Advanced Functional Materials,
Journal Year:
2020,
Volume and Issue:
30(19)
Published: Feb. 25, 2020
Abstract
The
development
of
novel
non‐noble
electrocatalysts
with
controlled
structure
and
surface
composition
is
critical
for
efficient
electrochemical
hydrogen
evolution
reaction
(HER).
Herein,
the
rational
design
porous
molybdenum
carbide
(β‐Mo
2
C)
spheres
different
engineered
structures
(Co
doping,
Mo
vacancies
generation,
coexistence
Co
doping
vacancies)
performed
to
enhance
HER
performance
over
β‐Mo
C‐based
catalyst
surface.
Density
functional
theory
calculations
experimental
results
reveal
that
synergistic
effect
increases
electron
density
around
Fermi‐level
modulates
d
band
center
C
so
strength
MoH
bond
reasonably
optimized,
thus
leading
an
enhanced
kinetics.
As
expected,
optimized
50
‐Mo
C‐12
displays
a
low
overpotential
(η
10
=
125
mV),
low‐onset
onset
27
high
exchange
current
(
j
0
0.178
mA
cm
−2
).
Furthermore,
this
strategy
also
successfully
extended
develop
other
effective
metal
(e.g.,
Fe
Ni)
doped
electrocatalyst,
indicating
it
universal
highly
carbide‐based
catalysts
beyond.
Advanced Materials,
Journal Year:
2021,
Volume and Issue:
33(20)
Published: March 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
Advanced Materials,
Journal Year:
2021,
Volume and Issue:
33(17)
Published: March 22, 2021
Abstract
Electrochemical
water
splitting
has
attracted
significant
attention
as
a
key
pathway
for
the
development
of
renewable
energy
systems.
Fabricating
efficient
electrocatalysts
these
processes
is
intensely
desired
to
reduce
their
overpotentials
and
facilitate
practical
applications.
Recently,
metal–organic
framework
(MOF)
nanoarchitectures
featuring
ultrahigh
surface
areas,
tunable
nanostructures,
excellent
porosities
have
emerged
promising
materials
highly
active
catalysts
electrochemical
splitting.
Herein,
most
pivotal
advances
in
recent
research
on
engineering
MOF
are
presented.
First,
design
catalytic
centers
MOF‐based/derived
summarized
compared
from
aspects
chemical
composition
optimization
structural
functionalization
at
atomic
molecular
levels.
Subsequently,
fast‐growing
breakthroughs
activities,
identification
sites,
fundamental
mechanisms
thoroughly
discussed.
Finally,
comprehensive
commentary
current
primary
challenges
future
perspectives
its
commercialization
hydrogen
production
provided.
Hereby,
new
insights
into
synthetic
principles
electrocatalysis
designing
utilization
offered,
thus
further
promoting
prosperity
wide
range
Energy & Environmental Science,
Journal Year:
2022,
Volume and Issue:
15(6), P. 2288 - 2328
Published: Jan. 1, 2022
This
review
presents
the
current
status
of
PEM
fuel
cell
&
electrolysis
technologies,
along
with
H
2
infrastructure,
describes
their
similarities
differences
in
structures,
materials,
and
fundamentals,
outlines
challenges/opportunities.
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.
Advanced Materials,
Journal Year:
2021,
Volume and Issue:
33(12)
Published: Feb. 18, 2021
Abstract
The
electrochemical
hydrogen
evolution
reaction
(HER)
is
an
attractive
technology
for
the
mass
production
of
hydrogen.
Ru‐based
materials
are
promising
electrocatalysts
owing
to
similar
bonding
strength
with
but
much
lower
cost
than
Pt
catalysts.
Herein,
ordered
macroporous
superstructure
N‐doped
nanoporous
carbon
anchored
ultrafine
Ru
nanoclusters
as
electrocatalytic
micro/nanoreactors
developed
via
thermal
pyrolysis
single
crystals
ZIF‐8
accommodating
Ru(III)
ions.
