Angewandte Chemie International Edition,
Год журнала:
2018,
Номер
57(29), С. 8921 - 8926
Опубликована: Май 1, 2018
Pyrolysis
of
a
bimetallic
metal-organic
framework
(MIL-88-Fe/Ni)-dicyandiamide
composite
yield
Fe
and
Ni
containing
carbonaceous
material,
which
is
an
efficient
bifunctional
electrocatalyst
for
overall
water
splitting.
FeNi3
NiFe2
O4
are
found
as
metallic
metal
oxide
compounds
closely
embedded
in
N-doped
carbon-carbon
nanotube
matrix.
This
hybrid
catalyst
(Fe-Ni@NC-CNTs)
significantly
promotes
the
charge
transfer
efficiency
restrains
corrosion
catalysts,
shown
high
OER
HER
activity
with
overpotential
274
202
mV,
respectively
at
10
mA
cm-2
alkaline
solution.
When
this
was
further
used
H2
O2
production
electrochemical
water-splitting
unit,
it
can
operate
ambient
conditions
competitive
gas
rate
1.15
0.57
μL
s-1
hydrogen
oxygen,
respectively,
showing
its
potential
practical
applications.
Advanced Energy Materials,
Год журнала:
2017,
Номер
7(17)
Опубликована: Май 10, 2017
The
overriding
obstacle
to
mass
production
of
hydrogen
from
water
as
the
premium
fuel
for
powering
our
planet
is
frustratingly
slow
kinetics
oxygen
evolution
reaction
(OER).
Additionally,
inadequate
understanding
key
barriers
OER
a
hindrance
insightful
design
advanced
catalysts.
This
study
presents
ultrathin
amorphous
high‐surface
area
nickel
boride
(Ni
x
B)
nanosheets
low‐cost,
very
efficient
and
stable
catalyst
electrochemical
splitting.
affords
10
mA
cm
−2
at
0.38
V
overpotential
during
in
1.0
m
KOH,
reducing
only
0.28
20
when
supported
on
foam,
which
ranks
it
among
best
reported
nonprecious
catalysts
evolution.
Operando
X‐ray
absorption
fine‐structure
spectroscopy
measurements
reveal
prevalence
NiOOH,
well
Ni‐B
under
conditions,
owing
core@nickel
oxyhydroxide
shell
(Ni‐B@NiO
H)
structure,
increase
disorder
NiO
H
layer,
thus
revealing
important
insight
into
transient
states
Advanced Materials,
Год журнала:
2022,
Номер
34(21)
Опубликована: Апрель 5, 2022
The
development
of
bifunctional
water-splitting
electrocatalysts
that
are
efficient
and
stable
over
a
wide
range
pH
is
great
significance
but
challenging.
Here,
an
atomically
dispersed
Ru/Co
dual-sites
catalyst
reported
anchored
on
N-doped
carbon
(Ru/Co-N-C)
for
outstanding
oxygen
evolution
reaction
(OER)
hydrogen
(HER)
in
both
acidic
alkaline
electrolytes.
Ru/Co-N-C
requires
the
overpotential
only
13
23
mV
HER,
232
247
OER
to
deliver
current
density
10
mA
cmgeo-2
0.5
m
H2
SO4
1
KOH,
respectively,
outperforming
benchmark
catalysts
Pt/C
RuO2
.
Theoretical
calculations
reveal
introduction
Co-N4
sites
into
efficiently
modify
electronic
structure
Ru
by
enlarging
Ru-O
covalency
increasing
electron
density,
which
turn
optimize
bonding
strength
between
oxygen/hydrogen
intermediate
species
with
sites,
thereby
enhancing
HER
performance.
Furthermore,
incorporation
induces
redistribution
around
Ru-N4,
thus
corrosion-resistance
during
acid
electrolysis.
has
been
applied
proton
exchange
membrane
water
electrolyzer
steady
operation
demonstrated
at
high
450
330
h.
Advanced Materials,
Год журнала:
2019,
Номер
31(48)
Опубликована: Сен. 8, 2019
Abstract
Under
the
double
pressures
of
both
energy
crisis
and
environmental
pollution,
exploitation
utilization
hydrogen,
a
clean
renewable
power
resource,
has
become
an
important
trend
in
development
sustainable
energy‐production
energy‐consumption
systems.
In
this
regard,
electrocatalytic
hydrogen
evolution
reaction
(HER)
provides
efficient
pathway
for
mass
production
fuel
motivated
design
construction
highly
active
HER
electrocatalysts
acceptable
cost.
particular,
graphene‐based
commonly
exhibit
enhanced
performance
owing
to
their
distinctive
structural
merits,
including
large
surface
area,
high
electrical
conductivity,
good
chemical
stability.
Considering
rapidly
growing
research
enthusiasm
topic
over
last
several
years,
herein,
panoramic
review
recent
advances
is
presented,
covering
various
advanced
synthetic
strategies,
microstructural
characterizations,
applications
such
materials
electrocatalysis.
Lastly,
future
perspectives
on
challenges
opportunities
awaiting
emerging
field
are
proposed
discussed.
Angewandte Chemie International Edition,
Год журнала:
2018,
Номер
57(29), С. 8921 - 8926
Опубликована: Май 1, 2018
Pyrolysis
of
a
bimetallic
metal-organic
framework
(MIL-88-Fe/Ni)-dicyandiamide
composite
yield
Fe
and
Ni
containing
carbonaceous
material,
which
is
an
efficient
bifunctional
electrocatalyst
for
overall
water
splitting.
FeNi3
NiFe2
O4
are
found
as
metallic
metal
oxide
compounds
closely
embedded
in
N-doped
carbon-carbon
nanotube
matrix.
This
hybrid
catalyst
(Fe-Ni@NC-CNTs)
significantly
promotes
the
charge
transfer
efficiency
restrains
corrosion
catalysts,
shown
high
OER
HER
activity
with
overpotential
274
202
mV,
respectively
at
10
mA
cm-2
alkaline
solution.
When
this
was
further
used
H2
O2
production
electrochemical
water-splitting
unit,
it
can
operate
ambient
conditions
competitive
gas
rate
1.15
0.57
μL
s-1
hydrogen
oxygen,
respectively,
showing
its
potential
practical
applications.
