Advanced Energy Materials,
Год журнала:
2018,
Номер
8(21)
Опубликована: Май 9, 2018
Abstract
It
is
of
great
significance
to
develop
highly
efficient
and
superior
stable
oxygen
evolution
reaction
(OER)
electrocatalysts
for
upcoming
electrochemical
conversion
technologies
clean
energy
systems.
Here,
an
assembled
3D
electrode
synthesized
by
a
one‐step
solvothermal
process
using
such
original
OER
electrocatalyst.
During
the
process,
Ni
ions
released
from
foam
in
acidic
solution
Fe
added
exogenously
act
as
metal
centers
coordinate
with
terephthalic
acid
(TPA)
organic
molecules
robust
bonds,
finally,
NiFe‐based
metal–organic
framework
(MOF)
nanosheets
situ
grown
on
foam,
i.e.,
MIL‐53(FeNi)/NF,
are
prepared.
This
binder‐free
shows
activity
high
current
density
(50
mA
cm
−2
)
at
overpotential
233
mV,
Tafel
slope
31.3
mV
dec
−1
,
excellent
stability
alkaline
aqueous
(1
m
KOH).
discovered
that
introduction
into
MIL‐53
structure
increases
electrochemically‐active
areas
well
sites,
accelerated
electron
transport
capability,
modulated
electronic
enhance
catalytic
performance.
Besides,
first
principles
calculations
show
MIL‐53(FeNi)
more
favorable
foreign
atoms'
adsorption
has
increased
3d
orbital
boosting
intrinsic
activity.
work
elucidates
promising
enriches
direct
application
MOF
materials.
Advanced Materials,
Год журнала:
2019,
Номер
32(3)
Опубликована: Апрель 1, 2019
Abstract
Electrochemical
water
splitting
is
a
promising
technology
for
sustainable
conversion,
storage,
and
transport
of
hydrogen
energy.
Searching
earth‐abundant
hydrogen/oxygen
evolution
reaction
(HER/OER)
electrocatalysts
with
high
activity
durability
to
replace
noble‐metal‐based
catalysts
plays
paramount
importance
in
the
scalable
application
electrolysis.
A
freestanding
electrode
architecture
highly
attractive
as
compared
conventional
coated
powdery
form
because
enhanced
kinetics
stability.
Herein,
recent
progress
developing
transition‐metal‐based
HER/OER
electrocatalytic
materials
reviewed
selected
examples
chalcogenides,
phosphides,
carbides,
nitrides,
alloys,
phosphates,
oxides,
hydroxides,
oxyhydroxides.
Focusing
on
self‐supported
electrodes,
latest
advances
their
structural
design,
controllable
synthesis,
mechanistic
understanding,
strategies
performance
enhancement
are
presented.
Remaining
challenges
future
perspectives
further
development
also
discussed.
Journal of the American Chemical Society,
Год журнала:
2018,
Номер
140(25), С. 7748 - 7759
Опубликована: Май 22, 2018
Water
splitting
is
the
essential
chemical
reaction
to
enable
storage
of
intermittent
energies
such
as
solar
and
wind
in
form
hydrogen
fuel.
The
oxygen
evolution
(OER)
often
considered
bottleneck
water
splitting.
Though
metal
oxides
had
been
reported
OER
electrocatalysts
more
than
half
a
century
ago,
recent
interest
renewable
energy
has
spurred
renaissance
studies
transition
Earth-abundant
nonprecious
catalysts.
This
Perspective
presents
major
progress
several
key
areas
field
theoretical
understanding,
activity
trend,
situ
operando
characterization,
active
site
determination,
novel
materials.
A
personal
overview
past
achievements
future
challenges
also
provided.
Advanced Materials,
Год журнала:
2021,
Номер
33(31)
Опубликована: Июнь 12, 2021
Abstract
Hydrogen
economy
has
emerged
as
a
very
promising
alternative
to
the
current
hydrocarbon
economy,
which
involves
process
of
harvesting
renewable
energy
split
water
into
hydrogen
and
oxygen
then
further
utilization
clean
fuel.
The
production
by
electrolysis
is
an
essential
prerequisite
with
zero
carbon
emission.
Among
various
technologies,
alkaline
splitting
been
commercialized
for
more
than
100
years,
representing
most
mature
economic
technology.
Here,
historic
development
overviewed,
several
critical
electrochemical
parameters
are
discussed.
After
that,
advanced
nonprecious
metal
electrocatalysts
that
recently
negotiating
evolution
reaction
(OER)
(HER)
discussed,
including
transition
oxides,
(oxy)hydroxides,
chalcogenides,
phosphides,
nitrides
OER,
well
alloys,
carbides
HER.
