Catalysts characteristics of Ni/YSZ core-shell according to plating conditions using electroless plating

Hyun Wook Park, Jae Won Jang, Young Jin Lee, Jin Ho Kim, Dae Woo Jeon, Jong Heun Lee, Hae jin Hwang, Mi Jai Lee

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

This study aims to develop an anode catalyst for a solid oxide fuel cell (SOFC) using electroless nickel plating. We have proposed a new method for electroless plating of Ni metal on yttria-stabilized zirconia (YSZ) particles. We examine the uniformity of the Ni layer on the plated core-shell powder, in addition to the content of Ni and the reproducibility of the plating. We have also evaluated the carbon deposition rate and characteristics of the SOFC anode catalyst. To synthesize Ni-plated YSZ particles, the plated powder is heat-treated at 1200 °C. The resultant particles, which have an average size of 50 μm, were subsequently used in the experiment. The size of the Ni particles and the Ni content both increase with increasing plating temperature and plating time. The X-ray diffraction pattern reveals the growth of Ni particles. After heat-treatment, Ni is oxidized to NiO, leading to the co-existence of Ni and NiO; Ni3P is also observed due to the presence of phosphorous in the plating solution. Following heat treatment for 1 h at 1200 °C, Ni is mostly oxidized to NiO. The carbon deposition rate of the reference YSZ powder is ~135%, while that of the Ni-plated YSZ is 1%-6%.

Original languageEnglish
Pages (from-to)1227-1233
Number of pages7
JournalMetals and Materials International
Volume23
Issue number6
DOIs
Publication statusPublished - 2017 Nov 1

Keywords

  • composites
  • core-shell
  • plating
  • stabilized zirconia
  • surface

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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