Nature Communications,
Год журнала:
2022,
Номер
13(1)
Опубликована: Фев. 1, 2022
Computational
calculations
and
experimental
studies
reveal
that
the
CoOOH
phase
intermediate-spin
(IS)
state
are
key
factors
for
realizing
efficient
Co-based
electrocatalysts
oxygen
evolution
reaction
(OER).
However,
according
to
thermodynamics,
general
cobalt
oxide
converts
CoO2
under
OER
condition,
retarding
kinetics.
Herein,
we
demonstrate
a
simple
scalable
strategy
fabricate
electrodes
with
maintaining
Fe-CoOOH
an
IS
OER.
The
changes
of
spin
states
were
uncovered
by
combining
in-situ/operando
X-ray
based
absorption
spectroscopy
Raman
spectroscopy.
Electrochemical
reconstruction
chalcogenide
treated
Co
foam
affords
highly
enlarged
active
surface
conferred
excellent
catalytic
activity
stability
in
large-scale
water
electrolyzer.
Our
findings
meaningful
calculated
results
experimentally
verified
through
operando
analyses.
It
also
proposes
new
electrode
fabrication
confirms
importance
real
phases
particular
condition.
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.
As
a
promising
substitute
for
fossil
fuels,
hydrogen
has
emerged
as
clean
and
renewable
energy.
A
key
challenge
is
the
efficient
production
of
to
meet
commercial-scale
demand
hydrogen.
Water
splitting
electrolysis
pathway
achieve
in
terms
energy
conversion
storage
which
catalysis
or
electrocatalysis
plays
critical
role.
The
development
active,
stable,
low-cost
catalysts
electrocatalysts
an
essential
prerequisite
achieving
desired
electrocatalytic
from
water
practical
use,
constitutes
central
focus
this
review.
It
will
start
with
introduction
performance
evaluation
various
activity,
stability,
efficiency.
This
be
followed
by
outlining
current
knowledge
on
two
half-cell
reactions,
evolution
reaction
(HER)
oxygen
(OER),
mechanisms
alkaline
acidic
media.
Recent
advances
design
preparation
nanostructured
noble-metal
non-noble
metal-based
discussed.
New
strategies
insights
exploring
synergistic
structure,
morphology,
composition,
active
sites
increasing
activity
stability
HER
OER
highlighted.
Finally,
future
challenges
perspectives
robust
towards
also
outlined.
Chemical Society Reviews,
Год журнала:
2021,
Номер
50(15), С. 8428 - 8469
Опубликована: Янв. 1, 2021
The
recent
progress
in
activating
surface
reconstruction
by
integrating
advanced
characterizations
with
theoretical
calculations
for
high-efficiency
oxygen
evolution
reaction
is
reviewed.
Abstract
Oxygen
evolution
reaction
(OER)
is
an
important
half‐reaction
involved
in
many
electrochemical
applications,
such
as
water
splitting
and
rechargeable
metal–air
batteries.
However,
the
sluggish
kinetics
of
its
four‐electron
transfer
process
becomes
a
bottleneck
to
performance
enhancement.
Thus,
rational
design
electrocatalysts
for
OER
based
on
thorough
understanding
mechanisms
structure‐activity
relationship
vital
significance.
This
review
begins
with
introduction
which
include
conventional
adsorbate
mechanism
lattice‐oxygen‐mediated
mechanism.
The
pathways
related
intermediates
are
discussed
detail,
several
descriptors
greatly
assist
catalyst
screen
optimization
summarized.
Some
parameters
suggested
measurement
criteria
also
mentioned
discussed.
Then,
recent
developments
breakthroughs
experimental
achievements
transition
metal‐based
reviewed
reveal
novel
principles.
Finally,
some
perspectives
future
directions
proposed
further
catalytic
enhancement
deeper
design.
It
believed
that
iterative
improvements
fundamental
principles
essential
realize
applications
efficient
energy
storage
conversion
technologies.
Advanced Materials,
Год журнала:
2021,
Номер
33(20)
Опубликована: Март 25, 2021
Abstract
The
proton
exchange
membrane
(PEM)
water
electrolysis
is
one
of
the
most
promising
hydrogen
production
techniques.
oxygen
evolution
reaction
(OER)
occurring
at
anode
dominates
overall
efficiency.
Developing
active
and
robust
electrocatalysts
for
OER
in
acid
a
longstanding
challenge
PEM
electrolyzers.
Most
catalysts
show
unsatisfied
stability
under
strong
acidic
oxidative
conditions.
Such
also
leads
to
difficulties
better
understanding
mechanisms.
This
review
aims
provide
current
progress
on
mechanisms
acid,
analyze
strategies
enhance
both
activity
stability,
summarize
state‐of‐the‐art
acid.
First,
prevailing
are
reviewed
establish
physicochemical
structure–activity
relationships
guiding
design
highly
efficient
with
stable
performance.
reported
approaches
improve
activity,
from
macroview
microview,
then
discussed.
To
problem
instability,
key
factors
affecting
catalyst
summarized
surface
reconstruction
Various
noble‐metal‐based
non‐noble‐metal‐based
reviewed.
Finally,
challenges
perspectives
development
Angewandte Chemie International Edition,
Год журнала:
2021,
Номер
60(36), С. 19572 - 19590
Опубликована: Фев. 19, 2021
Abstract
Compared
to
modern
fossil‐fuel‐based
refineries,
the
emerging
electrocatalytic
refinery
(e‐refinery)
is
a
more
sustainable
and
environmentally
benign
strategy
convert
renewable
feedstocks
energy
sources
into
transportable
fuels
value‐added
chemicals.
A
crucial
step
in
conducting
e‐refinery
processes
development
of
appropriate
reactions
optimal
electrocatalysts
for
efficient
cleavage
formation
chemical
bonds.
However,
compared
well‐studied
primary
(e.g.,
O
2
reduction,
water
splitting),
mechanistic
aspects
materials
design
complex
are
yet
be
settled.
To
address
this
challenge,
herein,
we
first
present
fundamentals
heterogeneous
electrocatalysis
some
reactions,
then
implement
these
establish
framework
by
coupling
situ
generated
intermediates
(integrated
reactions)
or
products
(tandem
reactions).
We
also
set
principles
strategies
efficiently
manipulate
reaction
pathways.
