Publication result detail

p-Type PdO nanoparticles supported on n-type WO3 nanoneedles for hydrogen sensing

VALLEJOS VARGAS, S.

Original Title

p-Type PdO nanoparticles supported on n-type WO3 nanoneedles for hydrogen sensing

English Title

p-Type PdO nanoparticles supported on n-type WO3 nanoneedles for hydrogen sensing

Type

WoS Article

Original Abstract

We report the synthesis of palladium nanopartide (NP) decorated WO3 nanoneedles (NNs) employing a singlestep, aerosol assisted chemical vapor deposition approach. Two different Pd precursors were investigated in view of optimizing the morphology and the gas sensing performance of the resulting nanostructured films. In particular, palladium acetylacetonate was found to be more suitable than ammonium hexachloropalladate for obtaining n-type WO3 NNs uniformly decorated with well dispersed p-type PdO NPs. The active films could be directly deposited on the electrode area of microelectromechanical system-based resistive transducers. The morphology and chemical composition of the films was investigated by scanning electron microscopy, high-resolution transmission electron microscopy, Raman spectroscopy and X-ray photoelectron spectroscopy analysis. PdO-decorated WO3 NNs show a response toward hydrogen that is about 680 times higher than that of bare WO3 NNs. Finally, PdO-loaded sensors display extremely low-cross sensitivity to water vapor, which makes them remarkably immune to changes in the background humidity.

English abstract

We report the synthesis of palladium nanopartide (NP) decorated WO3 nanoneedles (NNs) employing a singlestep, aerosol assisted chemical vapor deposition approach. Two different Pd precursors were investigated in view of optimizing the morphology and the gas sensing performance of the resulting nanostructured films. In particular, palladium acetylacetonate was found to be more suitable than ammonium hexachloropalladate for obtaining n-type WO3 NNs uniformly decorated with well dispersed p-type PdO NPs. The active films could be directly deposited on the electrode area of microelectromechanical system-based resistive transducers. The morphology and chemical composition of the films was investigated by scanning electron microscopy, high-resolution transmission electron microscopy, Raman spectroscopy and X-ray photoelectron spectroscopy analysis. PdO-decorated WO3 NNs show a response toward hydrogen that is about 680 times higher than that of bare WO3 NNs. Finally, PdO-loaded sensors display extremely low-cross sensitivity to water vapor, which makes them remarkably immune to changes in the background humidity.

Keywords

Aerosol-assisted chemical vapor desposition; Hydrogen sensor; Palladium oxide; Tungsten oxide; Nanoneedles

Key words in English

Aerosol-assisted chemical vapor desposition; Hydrogen sensor; Palladium oxide; Tungsten oxide; Nanoneedles

Authors

VALLEJOS VARGAS, S.

RIV year

2021

Released

26.08.2016

ISBN

0040-6090

Periodical

Thin Solid Films

Volume

618

Number

special issue

State

Kingdom of the Netherlands

Pages from

238

Pages to

245

Pages count

8

URL

https://doi.org/10.1016/j.tsf.2016.08.053

BibTex

@article{BUT170139,
  author="Stella {Vallejos Vargas}",
  title="p-Type PdO nanoparticles supported on n-type WO3 nanoneedles for hydrogen sensing",
  journal="Thin Solid Films",
  year="2016",
  volume="618",
  number="special issue",
  pages="238--245",
  doi="10.1016/j.tsf.2016.08.053",
  issn="0040-6090",
  url="https://doi.org/10.1016/j.tsf.2016.08.053"
}