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Nanoarchitectured Pt–Pd foams as novel hydrogen reservoirs through Pt–H bonding

Khan, Wahidullah ; Thill, Alisson S. ; Girotto, Gustavo Z. LU orcid ; Vogt, Marco A.H. ; Escudero, Carlos ; Poletto, Fernanda ; Perez-Dieste, Virginia and Bernardi, Fabiano (2026) In Journal of Materials Chemistry A 14(2). p.962-970
Abstract

Hydrogen is a promising candidate to be the main renewable energy source in the future, but there has been limited development of hydrogen storage methods. PtxPd100−x (25 ≤ x ≤ 75) nanostructures composed of a mixture of nanofoams and nanoparticles are synthesized with a Pt-rich core and a Pd-rich shell atomic structure. We observed that the higher the amount of Pd, the higher the hydrogen uptake. Nevertheless, AP-XPS measurements show that hydrogen is mainly stored at the Pt core subsurface. Pd is not a bystander, but rather it helps the hydrogen diffusion, enabling an improved hydrogen storage capacity. This occurs in the nanofoams as nano-XANES measurements at the Pt L3 edge demonstrate that the main... (More)

Hydrogen is a promising candidate to be the main renewable energy source in the future, but there has been limited development of hydrogen storage methods. PtxPd100−x (25 ≤ x ≤ 75) nanostructures composed of a mixture of nanofoams and nanoparticles are synthesized with a Pt-rich core and a Pd-rich shell atomic structure. We observed that the higher the amount of Pd, the higher the hydrogen uptake. Nevertheless, AP-XPS measurements show that hydrogen is mainly stored at the Pt core subsurface. Pd is not a bystander, but rather it helps the hydrogen diffusion, enabling an improved hydrogen storage capacity. This occurs in the nanofoams as nano-XANES measurements at the Pt L3 edge demonstrate that the main phases of the nanofoams and nanoparticles are metallic Pt and PtO, respectively. Finally, DFT calculations show a d-band upshift for the Pd-richer samples, which gives a stronger bonding with hydrogen, and helps to explain the distinguished hydrogen storage capacity found.

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author
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publishing date
type
Contribution to journal
publication status
published
in
Journal of Materials Chemistry A
volume
14
issue
2
pages
9 pages
publisher
Royal Society of Chemistry
external identifiers
  • scopus:105026566948
ISSN
2050-7488
DOI
10.1039/d5ta04270d
language
English
LU publication?
no
additional info
Publisher Copyright: This journal is © The Royal Society of Chemistry, 2026
id
892d720c-6c2f-4422-a716-f15a3112f01c
date added to LUP
2026-07-03 10:55:22
date last changed
2026-07-03 16:39:30
@article{892d720c-6c2f-4422-a716-f15a3112f01c,
  abstract     = {{<p>Hydrogen is a promising candidate to be the main renewable energy source in the future, but there has been limited development of hydrogen storage methods. Pt<sub>x</sub>Pd<sub>100−x</sub> (25 ≤ x ≤ 75) nanostructures composed of a mixture of nanofoams and nanoparticles are synthesized with a Pt-rich core and a Pd-rich shell atomic structure. We observed that the higher the amount of Pd, the higher the hydrogen uptake. Nevertheless, AP-XPS measurements show that hydrogen is mainly stored at the Pt core subsurface. Pd is not a bystander, but rather it helps the hydrogen diffusion, enabling an improved hydrogen storage capacity. This occurs in the nanofoams as nano-XANES measurements at the Pt L<sub>3</sub> edge demonstrate that the main phases of the nanofoams and nanoparticles are metallic Pt and PtO, respectively. Finally, DFT calculations show a d-band upshift for the Pd-richer samples, which gives a stronger bonding with hydrogen, and helps to explain the distinguished hydrogen storage capacity found.</p>}},
  author       = {{Khan, Wahidullah and Thill, Alisson S. and Girotto, Gustavo Z. and Vogt, Marco A.H. and Escudero, Carlos and Poletto, Fernanda and Perez-Dieste, Virginia and Bernardi, Fabiano}},
  issn         = {{2050-7488}},
  language     = {{eng}},
  month        = {{01}},
  number       = {{2}},
  pages        = {{962--970}},
  publisher    = {{Royal Society of Chemistry}},
  series       = {{Journal of Materials Chemistry A}},
  title        = {{Nanoarchitectured Pt–Pd foams as novel hydrogen reservoirs through Pt–H bonding}},
  url          = {{http://dx.doi.org/10.1039/d5ta04270d}},
  doi          = {{10.1039/d5ta04270d}},
  volume       = {{14}},
  year         = {{2026}},
}