Pd coated one-dimensional Ag nanostructures: Controllable architecture and their electrocatalytic performance for ethanol oxidation in alkaline media

Minh Truong Xuan Nguyen, Kha Nguyen, Phuong Thi Thuy Pham, Ha Ky Phuong Huynh, Son Truong Nguyen

Research output: Contribution to journalArticleScientificpeer-review

12 Citations (Scopus)
70 Downloads (Pure)

Abstract

One-dimensional (1D) metal-coated Pd structures are efficient catalysts for the ethanol electro-oxidation and promising strategy for minimizing the Pd-loading toward commercialization of direct ethanol fuel cells (DEFCs). Herein, the decorated and core-shell architectures of a novel Pd coating on Ag nanowires (PdAg-NWs) are controllable by a two-step polyol method based on the galvanic replacement reaction. The integration of uniform shell with a low Pd concentration and partial hollow structure onto 1D PdAg-NWs exhibits the highest efficiency for ethanol oxidation reaction (EOR) in alkaline solution. In comparison with Pd nanoparticles (PdNPs/C), the PdAgNWs/C performes 11 times superior EOR activity, and the onset potential shifts 80 mV negatively. The presence of Ag in PdAg-NWs enhances the absorption capacity of ethanol molecules and hydroxyl ions on the active sites, and improves the catalyst tolerance to CO-like intermediates, making them a potential anodic catalyst for DEFCs.
Original languageEnglish
Pages (from-to)3909-3921
Number of pages13
JournalInternational Journal of Hydrogen Energy
Volume46
Issue number5
Early online date2020
DOIs
Publication statusPublished - 19 Jan 2021
MoE publication typeA1 Journal article-refereed

Keywords

  • PdAg nanowire
  • Low Pd-loading
  • Core-shell
  • Direct ethanol fuel cells
  • Electrochemical durability
  • CO poisoning tolerance

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