Coke-Free Oxidation of Methanol in Solid Oxide Fuel Cells with Heterogeneous Nickel-Palladium Catalysts Prepared by Atomic Layer Deposition

Dong Young Jang, Junmo Koo, Hyeon Rak Choi, Jun Woo Kim, Heon Jae Jeong, Fritz B. Prinz, Joon Hyung Shim

Research output: Contribution to journalArticle

Abstract

Bimetallic Ni/Pd anodic catalysts are synthesized for application in direct methanol solid oxide fuel cells (DMSOFCs). Pd nanoparticles are deposited on the surface of porous Ni, prepared by sputtering, via atomic layer deposition (ALD). The amount of ALD Pd is optimized by varying the number of ALD cycles (150, 300, and 600 cycles). The power output of fuel cells employing the ceramic electrolyte-support pellets is enhanced by 3-6 times with optimal ALD Pd treatment compared to that of the cell with a bare Ni anode. The anode kinetics and stability against carbon coking are significantly improved by the ALD Pd surface treatment. The surface of the anode with ALD Pd remains clean after a fuel cell test with methanol, whilst severe growth of carbon fibers is observed on the bare Ni surface. The ALD Pd cell exhibits superior long-term stability compared to the bare Ni anode.

Original languageEnglish
Pages (from-to)10529-10535
Number of pages7
JournalACS Sustainable Chemistry and Engineering
Volume8
Issue number28
DOIs
Publication statusPublished - 2020 Jul 20

Keywords

  • atomic layer deposition
  • catalyst
  • liquid fuel
  • methanol
  • nickel
  • palladium
  • solid oxide fuel cell

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Renewable Energy, Sustainability and the Environment

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