4.8 Article

High-Performance Anode Material Sr2FeMo0.65Ni0.35O6-δ with In Situ Exsolved Nanoparticle Catalyst

Journal

ACS NANO
Volume 10, Issue 9, Pages 8660-8669

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/acsnano.6b03979

Keywords

nanoparticle catalysts; in situ exsolution; electrochemical performance; anode; solid oxide fuel cells

Funding

  1. National Basic Research Program of China [2013CB934003, 2012CB215405]
  2. Guangdong Industry-Academy-Research Alliance [2012B091100129]
  3. National Nature Science Foundation of China [51302275, 51402019]
  4. Program of Introducing Talents of Discipline to Universities [B14003]
  5. Strategic Priority Research Program of Chinese Academy of Sciences [XDB07030200]
  6. National Program on Key Basic Research Project [2014CB921002]
  7. National Natural Science Foundation of China [51522212, 51421002]

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A metallic nanoparticle-decorated ceramic anode was prepared by in situ reduction of the perovskite Sr2FeMo0.65Ni0.35O6-delta (SFMNi) in H-2 at 850 degrees C. The reduction converts the pure perovksite phase into mixed phases containing the Ruddlesden- Popper structure Sr3FeMoO7-delta, perovskite Sr(FeMo)O3-delta, and the FeNi3 bimetallic alloy nanoparticle catalyst. The electrochemical performance of the SFMNi ceramic anode is greatly enhanced by the in situ exsolved Fe-Ni alloy nanoparticle catalysts that are homogeneously distributed on the ceramic backbone surface. The maximum power densities of the La0.8Sr0.2Ga0.8Mg0.2O3-delta electrolyte supported a single cell with SFMNi as the anode reached 590, 793, and 960 mW cm(-2) in wet H-2 at 750, 800, and 850 degrees C, respectively. The Sr2FeMo0.65Ni0.35O6-delta anode also shows excellent structural stability and good coking resistance in wet CH4. The prepared SFMNi material is a promising high-performance anode for solid oxide fuel cells.

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