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Alfred Larsson. Portrait.

Alfred Larsson

Postdoctoral fellow

Alfred Larsson. Portrait.

Hydride formation and dynamic phase changes during template-assisted Pd electrodeposition

Author

  • Giuseppe Abbondanza

Other contributions

  • Andrea Grespi
  • Alfred Larsson
  • Edvin Lundgren

Summary, in English

We investigated the structural evolution of electrochemically fabricated Pd nanowires in situ by means of grazing-incidence transmission small- and wide-angle x-ray scattering (GTSAXS and GTWAXS), x-ray fluorescence (XRF) and two-dimensional surface optical reflectance (2D-SOR). This shows how electrodeposition and the hydrogen evolution reaction (HER) compete and interact during Pd electrodepositon. During the bottom-up growth of the nanowires, we show that β-phase Pd hydride is formed. Suspending the electrodeposition then leads to a phase transition from β-phase Pd hydride to α-phase Pd. Additionally, we find that grain coalescence later hinders the incorporation of hydrogen in the Pd unit cell. GTSAXS and 2D-SOR provide complementary information on the volume fraction of the pores occupied by Pd, while XRF was used to monitor the amount of Pd electrodeposited.

Department/s

  • LU Profile Area: Light and Materials
  • LTH Profile Area: Nanoscience and Semiconductor Technology
  • Synchrotron Radiation Research
  • NanoLund: Centre for Nanoscience

Publishing year

2023

Language

English

Publication/Series

Nanotechnology

Volume

34

Issue

50

Document type

Journal article

Publisher

IOP Publishing

Topic

  • Other Physics Topics

Status

Published

ISBN/ISSN/Other

  • ISSN: 1361-6528