Advanced Energy Materials,
Journal Year:
2023,
Volume and Issue:
13(43)
Published: Oct. 6, 2023
Abstract
Hydrogen
production
from
water
electrolysis
plays
an
important
role
for
the
development
of
hydrogen‐based
energy
sources.
Developing
efficient
electrocatalysts
is
crucial
accelerating
reaction
kinetics
and
achieving
large‐scale
electrolysis.
Despite
significant
advancements
in
hydrogen
evolution
(HER)
achieved
over
past
few
decades,
there
remains
a
lack
comprehensive
discussion
on
in‐depth
mechanism
enhanced
activity,
particularly
with
regard
to
active
intermediates.
Recently,
state‐of‐the‐art
characterization
methods
theoretical
computation,
optimizing
interaction
between
intermediates
corresponding
sites
has
been
demonstrated
as
effective
strategy
enhance
intrinsic
catalytic
activity.
Herein,
recent
advances
design
guided
by
HER
are
presented.
Emphasis
focused
key
that
determine
activity
strategies
tune
Finally,
outlook
future
challenges
perspectives
based
given.
Nature Communications,
Journal Year:
2023,
Volume and Issue:
14(1)
Published: July 14, 2023
Electrochemical
hydrogen
evolution
reaction
in
neutral
media
is
listed
as
the
most
difficult
challenges
of
energy
catalysis
due
to
sluggish
kinetics.
Herein,
Ir-HxWO3
catalyst
readily
synthesized
and
exhibits
enhanced
performance
for
reaction.
HxWO3
support
functioned
proton
sponge
create
a
local
acid-like
microenvironment
around
Ir
metal
sites
by
spontaneous
injection
protons
WO3,
evidenced
spectroscopy
electrochemical
analysis.
Rationalize
revitalized
lattice-hydrogen
species
located
interface
are
coupled
with
Had
atoms
on
metallic
surfaces
via
thermodynamically
favorable
Volmer-Tafel
steps,
thereby
fast
Elaborated
demonstrates
activity
low
overpotential
20
mV
at
10
mA
cm-2
Tafel
slope
28
dec-1,
which
even
comparable
those
acidic
environment.
The
concept
exemplified
this
work
offer
possibilities
tailoring
regulate
catalytic
pathway.
Nature Communications,
Journal Year:
2023,
Volume and Issue:
14(1)
Published: Sept. 2, 2023
The
lack
of
available
protons
severely
lowers
the
activity
alkaline
hydrogen
evolution
reaction
process
than
that
in
acids,
which
can
be
efficiently
accelerated
by
tuning
coverage
and
chemical
environment
on
catalyst
surface.
However,
cycling
active
sites
proton
transfer
is
largely
dependent
utilization
noble
metal
catalysts
because
appealing
electronic
interaction
between
atoms
protons.
Herein,
an
all-non-noble
W/WO2
metallic
heterostructure
serving
as
efficient
solid-acid
exhibits
remarkable
performance
with
ultra-low
overpotential
-35
mV
at
-10
mA/cm2
a
small
Tafel
slope
(-34
mV/dec),
well
long-term
durability
production
(>50
h)
current
densities
-50
electrolyte.
Multiple
situ
ex
spectroscopy
characterizations
combining
first-principle
density
functional
theory
calculations
discover
dynamic
proton-concentrated
surface
constructed
under
overpotentials,
enables
catalyzing
to
follow
kinetically
fast
Volmer-Tafel
pathway
two
neighboring
recombining
into
molecule.
Our
strategy
multiple
may
provide
interesting
route
for
designing
advanced
catalytic
system
towards
boosting
ACS Catalysis,
Journal Year:
2023,
Volume and Issue:
13(5), P. 3101 - 3108
Published: Feb. 16, 2023
Even
though
electrocatalytic
CO2
reduction
reaction
(CO2RR)
to
formate
has
made
significant
advances,
achieving
a
high
cell
energy
efficiency
at
industrial-level
current
densities
is
still
bottleneck
for
the
large-scale
application
of
this
technology.
SnO2
promising
electrocatalyst
production
but
restricted
by
unstable
oxidation
state
under
potentials,
causing
catalyst
reconstruction
and
inactivation.
Herein,
we
present
an
atomic
doping
strategy
(by
Cu,
Bi,
or
Pt)
trigger
emergence
oxygen
vacancy
in
lattice
stabilize
during
CO2RR.