Benefiting
from
highly
interconnected
reticular
macro–nanospaces,
this
superstrucure
affords
unparalleled
performance
pH‐universal
HER,
order
magnitude
higher
activity
compared
benchmark
Pt/C.
Notably,
exceptionally
low
overpotential
only
13
mV@10
mA
cm
−2
required
HER
in
alkaline
solution,
a
Tafel
slope
40.41
mV
dec
−1
and
ultrahigh
turnover
frequency
value
1.6
H
2
s
at
25
mV,
greatly
outperforming
Furthermore,
generation
rates
almost
twice
those
Pt/C
during
practical
overall
water
splitting.
A
solar‐to‐hydrogen
system
also
demonstrated
further
promote
application.
This
research
may
open
new
avenue
development
advanced
controlled
morphology
excellent
future
energy
applications.
Energy & environment materials,
Journal Year:
2022,
Volume and Issue:
6(5)
Published: May 28, 2022
Electrochemical
water
splitting
represents
one
of
the
most
promising
technologies
to
produce
green
hydrogen,
which
can
help
realize
goal
achieving
carbon
neutrality.
While
substantial
efforts
on
a
laboratory
scale
have
been
made
for
understanding
fundamental
catalysis
and
developing
high‐performance
electrocatalysts
two
half‐reactions
involved
in
electrocatalysis,
much
less
attention
has
paid
doing
relevant
research
larger
scale.
For
example,
few
such
researches
done
an
industrial
Herein,
we
review
very
recent
endeavors
bridge
gaps
between
applications
electrolysis.
We
begin
by
introducing
fundamentals
electrochemical
then
present
comparisons
testing
protocol,
figure
merit,
catalyst
interest,
manufacturing
cost
industry‐based
water‐electrolysis
research.
Special
is
tracking
surface
reconstruction
process
identifying
real
catalytic
species
under
different
conditions,
highlight
significant
distinctions
corresponding
mechanisms.
Advances
designs
industry‐relevant
electrolysis
are
also
summarized,
reveal
progress
moving
practical
forward
accelerating
synergies
material
science
engineering.
Perspectives
challenges
electrocatalyst
design
strategies
proposed
finally
further
lab‐scale
large‐scale
electrocatalysis
applications.
Energy & Environmental Science,
Journal Year:
2021,
Volume and Issue:
14(4), P. 1722 - 1770
Published: Jan. 1, 2021
A
tuned
electronic
structure
favors
the
electrocatalytic
water
splitting
reactionviaaccelerating
reaction
kinetics,
changing
rate-determining
step,
and
optimizing
adsorption
energy
for
intermediates;
this
is
achievedviaintentionally
incorporating
imperfections
into
crystal
lattices
of
electrocatalysts.
Angewandte Chemie International Edition,
Journal Year:
2020,
Volume and Issue:
59(39), P. 17219 - 17224
Published: June 4, 2020
The
development
of
transition-metal-oxides
(TMOs)-based
bifunctional
catalysts
toward
efficient
overall
water
splitting
through
delicate
control
composition
and
structure
is
a
challenging
task.
Herein,
the
rational
design
controllable
fabrication
unique
heterostructured
inter-doped
ruthenium-cobalt
oxide
[(Ru-Co)Ox
]
hollow
nanosheet
arrays
on
carbon
cloth
reported.
Benefiting
from
desirable
compositional
structural
advantages
more
exposed
active
sites,
optimized
electronic
structure,
interfacial
synergy
effect,
(Ru-Co)Ox
nanoarrays
exhibited
outstanding
performance
as
catalyst.
Particularly,
catalyst
showed
remarkable
hydrogen
evolution
reaction
(HER)
activity
with
an
overpotential
44.1
mV
at
10
mA
cm-2
small
Tafel
slope
23.5
dec-1
,
well
excellent
oxygen
(OER)
171.2
.
As
result,
very
low
cell
voltage
1.488
V
was
needed
for
alkaline
splitting.
