Advanced Energy Materials,
Journal Year:
2022,
Volume and Issue:
12(8)
Published: Jan. 9, 2022
Abstract
Tuning
active
sites
in
catalyst
design
is
the
key
to
boosting
intrinsic
activity
of
hydrogen
evolution
reaction
(HER).
Cationic
Ni
has
been
widely
established
as
an
site
nickel
sulfide
due
relatively
low
Gibbs
free
energy
adsorption
(
Δ
G
H*
).
However,
one
big
unsettled
issues
whether
S
can
be
activated
a
more
than
NiS
2
.
Herein,
swapping
catalytic
from
cationic
anionic
hierarchical
structure
consisting
nanoflowers
grown
on
dual‐phased
‐NiS
foam
(denoted
/NiS
‐NiS)
shown.
A
combined
study
theoretical
calculations
and
X‐ray
photoelectron
spectroscopy
analysis
demonstrate
remarkably
antidromic
electron
transfer
sites,
therefore
relieving
species
endowing
higher
at
over
site.
The
new
exhibits
superior
HER
performance,
identified
by
doubling
twofold
increased
turnover
frequency
value
compared
its
pure
counterpart
(0.028
s
−1
vs
0.015
applied
overpotential
200
mV).
electrode
also
demonstrates
outstanding
toward
oxygen
overall
water
splitting.
Advanced Functional Materials,
Journal Year:
2020,
Volume and Issue:
30(15)
Published: Feb. 16, 2020
The
development
of
low-cost,
high-efficiency,
and
robust
electrocatalysts
for
the
oxygen
evolution
reaction
(OER)
is
urgently
needed
to
address
energy
crisis.
In
recent
years,
non-noble-metal-based
OER
have
attracted
tremendous
research
attention.
Beginning
with
introduction
some
evaluation
criteria
OER,
current
are
reviewed,
classification
metals/alloys,
oxides,
hydroxides,
chalcogenides,
phosphides,
phosphates/borates,
other
compounds,
along
their
advantages
shortcomings.
knowledge
mechanisms
practical
applications
also
summarized
developing
more
efficient
electrocatalysts.
Finally,
states,
challenges,
perspectives
discussed.
Energy & Environmental Science,
Journal Year:
2020,
Volume and Issue:
13(10), P. 3439 - 3446
Published: Jan. 1, 2020
A
robust
oxygen-evolving
electrocatalyst
for
high-performance
seawater
splitting
was
developed
using
a
cost-effective
and
industrially
compatible
method.
Chemical Society Reviews,
Journal Year:
2021,
Volume and Issue:
50(4), P. 2663 - 2695
Published: Jan. 1, 2021
This
review
summarizes
the
recent
progress
on
MOFs
and
their
derivatives
used
for
OER
electrocatalysis
in
terms
of
morphology,
composition
structure–performance
relationship.
Small,
Journal Year:
2020,
Volume and Issue:
16(38)
Published: Aug. 20, 2020
Abstract
Developing
efficient
and
stable
non‐noble
electrocatalysts
for
the
oxygen
evolution
reaction
(OER)
remains
challenging
practical
applications.
While
nickel–iron
layered
double
hydroxides
(NiFe‐LDH)
are
emerging
as
prominent
candidates
with
promising
OER
activity,
their
catalytic
performance
is
still
restricted
by
limited
active
sites,
poor
conductivity
durability.
Herein,
hierarchical
nickel–iron–cobalt
LDH
nanosheets/carbon
fibers
(NiFeCo‐LDH/CF)
synthesized
through
solvent‐thermal
treatment
of
ZIF‐67/CF.
Extended
X‐ray
adsorption
fine
structure
analyses
reveal
that
Co
substitution
can
stabilize
Fe
local
coordination
environment
facilitate
π‐symmetry
bonding
orbital
in
NiFeCo‐LDH/CF,
thus
modifying
electronic
structures.
Coupling
structural
advantages,
including
largely
exposed
surface
sites
facilitated
charge
transfer
pathway
ensured
CF,
resultant
NiFeCo‐LDH/CF
exhibits
excellent
activity
an
overpotential
249
mV
at
10
mA
cm
−1
well
robust
stability
over
20
h.
Advanced Functional Materials,
Journal Year:
2021,
Volume and Issue:
31(16)
Published: Feb. 17, 2021
Abstract
Electrochemical
water
splitting
is
a
critical
energy
conversion
process
for
producing
clean
and
sustainable
hydrogen;
this
relies
on
low‐cost,
highly
active,
durable
oxygen
evolution
reaction/hydrogen
reaction
electrocatalysts.
