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

Zhihong Du; Hailei Zhao; Sha Yi; Qing Xia; Yue Gong; Yang Zhang; Xing Cheng; Yan Li; Lin Gu; Konrad Świerczek

doi:10.1021/acsnano.6b03979

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

ACS Nano. 2016 Sep 27;10(9):8660-9. doi: 10.1021/acsnano.6b03979. Epub 2016 Aug 19.

Authors

Zhihong Du¹, Hailei Zhao^{1

2}, Sha Yi¹, Qing Xia¹, Yue Gong³, Yang Zhang¹, Xing Cheng¹, Yan Li⁴, Lin Gu³, Konrad Świerczek⁵

Affiliations

¹ School of Materials Science and Engineering, University of Science and Technology Beijing , Beijing 100083, China.
² The Beijing Municipal Key Laboratory of New Energy Materials and Technologies , Beijing 100083, China.
³ Beijing National Laboratory for Condensed Matter Physics Institute of Physics, Chinese Academy of Sciences , Beijing 100190, China.
⁴ Department of Materials Science and Engineering, Beijing Institute of Petrochemical Technology , Beijing 102617, China.
⁵ Faculty of Energy and Fuels, Department of Hydrogen Energy, AGH University of Science and Technology , 30-059 Krakow, Poland.

PMID: 27529355
DOI: 10.1021/acsnano.6b03979

Abstract

A metallic nanoparticle-decorated ceramic anode was prepared by in situ reduction of the perovskite Sr2FeMo0.65Ni0.35O6-δ (SFMNi) in H2 at 850 °C. The reduction converts the pure perovksite phase into mixed phases containing the Ruddlesden-Popper structure Sr3FeMoO7-δ, perovskite Sr(FeMo)O3-δ, 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-δ electrolyte supported a single cell with SFMNi as the anode reached 590, 793, and 960 mW cm(-2) in wet H2 at 750, 800, and 850 °C, respectively. The Sr2FeMo0.65Ni0.35O6-δ 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.

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

Publication types

Research Support, Non-U.S. Gov't