Expert Systems,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Aug. 8, 2024
Abstract
This
article
conducts
a
systematic
mapping
and
inductive
analysis
of
existing
work
related
to
hydrogen
energy
policy
in
the
Web
Science
Core
Collection
from
1996
7
July
2023.
First,
based
on
bibliometrics,
research
reveals
publication
volume
trends,
influential
contributors
(countries,
authors,
organizations
journals).
Second,
bibliometric
content
were
applied
vividly
demonstrate
evolution
topic,
discuss
leading
topics,
provide
valuable
insights
into
issues
that
deserving
appropriate
attention
future.
The
unequivocal
role
policies
supporting
development
is
undeniable.
In
future,
focal
point
should
be
concentrated
stimulating
creation
demand
for
green
hydrogen,
necessitating
effective
evaluation
outcomes
ensuring
safety
energy.
Furthermore,
application
scope
extends
beyond
transportation
sector,
holding
potential
expansion
other
high
carbon‐emitting
domains.
With
strengthening
international
collaboration
energy,
considerations
justice
fairness
are
poised
become
pivotal
factors
cooperation,
exerting
profound
influence
attainment
long‐term
environmental
sustainability.
These
critical
directions
will
shape
future
landscape
serve
as
an
essential
resource
policymakers,
researchers,
stakeholders
this
domain.
ChemPhysMater,
Journal Year:
2023,
Volume and Issue:
unknown
Published: Oct. 1, 2023
Hydrogen,
a
clean
and
versatile
energy
carrier,
has
gained
significant
attention
as
potential
solution
for
addressing
the
challenges
of
climate
change
sustainability.
Efficient
hydrogen
production
relies
heavily
on
development
advanced
materials
that
enable
cost-effective
sustainable
methods.
This
review
article
presents
comprehensive
overview
cutting-edge
used
production,
covering
both
traditional
emerging
technologies.
begins
by
briefly
introducing
importance
carrier
various
methods
production.
emphasizes
critical
role
these
in
enabling
efficient
generation.
Traditional
methods,
such
steam
methane
reforming,
coal
gasification,
biomass
water
electrolysis,
are
discussed,
highlighting
their
advantages
limitations.
then
focuses
technologies
have
shown
promise
achieving
Photocatalytic
splitting
is
explored
with
an
emphasis
recent
advancements
semiconductor-based
photocatalysts
nanostructured
enhanced
photocatalysis.
Solid
oxide
electrolysis
cells
(SOEC)
examined,
discussing
high-temperature
electrolytes
electrode
materials.
Biological
chemical
looping
also
use
microorganisms,
bioengineered
systems,
metal
oxides
oxygen
carriers,
catalysts
improved
Advanced
characterization
techniques,
including
X-ray
diffraction,
spectroscopy,
scanning
electron
microscopy,
transmission
photoelectron
Auger
thermogravimetric
analysis,
differential
calorimetry,
been
to
gain
insight
into
properties
performances
concludes
prospects
field
highlights
durability,
stability,
cost-effectiveness,
scalability,
integration
large-scale
pchiroduction
systems.
discusses
trends
breakthroughs
could
shape
future
Applied Physics Letters,
Journal Year:
2024,
Volume and Issue:
124(10)
Published: March 4, 2024
Based
on
theoretical
calculations
and
experiments,
the
crystal
structure,
electronic
magnetism,
magnetocaloric
effect
(MCE)
of
Ho5B2C5
compound
have
been
systematically
investigated.
The
with
a
typical
metallic
nature
was
found
to
crystallize
in
tetragonal
structure
belonging
space
group
P4/ncc
(No.
130),
its
magnetic
ground
state
identified
as
ferromagnetic
(FM)
ordering
based
experimental
results.
Additionally,
second-order
phase
transition
from
FM
paramagnetic
around
approximately
27
K
observed
compound,
resulting
large
MCE.
Under
varying
fields
(ΔH)
0
7
T,
maximum
entropy
change
(−ΔSMmax),
refrigeration
capacity
(RC),
δTFWHM
are
21.3
J/kg
K,
1001.6
J/kg,
60.2
(a
wide
temperature
range
15.2
75.4
K),
respectively.
outstanding
MCE
performance
is
expected
facilitate
progress
for
hydrogen
liquefaction.
