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Electrooxidation of single-carbon molecules by nanostructured Pd-decorated spongy ceria

Authors
  • Yavari, Zahra1, 1
  • Afarani, Mahdi Shafiee1
  • Arabi, Amir Masoud2
  • Noroozifar, Meissam3
  • 1 University of Sistan and Baluchestan, Zahedan, Iran , Zahedan (Iran)
  • 2 Institute for Color Science and Technology (ICST), Tehran, Iran , Tehran (Iran)
  • 3 University of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario, M1C 1A4, Canada , Toronto (Canada)
Type
Published Article
Journal
Korean Journal of Chemical Engineering
Publisher
Springer-Verlag
Publication Date
Oct 13, 2020
Volume
37
Issue
10
Pages
1669–1679
Identifiers
DOI: 10.1007/s11814-020-0571-9
Source
Springer Nature
Keywords
License
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Abstract

Solution combustion synthesis is proposed to fabricate spongy ceria by using two different fuels for combustion: glycine and urea. As-prepared samples are labeled as SCOGl and SCOUr The acid-base properties of the cavities and surfaces of specimens are determined by measuring the pH of zero charges. Both SCOGl and SCOUr powders are decorated by the nanostructured Pd (NSPd) by the wetness incorporation. The NSPd-SCOGl and NSPd-SCOUr represent the high mass current density than NSPd as non-supported palladium for the electrooxidation of single-carbon molecules: methanol, formaldehyde and formic acid. The results show that the NSPd-SCOGl and NSPd-SCOUr are exceptional heterogeneous catalysts. The SCO as the support with porous structural network has been affected considerably on the electrochemical surface area, dispersion, and durability of NSPd. On the other hand, it can be effective for removing the poisoning species of the electrooxidation of single-carbon molecules on NSPd through the lattice oxygen, and the activation of an oxidation-reduction cycle between the high and low chemical valences of cerium, leading to improve the electrocatalytic efficiency of NSPd. Finally, it is confirmed the conversion of methanol to formaldehyde, and then to formic acid during electrooxidation by using cyclic voltammetry studies.

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