy
for
solving
the
crisis
and
environmental
problems
by
directly
harvesting
solar
energy.
The
development
of
efficient
photocatalysts
is
central
task
pushing
real-world
application
reactions.
Due
to
maximum
atomic
utilization
efficiency
distinct
advantages
outstanding
catalytic
activity,
single-atom
catalysts
(SACs)
have
emerged
as
promising
candidates
photocatalysts.
In
current
review,
recent
progresses
challenges
on
SACs
systems
are
presented.
Fundamental
principles
focusing
charge
separation/transfer
molecular
adsorption/activation
photocatalysis
systemically
explored.
We
outline
how
isolated
reactive
sites
facilitate
photogenerated
electron–hole
transfer
promote
construction
photoactivation
cycles.
widespread
adoption
in
diverse
reactions
also
comprehensively
introduced.
By
presenting
these
advances
addressing
some
future
with
potential
solutions
related
integral
over
SACs,
we
expect
shed
light
forthcoming
research
conversion.
Advanced Materials,
Год журнала:
2021,
Номер
33(49)
Опубликована: Окт. 8, 2021
Abstract
Polynary
transition‐metal
atom
catalysts
are
promising
to
supersede
platinum
(Pt)‐based
for
oxygen
reduction
reaction
(ORR).
Regulating
the
local
configuration
of
atomic
is
key
catalyst
performance
enhancement.
Different
from
previously
reported
single‐atom
or
dual‐atom
configurations,
a
new
type
ternary‐atom
catalyst,
which
consists
atomically
dispersed,
nitrogen‐coordinated
Co–Co
dimers,
and
Fe
single
sites
(i.e.,
Co
2
–N
6
Fe–N
4
structures)
that
coanchored
on
highly
graphitized
carbon
supports
developed.
This
unique
ORR
outperforms
with
only
in
both
alkaline
acid
conditions.
Density
functional
theory
calculations
clearly
unravels
synergistic
effect
sites,
can
induce
higher
filling
degree
Fe–d
orbitals
favors
binding
capability
*OH
intermediates
(the
rate
determining
step).
may
be
alternative
Pt
drive
cathodic
zinc–air
batteries.
Chemical Reviews,
Год журнала:
2021,
Номер
121(21), С. 13620 - 13697
Опубликована: Окт. 13, 2021
Supported
single-metal
atom
catalysts
(SACs)
are
constituted
of
isolated
active
metal
centers,
which
heterogenized
on
inert
supports
such
as
graphene,
porous
carbon,
and
oxides.
Their
thermal
stability,
electronic
properties,
catalytic
activities
can
be
controlled
via
interactions
between
the
center
neighboring
heteroatoms
nitrogen,
oxygen,
sulfur.
Due
to
atomic
dispersion
amount
required
for
catalysis
decreased,
thus
offering
new
possibilities
control
selectivity
a
given
transformation
well
improve
catalyst
turnover
frequencies
numbers.
This
review
aims
comprehensively
summarize
synthesis
Fe-SACs
with
focus
anchoring
single
atoms
(SA)
carbon/graphene
supports.
The
characterization
these
advanced
materials
using
various
spectroscopic
techniques
their
applications
in
diverse
research
areas
described.
When
applicable,
mechanistic
investigations
conducted
understand
specific
behavior
Fe-SACs-based
highlighted,
including
use
theoretical
models.
Applied Catalysis B Environment and Energy,
Год журнала:
2021,
Номер
287, С. 119953 - 119953
Опубликована: Фев. 6, 2021
Metal-organic
frameworks
(MOFs)
have
recently
emerged
as
promising
precursors
to
construct
efficient
non-noble
metal
electrocatalyst
for
oxygen
evolution
reaction
(OER).
Herein,
a
Co-Ni-Fe
spinel
oxide-carbonitrides
hybrids
(CoNiFeOx-NC)
with
hierarchical
structure
was
synthesized
from
Fe-MIL-101-NH2
through
unique
ion-exchange
based
strategy.
The
ion
exchange
of
both
Ni
and
Co
ions
induced
hierarchically
structured
2-D
ternary
MOF
shell
layer
encapsulated
3-D
octahedral
crystals
core.
This
prevents
the
collapse
during
air
calcination
process
affords
highly
porous
large
surface
area.
Additionally,
combination
in
oxides
derived
core-shell
provides
favorable
electronic
environment
adsorption
OER
intermediates,
which
further
verified
by
XPS
characterizations
DFT
calculations.
study
revealed
Ni-Co
coordinated
Oh
sites
MFe2O4
reverse
structures
main
active
sites,
tuned
binding
strength
species
catalyst
electron
transfer
Fe→Co→Ni,
thereby
lowered
energy
barriers
OER.
As
result,
rationally
designed
CoNiFeOx-NC
manifests
superior
performance
low
overpotential
265
mV
at
50
mA
cm−2
decent
Tafel
slope
64.1
dec-1.
strategy
may
serve
versatile
platform
rational
design
synthesis
multi-metallic
electrocatalysts.