Nanomaterials,
Journal Year:
2023,
Volume and Issue:
13(21), P. 2850 - 2850
Published: Oct. 27, 2023
Ammonia
(NH3)
is
widely
used
in
various
fields,
and
it
also
considered
a
promising
carbon
free
energy
carrier,
due
to
its
high
hydrogen
content.
The
nitrogen
reduction
reaction
(NRR),
which
converts
into
ammonia
by
using
protons
from
water
as
the
source,
receiving
lot
of
attention,
since
effective
process
optimization
would
make
possible
overcome
Haber–Bosch
method.
In
this
study,
we
solution-based
approach
obtain
functionalized
porous
Ni
foam
substrates
with
small
amount
gold
(<0.1
mg
cm−1).
We
investigated
several
deposition
conditions
obtained
different
morphologies.
electrochemical
performance
catalysts
on
evolution
(HER)
NRR
has
been
characterized.
production
yield
was
determined
chronoamperometry
experiments
at
potentials,
results
showed
maximum
rate
20
µg
h−1
mgcat−1
Faradaic
efficiency
5.22%.
This
study
demonstrates
potential
gold-based
for
sustainable
highlights
importance
optimizing
improve
selectivity
toward
HER.
Small,
Journal Year:
2023,
Volume and Issue:
20(17)
Published: Nov. 30, 2023
Abstract
Ambient
electrocatalytic
nitrogen
(N
2
)
reduction
has
gained
significant
recognition
as
a
potential
substitute
for
producing
ammonia
(NH
3
).
However,
N
adsorption
and
*NN
protonation
activation
reaction
with
the
competing
hydrogen
evolution
remain
daunting
challenge.
Herein,
defect‐rich
TiO
nanosheet
electrocatalyst
PdCu
alloy
nanoparticles
(PdCu/TiO
2−x
is
designed
to
elucidate
reactivity
selectivity
trends
of
cleavage
path
‐to‐NH
catalytic
conversion.
The
introduction
oxygen
vacancy
(OV)
not
only
acts
active
sites
but
also
effectively
promotes
electron
transfer
from
Pd‐Cu
high‐concentration
Ti
3+
sites,
thus
lends
via
donation
PdCu.
OVs‐mediated
control
lowers
barrier
*N
H
*H
facilitates
first
hydrogenation
process
activation.
Consequently,
PdCu/TiO
catalyst
attains
high
rate
NH
evolution,
reaching
5.0
mmol
g
cat.
−1
h
.
This
work
paves
pathway
defect‐engineering
metal‐supported
electrocatalysts
high‐efficient
electrosynthesis.
ACS Sustainable Chemistry & Engineering,
Journal Year:
2023,
Volume and Issue:
11(37), P. 13709 - 13717
Published: Sept. 1, 2023
TiO2-based
two-dimensional
nanosheet
composite
materials
are
promising
photocatalysts
for
water
splitting.
The
mesoporous
structure
possesses
a
high
surface-to-volume
ratio
with
more
active
sites.
It
is
fantastic
to
integrate
the
advantages
of
porous
into
materials.
calcined
ultrathin
layered
double
hydroxides
(LDHs)
metal
oxide
nanosheets,
which
considered
ideal
templates
construct
photocatalysts.
In
this
work,
we
report
design
and
fabrication
amorphous
aluminum
oxide-supported
anatase
TiO2/spinel
Co3O4
(TiO2/Co3O4)
nanosheets
by
calcinating
TiO2/CoAl-LDH
precursors.
built-in
electric
field
in
TiO2/Co3O4
interface
facilitates
charge
transfer,
acts
as
cocatalyst
further
enhance
oxygen
evolution
reaction
activity.
Consequently,
photocatalyst
exhibits
excellent
photocatalytic
performances
O2
H2.
This
strategy
preparing
expected
extend
other
semiconductor
systems.
Materials,
Journal Year:
2024,
Volume and Issue:
17(10), P. 2239 - 2239
Published: May 9, 2024
The
electrocatalytic
nitrogen
reduction
reaction
(NRR)
for
synthesizing
ammonia
holds
promise
as
an
alternative
to
the
traditional
high-energy-consuming
Haber-Bosch
method.
Rational
and
accurate
catalyst
design
is
needed
overcome
challenge
of
activating
N2
suppress
competitive
hydrogen
evolution
(HER).
Single-atom
catalysts
have
garnered
widespread
attention
due
their
100%
atom
utilization
efficiency
unique
catalytic
performance.
In
this
context,
we
constructed
theoretical
models
metal
single-atom
supported
on
titanate
nanosheets
(M-TiNS).
Initially,
density
functional
theory
(DFT)
was
employed
screen
12
NRR-
HER-related
barriers,
leading
identification
theoretically
optimal
NRR
catalyst,
Ru-TiNS.
Subsequently,
experimental
synthesis
Ru-TiNS
successfully
achieved,
exhibiting
excellent
performance
in
catalyzing
NRR,
with
highest
NH3
yield
rate
reaching
15.19
μmol
mgcat-1
h-1
a
Faradaic
(FE)
15.3%.
combination
results
calculations
demonstrated
efficient
ability
Ru
sites,
validating
effectiveness
screening
process
providing
foundation
catalysts.
Nanoscale,
Journal Year:
2024,
Volume and Issue:
16(22), P. 10727 - 10736
Published: Jan. 1, 2024
The
synergistic
effect
of
atomically
dispersed
Cu
species
and
Ti-defects
on
hierarchical
TiO
2
significantly
enhances
the
separation
photogenerated
charges,
thereby
promoting
highly
selective
conversion
CO
into
CO,
mediated
by
water.
Nanoscale,
Journal Year:
2024,
Volume and Issue:
16(37), P. 17300 - 17323
Published: Jan. 1, 2024
Electrochemical
ammonia
synthesis
presents
a
sustainable
alternative,
offering
the
potential
for
enhanced
energy
efficiency
and
environmental
benefits
compared
to
conventional
Haber-Bosch
process.
