In situ solution plasma synthesis of silver nanoparticles supported on nitrogen-doped carbons with enhanced oxygen reduction activity

Gasidit Panomsuwan, Jidapa Chantaramethakul, Chayanaphat Chokradjaroen, Takahiro Ishizaki

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Abstract

Silver nanoparticles supported on nitrogen-doped carbons (Ag/NC) were in situ synthesized by a solution plasma process. In the solution plasma, Ag nanoparticles were produced via the sputtering of Ag electrode, while the NC supports were simultaneously synthesized from 2-cyanopyridine (C 6 H 4 N 2 ). The results of the characterization show that Ag nanoparticles had good crystallinity and the NC supports possessed an amorphous structure. The oxygen reduction reaction (ORR) catalyzed on Ag/NC proceeded via the co-existence of two and four-electron pathways in alkaline solution, with the four-electron pathway being found to be more dominant. An enhanced ORR activity of Ag/NC was attributed to the synergistic effect of Ag nanoparticles and NC supports. Moreover, Ag/NC exhibited long-term durability and high resistance to methanol oxidation in comparison with the commercial Pt/C catalyst.

Original languageEnglish
Pages (from-to)135-139
Number of pages5
JournalMaterials Letters
Volume251
DOIs
Publication statusPublished - 2019 Sep 15

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Keywords

  • Electrocatalyst
  • Nitrogen-doped carbon
  • Oxygen reduction reaction
  • Silver nanoparticles
  • Solution plasma

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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