Catalysts,
Год журнала:
2024,
Номер
14(12), С. 876 - 876
Опубликована: Ноя. 30, 2024
The
use
of
a
single-atom
FeN4
catalyst
on
defective
graphene
(Fe-NC)
has
recently
emerged
as
an
effective
method
for
the
synthesis
amino
acids.
Herein,
we
investigated
mechanism
alanine
formation
FeN4-doped
using
comprehensive
density
functional
theory
(DFT)
computations.
reaction
begins
with
activation
NO
molecules
surface,
followed
by
their
hydrogen
atoms
provided
in
system.
computational
results
show
that
can
be
effectively
activated
Fe-NC,
facilitating
subsequent
at
relatively
lower
potential.
potential-limiting
step
production
involves
either
HNO*
or
HNOH*
intermediates
Fe-NG,
free
energy
changes
(ΔG)
these
two
elementary
steps
are
nearly
equivalent.
Notably,
exhibits
higher
(Ea)
compared
to
formation.
This
study
provides
valuable
insights
into
C–N
coupling
and
acid
catalysts.
Advanced Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Июль 25, 2024
Over
the
last
decade,
carbon-based
metal-free
electrocatalysts
(C-MFECs)
have
become
important
in
electrocatalysis.
This
field
is
started
thanks
to
initial
discovery
that
nitrogen
atom
doped
carbon
can
function
as
a
electrode
alkaline
fuel
cells.
A
wide
variety
of
nanomaterials,
including
0D
dots,
1D
nanotubes,
2D
graphene,
and
3D
porous
carbons,
has
demonstrated
high
electrocatalytic
performance
across
applications.
These
include
clean
energy
generation
storage,
green
chemistry,
environmental
remediation.
The
applicability
C-MFECs
facilitated
by
effective
synthetic
approaches,
e.g.,
heteroatom
doping,
physical/chemical
modification.
methods
enable
creation
catalysts
with
properties
useful
for
sustainable
transformation
storage
(e.g.,
cells,
Zn-air
batteries,
Li-O
Environmental Science & Technology,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 6, 2025
As
primary
air
pollutants
from
fossil
fuel
combustion,
the
excess
emission
of
nitric
oxides
(NOx)
results
in
a
series
atmospheric
environmental
issues.
Although
selective
catalytic
reduction
technology
has
been
confirmed
to
be
effective
for
NOx
removal,
green
purification
and
value-added
conversion
under
ambient
conditions
are
still
facing
great
challenges,
especially
nitrogen
resource
recovery.
To
address
that,
photo-/electrocatalysis
offers
sustainable
routes
efficient
upcycling
temperature
pressure,
which
received
considerable
attention
scientific
communities.
In
this
review,
recent
advances
critically
summarized.
The
target
products
reaction
mechanisms
systems,
together
with
responsible
active
sites,
discussed,
respectively.
Then,
realistic
practicability
is
proposed,
including
strict
performance
evaluation
criteria
application
by
photo-/electrocatalysis.
Finally,
current
challenges
future
opportunities
proposed
terms
catalyst
design,
enhancement,
mechanism
understanding,
practical
conditions,
product
separation
techniques.
ACS Nano,
Год журнала:
2024,
Номер
18(35), С. 23894 - 23911
Опубликована: Авг. 20, 2024
The
C-N
coupling
reaction
demonstrates
broad
application
in
the
fabrication
of
a
wide
range
high
value-added
organonitrogen
molecules
including
fertilizers
(e.g.,
urea),
chemical
feedstocks
amines,
amides),
and
biomolecules
amino
acids).
electrocatalytic
pathways
from
waste
resources
like
CO
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 10, 2025
Abstract
Cascade
electrochemical‐chemical
coupling
(CECC)
involves
sequential
electrochemical
and
chemical
reactions,
using
intermediates
from
processes
as
reactants
for
subsequent
transformations
to
enhance
the
efficiency
selectivity
sustainable
syntheses
of
complex
chemicals.
Despite
its
economic
environmental
benefits,
CECC
still
faces
multiple
challenges,
including
a
low
utilization
intermediate
reactants,
competitive
side
difficulties
in
design
scale‐up
catalysts,
leading
yield.
To
ensure
economically
viable
CECC,
it
is
imperative
rationally
develop
cost‐efficient
high‐performance
such
carbon‐based
metal‐free
electrocatalysts
(C‐MFECs)
certain
carbon‐supported
transition
metal
with
high
activity
atomic
precision
desirable
products.
In
this
review,
an
overview
recent
advancements
doping
C‐MFECs
provided
enhancing
their
catalytic
toward
CECC.
Three
major
systems
based
on
are
discussed;
they
hydrogen
peroxide
coupling,
carbon
dioxide
upgrading,
redox‐mediated
systems.
Current
challenges
future
perspectives
emerging
field
also
addressed.
