ACS Nano,
Год журнала:
2022,
Номер
16(12), С. 19959 - 19979
Опубликована: Дек. 15, 2022
To
utilize
intermittent
renewable
energy
as
well
achieve
the
goals
of
peak
carbon
dioxide
emissions
and
neutrality,
various
electrocatalytic
devices
have
been
developed.
However,
reactions,
e.g.,
hydrogen
evolution
reaction/oxygen
reaction
in
overall
water
splitting,
polysulfide
conversion
lithium–sulfur
batteries,
formation/decomposition
lithium
peroxide
lithium–oxygen
nitrate
reduction
to
degrade
sewage,
suffer
from
sluggish
kinetics
caused
by
multielectron
transfer
processes.
Owing
merits
accelerated
charge
transport,
optimized
adsorption/desorption
intermediates,
raised
conductivity,
regulation
microenvironment,
ease
combine
with
geometric
characteristics,
built-in
electric
field
(BIEF)
is
expected
overcome
above
problems.
Here,
we
give
a
Review
about
very
recent
progress
BIEF
for
efficient
electrocatalysis.
First,
construction
strategies
characterization
methods
(qualitative
quantitative
analysis)
are
summarized.
Then,
up-to-date
overviews
engineering
electrocatalysis,
attention
on
electron
structure
optimization
microenvironment
modulation,
analyzed
discussed
detail.
In
end,
challenges
perspectives
proposed.
This
gives
deep
understanding
design
electrocatalysts
next-generation
storage
devices.
Angewandte Chemie International Edition,
Год журнала:
2022,
Номер
61(45)
Опубликована: Авг. 23, 2022
Directly
splitting
seawater
to
produce
hydrogen
provides
a
promising
pathway
for
energy
and
environmental
sustainability.
However,
current
faces
many
challenges
because
of
the
sluggish
kinetics,
presence
impurities,
membrane
contamination,
competitive
chloride
oxidation
reaction
at
anode,
which
makes
it
more
difficult
than
freshwater
splitting.
This
Review
firstly
introduces
basic
mechanisms
anode
cathode
reactions
during
We
critically
analyze
primary
principles
designing
catalysts
in
terms
both
oxygen
evolution
reactions,
including
with
noble
metal,
metal
free,
metal-free
catalysts.
Strategies
design
effective
catalysts,
such
as
active
site
population,
synergistic
effect
regulation,
surface
engineering,
are
discussed.
Furthermore,
promises,
perspectives,
developing
technologies
clean
generation
summarized.
Advanced Materials,
Год журнала:
2023,
Номер
35(24)
Опубликована: Апрель 14, 2023
Urea
oxidation
reaction
(UOR)
is
an
ideal
replacement
of
the
conventional
anodic
oxygen
evolution
(OER)
for
efficient
hydrogen
production
due
to
favorable
thermodynamics.
However,
UOR
activity
severely
limited
by
high
potential
Ni-based
catalysts
form
Ni3+
,
which
considered
as
active
site
UOR.
Herein,
using
in
situ
cryoTEM,
cryo-electron
tomography,
and
Raman,
combined
with
theoretical
calculations,
a
multistep
dissolution
process
nickel
molybdate
hydrate
reported,
whereby
NiMoO4
·xH2
O
nanosheets
exfoliate
from
bulk
·H2
nanorods
Mo
species
crystalline
water,
further
results
superthin
amorphous
(II)
hydroxide
(ANH)
flocculus
catalyst.
Owing
structure,
ANH
catalyst
can
be
oxidized
NiOOH
at
much
lower
than
Ni(OH)2
finally
exhibits
more
order
magnitude
higher
current
density
(640
mA
cm-2
),
30
times
mass
activity,
27
TOF
those
The
mechanism
provides
effective
methodology
preparation
highly
catalysts.
Abstract
Transition‐metal‐based
layered
double
hydroxides
(TM‐LDHs)
nanosheets
are
promising
electrocatalysts
in
the
renewable
electrochemical
energy
conversion
system,
which
regarded
as
alternatives
to
noble
metal‐based
materials.
