Environmental Science & Technology,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 25, 2025
Single-atom
catalysts
offer
exceptional
performance
but
face
practical
challenges
due
to
complex
synthesis
and
low
efficiency
caused
by
mass
transfer
resistance.
In
this
study,
based
on
a
simple
one-step
pyrolysis
method,
we
designed
Cu
single-atom
catalyst
with
high
active
site
exposure
locally
electron-deficient
environment
(HE
Cu1-N4)
achieve
maximum
utilization
in
electrocatalytic
nitrate
reduction
(NO3RR).
Using
advanced
characterization
techniques,
confirmed
that
its
unique
3D
structure
enhances
atom
reduces
(NO3-)
Synchrotron
radiation
DFT
calculations
showed
adjusting
the
coordination
induces
local
effect
atoms,
increasing
electrostatic
attraction
NO3-.
HE
Cu1-N4
achieved
100%
NH3
selectivity
across
wide
range
of
NO3-
concentrations,
an
yield
(5.09
mg
h-1
mgcat-1)
nearly
7-fold
higher
than
conventional
unmodified
(Cu1-N2,
0.73
mgcat-1).
Under
pilot-scale
conditions,
demonstrated
strong
resistance
interference
excellent
stability
water
systems.
A
modification
method
enhanced
single
atoms
catalysts,
significantly
improving
catalytic
activity
material.
Moreover,
straightforward
strategy
holds
promise
for
large-scale
production
paving
way
engineering
applications.
Energy & Fuels,
Год журнала:
2024,
Номер
38(8), С. 6701 - 6722
Опубликована: Апрель 8, 2024
Electrochemical
nitrate
reduction
is
the
process
of
converting
into
ammonia
or
nitrogen
using
electric
energy.
This
saves
energy,
protects
environment,
and
an
important
technology
for
resource
recovery
water
purification.
paper
examines
recent
advances
in
electrochemical
research
analyzes
reaction
mechanism
path
as
well
influence
various
factors
on
through
thermodynamic
kinetic
principles.
Second,
catalytic
performances
transition
metal
electrocatalysts
form
single
metals,
alloys,
oxides,
composites
are
analyzed
detail,
which
lays
foundation
rational
development
new,
efficient,
stable
electrocatalysts.
Finally,
future
directions
prospects
envisioned.
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 10, 2025
Abstract
The
local
electrolyte
micro‐environment
surrounding
the
catalyst
reaction
center,
including
critical
factors
such
as
pH,
reactant
concentration,
and
electric
field,
plays
a
decisive
role
in
electrocatalytic
reactions
water
splitting.
Recently,
this
topic
has
garnered
significant
attention
due
to
its
potential
significantly
enhance
catalytic
performance.
While
various
strategies
optimize
processes
have
been
explored,
deliberate
control
over
fundamental
principles
guiding
these
adjustments
remain
their
early
stages
of
development.
This
review
provides
comprehensive
examination
key
efforts
aimed
at
designing
tailoring
localized
micro‐environments
improve
It
discusses
advances
micro‐environmental
design,
methodologies
for
evaluating
shifts,
mechanistic
insights
driving
developments.
Additionally,
highlights
existing
challenges
prospective
industrial
applications
strategies.
By
offering
detailed
analysis
recent
developments,
aims
equip
researchers
with
practical
knowledge
on
controlling
micro‐environments,
thereby
accelerating
progress
toward
real‐world
processes.
ACS Sustainable Chemistry & Engineering,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 16, 2025
Electrocatalytically
converting
nitrates
in
sewage
to
ammonia,
which
can
not
only
achieve
the
purpose
of
eliminating
but
also
obtaining
valuable
is
an
effective
supplement
traditional
Haber–Bosch
process.
Although
significant
progress
has
been
made
cathodic
catalyst
design,
overall
ammonia
electrolysis
from
nitrate
reduction
still
restricted
by
anodic
oxygen
evolution
heavily
relying
on
noble-based
catalysts.
Herein,
a
bimetallic
NiFe-MOF
nanosheet
array
electrode
fabricated
and
serves
as
efficient
bifunctional
for
reactions.
The
introduction
Fe
Ni-MOF
facilitates
formation
structure
with
higher
electrochemical
active
surface
area,
well
provides
synergetic
NiFe
sites.
reaches
greatly
enhanced
yield
rate
0.94
mmol
cm–2
h–1
Faradaic
efficiency
90.8%
at
cathode
−0.6
V
versus
reversible
hydrogen
electrode,
reaction
declined
overpotential
424
mV
50
mA
cm–2.
As
electrocatalysis,
performance
comparable
that
using
Pt
mesh
counter
electrode.
Green
and
sustainable
electrocatalytic
conversion
of
nitrogen-containing
compounds
to
ammonia
are
currently
in
high
demand
order
replace
the
eco-unfriendly
Haber-Bosch
process.
Model
catalysts
for
nitrate
reduction
reaction
were
obtained
by
electrodeposition
metal
Co,
Fe
bimetallic
Fe/Co
nanoparticles
from
aqueous
solutions
onto
a
graphite
substrate.
The
samples
characterized
following
methods:
SEM,
XRD,
XPS,
UV-vis
spectroscopy,
cyclic
(and
linear)
voltammetry,
chronoamperometry
electrochemical
impedance
spectroscopy.
Besides,
determination
electrochemically
active
surface
was
also
performed
all
electrocatalysts.
best
electrocatalyst
sample
containing
Fe-nanoparticles
on
layer
Co-nanoparticles,
which
showed
Faradaic
efficiency
58.2%
(E=-0.785
V
vs.
RHE)
at
yield
rate
14.6
μmol
h-1
cm-2.
An
opinion
expressed
elucidation
mechanism
coordinated
action
electrocatalyst.
This
work
can
serve
primarily
as
starting
point
future
investigations
reactions
using
model
proposed
type.