As
result,
optimal
Cu-incorporated
can
keep
Faradic
>80%
about
50–60%
wide
range
up
500
mA
cm–2
commercial
flow
cell,
surpassing
most
reported
works.
A
set
situ
spectroscopy
measurements
controlled
electrochemical
tests
suggest
that
vacancy,
induced
participation
Cu/Bi/Pt
single
atoms,
holds
key
stabilizing
as
well
promoting
adsorption
formate-related
*OCHO
intermediate.
qualitative
relationship
between
concentration
CO2-to-formate
conversion
constructed
on
series
doped
catalysts.
Angewandte Chemie International Edition,
Journal Year:
2023,
Volume and Issue:
62(26)
Published: March 8, 2023
The
slow
water
dissociation
process
in
alkaline
electrolyte
severely
limits
the
kinetics
of
HER.
orientation
H2
O
is
well
known
to
affect
process,
but
hard
control
because
its
random
distribution.
Herein,
an
atomically
asymmetric
local
electric
field
was
designed
by
IrRu
dizygotic
single-atom
sites
(IrRu
DSACs)
tune
adsorption
configuration
and
orientation,
thus
optimizing
process.
intensity
DSACs
over
4.00×1010
N/C.
ab
initio
molecular
dynamics
simulations
combined
with
situ
Raman
spectroscopy
analysis
on
behavior
show
that
M-H
bond
length
(M=active
site)
shortened
at
interface
due
strong
gradient
optimized
promotes
interfacial
water.
This
work
provides
a
new
way
explore
role
single
atomic
hydrogen
evolution
reaction.
Nature Communications,
Journal Year:
2024,
Volume and Issue:
15(1)
Published: March 29, 2024
Abstract
Establishing
appropriate
metal-support
interactions
is
imperative
for
acquiring
efficient
and
corrosion-resistant
catalysts
water
splitting.
Herein,
the
interaction
mechanism
between
Ru
nanoparticles
a
series
of
titanium
oxides,
including
TiO,
Ti
4
O
7
TiO
2,
designed
via
facile
non-stoichiometric
engineering
systematically
studied.
7,
with
unique
band
structure,
high
conductivity
chemical
stability,
endows
ingenious
through
interfacial
Ti–O–Ru
units,
which
stabilizes
species
during
OER
triggers
hydrogen
spillover
to
accelerate
HER
kinetics.
As
expected,
Ru/Ti
displays
ultralow
overpotentials
8
mV
150
long
operation
500
h
at
10
mA
cm
−2
in
acidic
media,
expanded
pH-universal
environments.
Benefitting
from
excellent
bifunctional
performance,
proton
exchange
membrane
anion
electrolyzer
assembled
achieves
superior
performance
robust
operation.
The
work
paves
way
energy
conversion
devices.
ACS Nano,
Journal Year:
2023,
Volume and Issue:
17(21), P. 20804 - 20824
Published: Nov. 3, 2023
The
splitting
of
water
through
electrocatalysis
offers
a
sustainable
method
for
the
production
hydrogen.
In
alkaline
electrolytes,
lack
protons
forces
dissociation
to
occur
before
hydrogen
evolution
reaction
(HER).
While
pure
Pt
is
gold
standard
electrocatalyst
in
acidic
since
5d
orbital
nearly
fully
occupied,
when
it
overlaps
with
molecular
water,
generates
Pauli
repulsion.
As
result,
formation
Pt–H*
bond
an
environment
difficult,
which
slows
HER
and
negates
benefits
using
catalyst.
To
overcome
this
limitation,
can
be
alloyed
transition
metals,
such
as
Fe,
Co,
Ni.
This
approach
has
potential
not
only
enhance
performance
but
also
increase
dispersion
decrease
its
usage,
thus
overall
improving
catalyst's
cost-effectiveness.
excellent
adsorption
ability
metals
contributes
generation
proton-rich
local
near
Pt-based
alloy
that
promotes
HER.
Significant
progress
been
achieved
comprehending
mechanism
manipulation
structure
composition
electrocatalysts
based
on
alloy.
objective
review
analyze
condense
latest
developments
It
focuses
modified
alloys
clarifies
design
principles
catalytic
catalysts
from
both
experimental
theoretical
perspective.
highlights
some
difficulties
encountered
during
opportunities
increasing
performance.
Finally,
guidance
development
more
efficient
provided.
