Size Effect of Atomic Gold Clusters for Carbon Monoxide Passivation at Rucore-Ptshell Nanocatalysts

Tsan Yao Chen, Yu Ting Liu, Jeng Han Wang, Guo Wei Lee, Po Wei Yang, Kuan Wen Wang

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The surface of Ptshell-Rucore nanocatalysts was modified with an atomic-scaled Au cluster of different sizes by a polyol reduction technique using sequence and composition control. Our results, combining the structure, surface chemical analysis, and density functional theory calculation, elucidate that these clusters reduced the oxidation current of carbon monoxide to a maximum extent of ∼53%; consequently, the anti-CO poisoning factor of the NCs was doubled by increasing the Au/Pt ratios from 0 to 15 at%. Such substantial improvement is caused by steric shielding and the electron localization field that reject the sorption of electronegative ligands/molecules at the NC surface by Au clusters. Most importantly, this work clarifies the mechanistic insights of the charge relocation at core-shell nanoparticles by subnanoscaled cluster intercalation and the impacts of cluster size for the chemical durability of catalysts in fuel cell applications.

Original languageEnglish
Pages (from-to)7621-7628
Number of pages8
JournalJournal of Physical Chemistry C
Volume120
Issue number14
DOIs
Publication statusPublished - 2016 Apr 21

Fingerprint

Carbon Monoxide
Passivation
Carbon monoxide
Gold
carbon monoxide
passivity
gold
Relocation
Polyols
Intercalation
Chemical analysis
Shielding
Density functional theory
Sorption
Fuel cells
Durability
relocation
Ligands
Nanoparticles
poisoning

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

Cite this

Size Effect of Atomic Gold Clusters for Carbon Monoxide Passivation at Rucore-Ptshell Nanocatalysts. / Chen, Tsan Yao; Liu, Yu Ting; Wang, Jeng Han; Lee, Guo Wei; Yang, Po Wei; Wang, Kuan Wen.

In: Journal of Physical Chemistry C, Vol. 120, No. 14, 21.04.2016, p. 7621-7628.

Research output: Contribution to journalArticle

Chen, Tsan Yao ; Liu, Yu Ting ; Wang, Jeng Han ; Lee, Guo Wei ; Yang, Po Wei ; Wang, Kuan Wen. / Size Effect of Atomic Gold Clusters for Carbon Monoxide Passivation at Rucore-Ptshell Nanocatalysts. In: Journal of Physical Chemistry C. 2016 ; Vol. 120, No. 14. pp. 7621-7628.
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