Advanced Materials,
Год журнала:
2024,
Номер
36(41)
Опубликована: Сен. 2, 2024
Abstract
Electrocatalytic
C‐N
coupling
between
NO
3
‐
and
CO
2
has
emerged
as
a
sustainable
route
for
urea
production.
However,
identifying
catalytic
active
sites
designing
efficient
electrocatalysts
remain
significant
challenges.
Herein,
the
synthesis
of
Cu‐doped
MnO
nanotube
(denoted
Cu‐MnO
)
with
stable
Cu
δ+
‐oxygen
vacancies
(O
vs
)‐Mn
3+
dual
is
reported.
Compared
pure
,
doping
can
effectively
enhance
production
performance
in
co‐reduction
.
Thus,
catalyst
exhibits
maximum
Faradaic
efficiency
(FE)
54.7%
highest
yield
rate
116.7
mmol
h
−1
g
cat.
flow
cell.
Remarkably,
remains
over
78
across
wide
potential
range.
Further
experimental
theoretical
results
elucidate
unique
role
solid‐solution
stabilizing
‐O
‐Mn
endowing
superior
structural
electrochemical
stabilities.
This
thermodynamically
promotes
formation
kinetically
lowers
energy
barrier
coupling.
Nanomaterials,
Год журнала:
2025,
Номер
15(1), С. 65 - 65
Опубликована: Янв. 2, 2025
Carbon
catalysts
have
shown
promise
as
an
alternative
to
the
currently
available
energy-intensive
approaches
for
nitrogen
fixation
(NF)
urea,
NH3,
or
related
nitrogenous
compounds.
The
primary
challenges
NF
are
natural
inertia
of
molecules
and
competitive
hydrogen
evolution
reaction
(HER).
Recently,
carbon-based
materials
made
significant
progress
due
their
tunable
electronic
structure
ease
defect
formation.
These
properties
significantly
enhance
electrocatalytic
photocatalytic
reduction
(NRR)
activity.
While
transition
metal-based
solved
kinetic
constraints
activate
bonds
via
donation-back-π
approach,
there
is
a
problem:
d-orbital
electrons
these
metal
atoms
tend
generate
H-metal
bonds,
inadvertently
amplifying
unwanted
HER.
Because
this,
timely
review
defective
electrocatalysts
imperative.
Such
will
succinctly
capture
recent
developments
in
both
experimental
theoretical
fields.
It
delve
into
multiple
engineering
advance
development
ideal
photocatalysts.
Furthermore,
this
carefully
explore
correlation
between
photocatalysts
Finally,
novel
introduced
obtain
more
efficient
performance
NF,
paving
way
sustainable
future.
ACS Applied Materials & Interfaces,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 16, 2025
The
renewable
electricity-driven
CO2
and
CO
reduction
represents
a
promising
approach
for
reducing
the
footprint
toward
carbon
neutrality.
Substantial
research
developments
have
been
achieved
in
designing
catalysts
reaction
interfaces
enhanced
electrocatalytic
activity
selectivity,
investigation
understanding
of
complex
mechanisms
also
extensively
investigated
by
both
situ
characterizations
theoretical
investigations.
Although
quasi-equilibrium
rate-determining
step
assumptions
are
widely
used
electrochemical
kinetics,
overall
rate
is
generally
determined
series
elementary
steps,
influence
certain
can
be
quantified
based
on
degree
control
theory.
For
complicated
networks
CO(2)
reduction,
not
only
steps
but
subsequent
selectivity-determining
play
critical
roles,
especially
product
selectivity.
In
this
Perspective,
we
summarize
strategies
that
tune
selectivity
their
impacts
respectively.
addition,
describe
coupling
electroreduction
with
other
(electro)chemical
reactions,
such
as
nitrite
methane
oxidation,
to
form
value-added
products.
At
end,
current
challenges
opportunities
field
discussed
inspire
further
development
next
stage.
Inorganic Chemistry,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 18, 2025
Concurrent
activation
and
conversion
of
N2
CO2
are
significance
yet
face
numerous
obstacles
due
to
the
large
dissociation
energies
N≡N
C═O
bonds.
Utilizing
a
specifically
developed
reflectron
time-of-flight
mass
spectrometer,
we
investigated
dual
mediated
by
copper
silver
ions
under
ambient
conditions.
Isotope
experiments
identified
that
both
can
be
effectively
activated
generate
N–O
coupling
product
(NO+),
especially
in
presence
ions,
NO+
attains
maximum
intensity
with
an
N2/CO2
ratio
1:2,
which
validates
three-molecule
reaction
mechanism,
namely,
+
2CO2
→
2NO
2CO.
Through
detailed
analyses
thermo-dynamics
dynamics,
illustrate
Cu+-catalyzed
mechanism
for
coupling,
validating
simply
plasma-assisted
single-ion
catalysis.