Metal
cations
(including
transition
metal
noble
cations),
particularly
high‐valence
that
show
high
catalytic
activity
can
serve
as
the
main
active
sites
in
electrochemical
processes,
have
received
special
attention
developing
advanced
In
review,
heterogenous
electrocatalyst
design
strategies
based
are
presented,
associated
materials
designed
summarized.
discussion,
emphasis
given
to
combined
with
modulation
of
phase/electronic/defect
structure
performance
improvement.
Specifically,
importance
using
situ
operando
techniques
track
real
metal‐based
during
highlighted.
Remaining
challenges
future
research
directions
also
proposed.
It
expected
comprehensive
discussion
electrocatalysts
containing
be
instructive
further
explore
other
energy‐related
reactions.
Angewandte Chemie International Edition,
Journal Year:
2021,
Volume and Issue:
60(42), P. 22908 - 22914
Published: Aug. 18, 2021
Abstract
Nickel
hydroxide
(Ni(OH)
2
)
is
a
promising
electrocatalyst
for
the
5‐hydroxymethylfurfural
oxidation
reaction
(HMFOR)
and
dehydronated
intermediates
Ni(OH)O
species
are
proved
to
be
active
sites
HMFOR.
In
this
study,
Ni(OH)
modified
by
platinum
adjust
electronic
structure
current
density
of
HMFOR
improves
8.2
times
at
Pt/Ni(OH)
electrode
compared
with
that
on
electrode.
Operando
methods
reveal
introduction
Pt
optimized
redox
property
accelerate
formation
during
catalytic
process.
Theoretical
studies
demonstrate
enhanced
kinetics
originates
from
reduced
dehydrogenation
energy
.
The
product
analysis
transition
state
simulation
prove
also
reduces
adsorption
HMF
behavior
as
can
act
site
HMF.
Overall,
work
here
provides
strategy
design
an
efficient
universal
nickel‐based
catalyst
electro‐oxidation,
which
extended
other
Ni‐based
catalysts
such
Ni(HCO
3
NiO.
Angewandte Chemie International Edition,
Journal Year:
2020,
Volume and Issue:
59(29), P. 11948 - 11957
Published: April 27, 2020
Transition-metal
oxides
as
electrocatalysts
for
the
oxygen
evolution
reaction
(OER)
provide
a
promising
route
to
face
energy
and
environmental
crisis
issues.
Although
palmeirite
oxide
A2
Mo3
O8
OER
catalyst
has
been
explored,
correlation
between
its
active
sites
(tetrahedral
or
octahedral)
performance
elusive.
Now,
magnetic
Co2
@NC-800
composed
of
highly
crystallized
nanosheets
ultrathin
N-rich
carbon
layer
is
shown
be
an
efficient
catalyst.
The
exhibits
favorable
with
overpotential
331
mV@10
mA
cm-2
422
mV@40
,
full
water-splitting
electrolyzer
it
anode
shows
cell
voltage
1.67
V@10
in
alkaline.
Combined
HAADFSTEM,
magnetic,
computational
results
show
that
factors
influencing
can
attributed
tetrahedral
Co
(high
spin,
t23
e4
),
which
improve
kinetics
rate-determining
step
form
*OOH.
Advanced Functional Materials,
Journal Year:
2020,
Volume and Issue:
31(9)
Published: Dec. 6, 2020
Abstract
The
reaction
kinetics
of
alkaline
hydrogen
evolution
reactions
(HER)
is
a
trade‐off
between
adsorption
and
desorption
for
intermediate
species
(H
2
O,
OH,
H
ads
).
However,
due
to
the
complicated
correlation
intermediates
energy
electronic
states,
targeted
regulating
at
atomic
level
not
comprehensive.
Herein,
nonmetals
(B,
N,
F)
are
used
modulate
structure
Ni
3
S
4
,
propose
that
O
OH
correlate
directly
with
d‐band
center
(ε
d
)
transition
metal
Ni,
has
linear
dependence
on
p‐band
p
nonmetal
S.
Direct
experimental
evidence
offered
in
all
doping
samples,
Tafel
slope
exchange
current
density
can
be
improved
regularly
ε
F‐Ni
shows
optimum
activity
tiny
overpotential
29
92
mV
harvesting
10
100
mA
cm
−2
respectively.
Furthermore,
micro‐kinetics
analysis
functional
theory
calculations
verify
F‐doping
efficiently
reduce
barrier
Volmer
step,
eventually
accelerating
HER
kinetics.
This
work
provides
atomic‐level
insight
into
structure‐properties
relationship,
opens
an
avenue
kinetic‐oriented
design
beyond.
