Current Opinion in Electrochemistry,
Journal Year:
2019,
Volume and Issue:
16, P. 90 - 95
Published: May 8, 2019
Automotive
proton-exchange
membrane
fuel
cells
(PEMFCs)
have
finally
reached
a
state
of
technological
readiness
where
several
major
automotive
companies
are
commercially
leasing
and
selling
cell
electric
vehicles,
including
Toyota,
Honda,
Hyundai.
These
now
claim
vehicle
speed
acceleration,
refueling
time,
driving
range,
durability
that
rival
conventional
internal
combustion
engines
in
most
cases
outperform
battery
vehicles.
The
residual
challenges
areas
improvement
which
remain
for
PEMFCs
performance
at
high
current
density,
durability,
cost.
expected
to
be
resolved
over
the
coming
decade
while
hydrogen
infrastructure
needs
become
widely
available.
Here,
we
briefly
discuss
status
PEMFCs,
misconceptions
about
barriers
platinum
usage
creates,
remaining
hurdles
technology
broadly
accepted
implemented.
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.
Chemical Society Reviews,
Journal Year:
2020,
Volume and Issue:
49(11), P. 3484 - 3524
Published: Jan. 1, 2020
The
urgent
need
to
address
the
high-cost
issue
of
proton-exchange
membrane
fuel
cell
(PEMFC)
technologies,
particularly
for
transportation
applications,
drives
development
simultaneously
highly
active
and
durable
platinum
group
metal-free
(PGM-free)
catalysts
electrodes.
past
decade
has
witnessed
remarkable
progress
in
exploring
PGM-free
cathode
oxygen
reduction
reaction
(ORR)
overcome
sluggish
kinetics
catalyst
instability
acids.
Among
others,
scientists
have
identified
newly
emerging
atomically
dispersed
transition
metal
(M:
Fe,
Co,
or/and
Mn)
nitrogen
co-doped
carbon
(M-N-C)
as
most
promising
alternative
PGM
catalysts.
Here,
we
provide
a
comprehensive
review
significant
breakthroughs,
remaining
challenges,
perspectives
regarding
M-N-C
terms
activity,
stability,
electrode
assembly
(MEA)
performance.
A
variety
novel
synthetic
strategies
demonstrated
effectiveness
improving
intrinsic
increasing
site
density,
attaining
optimal
porous
structures
Rationally
designing
engineering
coordination
environment
single
MNx
sites
their
local
are
crucial
enhancing
activity.
Increasing
density
relies
on
innovative
restricting
migration
agglomeration
into
metallic
clusters.
Relevant
understandings
correlations
among
nature
sites,
nanostructures,
catalytic
activity
at
atomic
scale
through
combination
experimentation
theory.
Current
knowledge
transferring
properties
MEA
performance
is
limited.
morphologic
features
play
vital
role
boosting
exposing
more
accessible
realizing
uniform
ionomer
distribution,
facilitating
mass/proton
transports.
We
outline
future
research
directions
concerning
evaluation
MEAs.
considerable
challenge
current
unsatisfied
stability
rapid
degradation
Therefore,
further
discuss
practical
methods
mitigate
degradation,
which
fundamentally
essential
make
viable
PEMFC
technologies.
Angewandte Chemie International Edition,
Journal Year:
2019,
Volume and Issue:
59(4), P. 1718 - 1726
Published: Dec. 4, 2019
A
challenging
but
pressing
task
to
design
and
synthesize
novel,
efficient,
robust
pH-universal
hydrogen
evolution
reaction
(HER)
electrocatalysts
for
scalable
sustainable
production
through
electrochemical
water
splitting.
Herein,
we
report
a
facile
method
prepare
an
efficient
Ru-M
(M=Ni,
Mn,
Cu)
bimetal
nanoparticle
carbon
quantum
dot
hybrid
(RuM/CQDs)
HER.
The
RuNi/CQDs
catalysts
exhibit
outstanding
HER
performance
at
all
pH
levels.
unexpected
low
overpotentials
of
13,
58,
18
mV
shown
by
allow
current
density
10
mA
cm-2
in
1
m
KOH,
0.5
H2
SO4
,
PBS,
respectively,
Ru
loading
5.93
μgRu
.
This
is
among
the
best
catalytic
activities
reported
any
platinum-free
electrocatalyst.
Theoretical
studies
reveal
that
Ni
doping
results
moderate
weakening
bonding
energy
nearby
surface
atoms,
which
plays
critical
role
improving
activity.
Sustainable Energy & Fuels,
Journal Year:
2020,
Volume and Issue:
4(5), P. 2114 - 2133
Published: Jan. 1, 2020
Hydrogen
production
using
water
electrolysers
equipped
with
an
anion
exchange
membrane,
a
pure
feed
and
cheap
components
(catalysts
bipolar
plates)
can
challenge
proton
membrane
electrolysis
systems
as
the
state
of
art.
Advanced Functional Materials,
Journal Year:
2020,
Volume and Issue:
31(1)
Published: Sept. 28, 2020
Abstract
Developing
high‐performance
and
cost‐effective
bifunctional
electrocatalysts
for
large‐scale
water
electrolysis
is
desirable
but
remains
a
significant
challenge.
Most
existing
nano‐
micro‐structured
require
complex
synthetic
procedures,
making
scale‐up
highly
challenging.
Here,
heterogeneous
Ni
2
P‐Fe
P
microsheet
synthesized
by
directly
soaking
foam
in
hydrochloric
acid
an
iron
nitrate
solution,
followed
phosphidation.
Benefiting
from
high
intrinsic
activity,
abundant
active
sites,
superior
transfer
coefficient,
this
self‐supported
electrocatalyst
shows
superb
catalytic
activity
toward
overall
splitting,
requiring
low
voltages
of
1.682
1.865
V
to
attain
current
densities
100
500
mA
cm
−2
1
m
KOH,
respectively.
Such
performance
the
benchmark
IrO
||
Pt/C
pair
also
places
among
best
catalysts
reported
thus
far.
Furthermore,
its
enhanced
corrosion
resistance
hydrophilic
surface
make
it
suitable
seawater
splitting.
It
able
achieve
KOH
at
1.811
2.004
V,
respectively,
which,
together
with
robust
durability,
demonstrates
great
potential
realistic
electrolysis.
This
work
presents
general
economic
approach
fabrication
metallic
phosphide
water/seawater
electrocatalysis.