In
this
review,
recent
advances
on
effective
and
facile
strategies
rationally
design
TM‐LDHs
electrocatalysts,
such
increasing
number
of
active
sties,
improving
utilization
sites
(atomic‐scale
catalysts),
modulating
electron
configurations,
controlling
lattice
facets,
summarized
compared.
Then,
these
fabricated
for
oxygen
evolution
reaction,
hydrogen
urea
oxidation
nitrogen
reduction
small
molecule
oxidations,
biomass
derivatives
upgrading
is
articulated
through
systematically
discussing
corresponding
fundamental
principles
reaction
mechanism.
Finally,
existing
challenges
density
catalytically
future
prospects
nanosheets‐based
each
application
also
commented.
Chemical Society Reviews,
Год журнала:
2024,
Номер
53(3), С. 1552 - 1591
Опубликована: Янв. 1, 2024
This
review
evaluates
state-of-the-art
advances
in
electrocatalytic
and
photo(electro)catalytic
urea
oxidation
from
fundamentals
materials
to
energy
environmental
applications.
Dalton Transactions,
Год журнала:
2023,
Номер
52(37), С. 13161 - 13168
Опубликована: Янв. 1, 2023
Urea
electrolysis
can
be
used
to
treat
wastewater
containing
urea
and
alleviate
the
energy
crisis,
so
it
is
one
of
best
ways
solve
environmental
problems.
This
paper
reports
synthesis
M
doped
NiVS
(M
=
Co,
Ce
Cr)
composites
by
a
simple
hydrothermal
process
for
first
time.
What
noteworthy
that
Ce-NiVS
material
as
catalytic
electrode
requires
only
141
mV
overpotential
hydrogen
evolution
reaction
(HER)
1.291
V
potential
oxidation
(UOR)
at
current
density
10
mA
cm-2
in
1.0
KOH
0.5
mixed
alkaline
solution.
Using
Ce-NiVS/NF
both
anode
cathode
electrolysis,
driven
voltage
1.55
V,
which
better
than
most
previous
catalysts.
Experimental
results
demonstrate
excellent
activity
materials
due
formation
large
number
active
sites
improvement
conductivity
doping
with
Ce.
Density
functional
theory
calculation
shows
VS4
has
small
Gibbs
free
adsorption,
plays
major
role
production
process,
Ce-NiS
higher
states
(DOS)
near
Fermi
level,
indicating
electronic
conductivity.
The
synergistic
catalysis
promoted
performance
material.
work
provides
guidance
optimization
design
low-cost
electrocatalysts
replace
expensive
precious
metal-based
overall
electrolysis.
Advanced Functional Materials,
Год журнала:
2023,
Номер
33(25)
Опубликована: Март 16, 2023
Abstract
The
electrochemical
urea
oxidation
reaction
(UOR)
is
an
alternative
to
electrooxidation
of
water
for
energy–saving
hydrogen
(H
2
)
production.
To
maximize
this
purpose,
design
catalysts
selective
urea‐to‐nitrite
(NO
–
with
increased
electron
transfer
and
high
current
practically
important.
Herein,
a
cobalt,
germanium
(Co,
Ge)
co‐doped
nickel
(Ni)
oxyhydroxide
catalyst
reported
first
time
that
directs
urea‐to‐NO
conversion
significant
Faradaic
efficiency
84.9%
at
1.4
V
versus
reversible
electrode
significantly
boosts
UOR
activity
448.0
mA
cm
−2
.
Importantly,
performance
greater
than
most
Ni‐based
catalysts.
Based
on
judiciously
combined
synchrotron‐based
measurement,
in
situ
spectroscopy
density
functional
theoretical
computation,
boosted
production
results
from
Co,
Ge
co‐doping
demonstrated
optimizes
electronic
structure
Ni
sites
which
adsorption
altered
as
NO‐terminal
configuration
facilitate
CN
cleavage
*NH
formation,
thereby
expedites
pathway
NO
conversion.
Findings
highlight
the
importance
tuning
intermediate
behavior
high‐performance
electrocatalysts,
will
be
practical
benefit
range
researchers
manufacturers
replacing
conventional
energy‐saving
H