In
this
section,
particular
attention
paid
catalyst
synthesis,
activity
stability
challenges,
performance
improvement,
industry‐relevant
developments.
Some
recent
works
about
scaled‐up
novel
electrode
designs,
seawater
also
spotlighted.
Finally,
outlook
on
future
challenges
opportunities
offered,
potential
directions
speculated.
Energy & Environmental Science,
Год журнала:
2018,
Номер
11(4), С. 744 - 771
Опубликована: Янв. 1, 2018
To
avoid
unnoticed
errors
made
by
researchers
who
are
working
in
the
area
of
nanostructured
materials
for
water
splitting,
correct
and
precise
use
evaluation
parameters
is
discussed
detail,
stating
their
acceptability
validity.
Chemical Society Reviews,
Год журнала:
2022,
Номер
51(11), С. 4583 - 4762
Опубликована: Янв. 1, 2022
Replacing
fossil
fuels
with
energy
sources
and
carriers
that
are
sustainable,
environmentally
benign,
affordable
is
amongst
the
most
pressing
challenges
for
future
socio-economic
development.
ACS Energy Letters,
Год журнала:
2019,
Номер
4(4), С. 933 - 942
Опубликована: Март 19, 2019
Hot,
coastal,
hyper-arid
regions
with
intense
solar
irradiation
and
strong
on-
off-shore
wind
patterns
are
ideal
locations
for
the
production
of
renewable
electricity
using
turbines
or
photovoltaics.
Given
ample
access
to
seawater
scarce
freshwater
resources,
such
make
direct
selective
electrolytic
splitting
into
molecular
hydrogen
oxygen
a
potentially
attractive
technology.
The
key
catalytic
challenge
consists
competition
between
anodic
chlorine
chemistry
evolution
reaction
(OER).
This
Perspective
addresses
some
aspects
related
electrolyzers
equipped
OER
(HER)
electrocatalysts.
Starting
from
historical
background
most
recent
achievements,
it
will
provide
insights
current
state
future
perspectives
topic.
also
prospects
combination
electrolysis
fuel
cell
technology
(reversible
electrolysis)
discusses
its
suitability
as
combined
energy
conversion–freshwater
Nature Communications,
Год журнала:
2018,
Номер
9(1)
Опубликована: Июль 17, 2018
It
is
of
great
importance
to
understand
the
origin
high
oxygen-evolving
activity
state-of-the-art
multimetal
oxides/(oxy)hydroxides
at
atomic
level.
Herein
we
report
an
evident
improvement
oxygen
evolution
reaction
via
incorporating
iron
and
vanadium
into
nickel
hydroxide
lattices.
X-ray
photoelectron/absorption
spectroscopies
reveal
synergistic
interaction
between
iron/vanadium
dopants
in
host
matrix,
which
subtly
modulates
local
coordination
environments
electronic
structures
iron/vanadium/nickel
cations.
Further,
in-situ
absorption
spectroscopic
analyses
manifest
contraction
metal-oxygen
bond
lengths
activated
catalyst,
with
a
short
vanadium-oxygen
distance.
Density
functional
theory
calculations
indicate
that
site
co-doped
(oxy)hydroxide
gives
near-optimal
binding
energies
intermediates
has
lower
overpotential
compared
sites.
These
findings
suggest
doped
distorted
geometric
disturbed
makes
crucial
contribution
trimetallic
catalyst.
Nature Communications,
Год журнала:
2020,
Номер
11(1)
Опубликована: Май 20, 2020
Abstract
NiFe
and
CoFe
(MFe)
layered
double
hydroxides
(LDHs)
are
among
the
most
active
electrocatalysts
for
alkaline
oxygen
evolution
reaction
(OER).
Herein,
we
combine
electrochemical
measurements,
operando
X-ray
scattering
absorption
spectroscopy,
density
functional
theory
(DFT)
calculations
to
elucidate
catalytically
phase,
center
OER
mechanism.
We
provide
first
direct
atomic-scale
evidence
that,
under
applied
anodic
potentials,
MFe
LDHs
oxidize
from
as-prepared
α-phases
activated
γ-phases.
The
OER-active
γ-phases
characterized
by
about
8%
contraction
of
lattice
spacing
switching
intercalated
ions.
DFT
reveal
that
proceeds
via
a
Mars
van
Krevelen
flexible
electronic
structure
surface
Fe
sites,
their
synergy
with
nearest-neighbor
M
sites
through
formation
O-bridged
Fe-M
centers,
stabilize
intermediates
unfavorable
on
pure
M-M
centers
single
fundamentally
accounting
high
catalytic
activity
LDHs.
