Chemistry of Materials,
Journal Year:
2017,
Volume and Issue:
29(13), P. 5566 - 5573
Published: June 15, 2017
Herein,
we
present
a
facile
metal–organic
framework-engaged
strategy
to
synthesize
hollow
Co3S4@MoS2
heterostructures
as
efficient
bifunctional
catalysts
for
both
H2
and
O2
generation.
The
well-known
cobalt-based
zeolitic
imidazolate
frameworks
(ZIF-67)
are
used
not
only
the
morphological
template
but
also
cobalt
precursor.
During
two-step
temperature-raising
hydrothermal
process,
ZIF-67
polyhedrons
first
transformed
sulfide
by
sulfidation,
then
molybdenum
disulfide
nanosheets
further
grow
deposit
on
surface
of
at
increased
temperature.
crystalline
finally
obtained
after
subsequent
thermal
annealing
under
N2
atmosphere.
Due
synergistic
effects
between
hydrogen
evolution
reaction
active
catalyst
MoS2
oxygen
Co3S4,
exhibit
outstanding
catalytic
performances
toward
reactions
in
acidic
alkaline
media.
International Journal of Hydrogen Energy,
Journal Year:
2017,
Volume and Issue:
42(52), P. 30470 - 30492
Published: Nov. 23, 2017
The
need
for
energy
storage
to
balance
intermittent
and
inflexible
electricity
supply
with
demand
is
driving
interest
in
conversion
of
renewable
via
electrolysis
into
a
storable
gas.
But,
high
capital
cost
uncertainty
regarding
future
performance
improvements
are
barriers
investment
water
electrolysis.
Expert
elicitations
can
support
decision-making
when
data
sparse
their
development
uncertain.
Therefore,
this
study
presents
expert
views
on
cost,
lifetime
efficiency
three
technologies:
alkaline
(AEC),
proton
exchange
membrane
(PEMEC)
solid
oxide
cell
(SOEC).
Experts
estimate
that
increased
R&D
funding
reduce
costs
by
0–24%,
while
production
scale-up
alone
has
an
impact
17–30%.
System
lifetimes
may
converge
at
around
60,000–90,000
h
will
be
negligible.
In
addition
innovations
the
cell-level,
experts
highlight
improved
methods
automate
manufacturing
produce
higher
quality
components.
Research
SOECs
lower
electrode
polarisation
resistance
or
zero-gap
AECs
could
undermine
projected
dominance
PEMEC
systems.
This
thereby
reduces
shows
how
help
guide
near-term
investment,
policy
research
efforts
low-carbon
Journal of the American Chemical Society,
Journal Year:
2018,
Volume and Issue:
140(25), P. 7748 - 7759
Published: May 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,
Journal Year:
2019,
Volume and Issue:
31(31)
Published: Jan. 18, 2019
Electrochemical
energy
storage
by
making
H2
an
carrier
from
water
splitting
relies
on
four
elementary
reactions,
i.e.,
the
hydrogen
evolution
reaction
(HER),
oxidation
(HOR),
oxygen
(OER),
and
reduction
(ORR).
Herein,
central
objective
is
to
recommend
systematic
protocols
for
activity
measurements
of
these
reactions
benchmark
activities
comparison,
which
critical
facilitate
research
development
catalysts
with
high
stability.
Details
electrochemical
cell
setup,
measurements,
data
analysis
used
quantify
kinetics
HER,
HOR,
OER,
ORR
in
acidic
basic
solutions
are
provided,
examples
state-of-the-art
specific
mass
date
given.
First,
experimental
setup
discussed
provide
common
guidelines
including
design,
reference
electrode
selection,
counter
concerns,
working
preparation.
Second,
protocols,
collection
processing
such
as
ohmic-
background-correction
catalyst
surface
area
estimation,
practice
testing
comparing
different
classes
recommended.
Lastly,
some
benchmarked
comparison
across
laboratories.
Advanced Energy Materials,
Journal Year:
2016,
Volume and Issue:
7(1)
Published: Oct. 26, 2016
The
low
efficiency
of
the
electrocatalytic
oxidation
water
to
O
2
(oxygen
evolution
reaction‐OER)
is
considered
as
one
major
roadblocks
for
storage
electricity
from
renewable
sources
in
form
molecular
fuels
like
H
or
hydrocarbons.
Especially
acidic
environments,
compatible
with
powerful
proton
exchange
membrane
(PEM),
an
earth‐abundant
OER
catalyst
that
combines
high
activity
and
stability
still
unknown.
Current
PEM‐compatible
catalysts
rely
mostly
on
Ir
and/or
Ru
active
components,
which
are
both
very
scarce
elements
platinum
group.
Hence,
amount
has
be
strictly
minimized.
Unfortunately,
mechanism,
most
tool
optimization,
remains
unclear.
In
this
review,
we
first
summarize
current
state
our
understanding
mechanism
heterogeneous
electrocatalysts,
before
compare
contrast
homogenous
catalysts.
Thereafter,
overview
over
monometallic
provided
obtain
insights
into
structure‐function
relations
followed
by
a
review
material
optimization
concepts
support
materials.
Moreover,
missing
links
required
complete
mechanistic
picture
well
promising
pointed
out.
Chemical Society Reviews,
Journal Year:
2022,
Volume and Issue:
51(11), P. 4583 - 4762
Published: Jan. 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.
Journal of Materials Chemistry A,
Journal Year:
2016,
Volume and Issue:
4(31), P. 11973 - 12000
Published: Jan. 1, 2016
The
fundamentals
of
water
electrolysis,
current
popular
electrocatalysts
developed
for
cathodic
hydrogen
evolution
reaction
(HER)
and
anodic
oxygen
(OER)
in
liquid
electrolyte
electrolysis
are
reviewed
discussed.
