Angewandte Chemie International Edition,
Год журнала:
2023,
Номер
62(40)
Опубликована: Авг. 15, 2023
Abstract
Heteroatom
doping
has
emerged
as
a
highly
effective
strategy
to
enhance
the
activity
of
metal‐based
electrocatalysts
toward
oxygen
evolution
reaction
(OER).
It
is
widely
accepted
that
does
not
switch
OER
mechanism
from
adsorbate
(AEM)
lattice‐oxygen‐mediated
(LOM),
and
enhanced
attributed
optimized
binding
energies
intermediates.
However,
this
seems
inconsistent
with
fact
overpotential
doped
(<300
mV)
considerably
smaller
than
limit
AEM
(>370
mV).
To
determine
origin
inconsistency,
we
select
phosphorus
(P)‐doped
nickel‐iron
mixed
oxides
model
observe
enhances
covalency
metal‐oxygen
bonds
drive
pathway
transition
LOM,
thereby
breaking
adsorption
linear
relation
between
*OH
*OOH
in
AEM.
Consequently,
obtained
P‐doped
display
small
237
mV
at
10
mA
cm
−2
.
Beyond
P,
similar
also
observed
on
sulfur
doping.
These
findings
offer
new
insights
into
substantially
originating
heteroatom
ACS Catalysis,
Год журнала:
2021,
Номер
11(20), С. 12485 - 12509
Опубликована: Сен. 27, 2021
Electrocatalytic
water
splitting
is
a
sustainable
way
to
produce
hydrogen
energy,
but
the
oxygen
evolution
reaction
(OER)
at
anode
has
sluggish
kinetics
and
low
energy
conversion
efficiency,
which
major
bottleneck
for
large-scale
production.
The
design
synthesis
of
robust
low-cost
OER
catalysts
are
crucial
OER.
NiCo-based
electrocatalysts
have
suitable
atomic
electronic
structures,
show
high
activity
stability
during
process.
Recently,
significant
progress
been
made
in
regulating
structure
composition
understanding
nature
catalysis,
especially
mechanism,
catalytic
active
sites,
structure–activity
relationship.
In
this
work,
we
summarized
discussed
latest
development
OER,
with
particular
emphasis
on
catalyst
synthesis,
strategies
boosting
performance,
catalysis
from
experimental
theoretical
perspectives.
some
descriptors,
relationships
based
unveiled.
Finally,
challenges
futuristic
outlooks
improving
performance
proposed,
hope
review
can
provide
guidance
more
efficient
electrocatalysts.
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.
Advanced Functional Materials,
Год журнала:
2022,
Номер
32(23)
Опубликована: Март 3, 2022
Abstract
Nonprecious
transition
metal‐organic
frameworks
(MOFs)
are
one
of
the
most
promising
precursors
for
developing
electrocatalysts
with
high
porosity
and
structural
rigidity.
This
study
reports
synthesis
efficiency
based
on
S‐doped
NiFeP.
MOF‐derived
NiFeP
structure
is
synthesized
by
a
one‐step
phosphorization
process
using
MOFs
as
precursor,
which
more
convenient
environment
friendly,
also
helps
retain
samples’
framework.
The
oxygen
evolution
reaction
(OER)
hydrogen
(HER)
performance
catalysts
can
be
improved
after
partially
replacing
P
S
due
to
tunable
electronic
structure.
optimized
CCS‐NiFeP‐10
reaches
current
density
10
mA
cm
–2
OER
an
overpotential
201
mV
outperforms
NiFe‐based
catalysts.
doping
plays
important
role
in
tuning
Δ
G
values
intermediates
formation
Ni
atoms
suitable
value
exhibits
pronouncedly
performance.
CCS‐NiFeP‐20
sample
presents
excellent
HER
d‐band
center
downshifting
from
Fermi
level.
When
voltage
electrolytic
cell
1.50
V,
obtained.
strategy
paves
way
designing
highly
active
none‐noble
metal
Abstract
Electron
density
modulation
is
of
great
importance
in
an
attempt
to
achieve
highly
active
electrocatalysts
for
the
oxygen
evolution
reaction
(OER).
Here,
successful
construction
CuO@CoOOH
p‐n
heterojunction
(i.e.,
p‐type
CuO
and
n‐type
CoOOH)
nanoarray
electrocatalyst
through
situ
anodic
oxidation
CuO@CoS
x
on
copper
foam
reported.
The
can
remarkably
modify
electronic
properties
space‐charge
region
facilitate
electron
transfer.
Moreover,
Raman
study
reveals
generation
SO
4
2−
from
CoS
oxidation,
cloud
distribution
functional
theory
calculation
suggest
that
surface‐adsorbed
OER
process
by
enhancing
adsorption
OH
−
.
positively
charged
CoOOH
significantly
enhance
activity.
As
a
result,
shows
enhanced
performance
with
low
overpotential
186
mV
afford
current
10
mA
cm
−2
preparation
large
scale
(14
×
25
2
)
sample
demonstrates
possibility
promoting
catalyst
industrial‐scale
production.
This
offers
new
insights
into
design
fabrication
non‐noble
metal‐based
as
effective
catalytic
materials
energy
storage
conversion.
Energy & Environmental Science,
Год журнала:
2022,
Номер
15(10), С. 4048 - 4057
Опубликована: Янв. 1, 2022
The
single-atomic-site
doping
of
oxophilic-metal
(Ru)
species
in
FeCo-LDH
leads
to
the
active
atom
reconstruction
at
symmetry-breaking
interfaces
and
then
excellent
catalytic
performance
for
OER/HER
overall
water
splitting
large
current
densities.
