Infiltrated Ni0.08Co0.02CeO2-x@Ni0.8Co0.2 catalysts for a finger-like anode in direct methane-fueled solid oxide fuel cells

Nai Shi, Yun Xie, Yi Yang, Daoming Huan, Yang Pan, Ranran Peng, Changrong Xia, Chusheng Chen, Zhongliang Zhan, Yalin Lu

Research output: Contribution to journalArticlepeer-review

Abstract

Direct utilization of methane in solid oxide fuel cells (SOFCs) is greatly impeded by the grievous carbon deposition and the much depressed catalytic activity. In this work, a promising anode, taking finger-like porous YSZ as the anode substrate and impregnated Ni0.08Co0.02Ce0.9O2-δ@Ni0.8Co0.2O as the novel catalyst, is fabricated via the phase conversion-combined tape-casting technique. This anode shows commendable mechanical strength and excellent catalytic activity and stability toward the methane conversion reactions, which is attributed to the exsolved alloy nanoparticles and the active oxygen species on the reduced Ni0.08Co0.02Ce0.9O2-δ catalyst as well as the facilitated methane transport rooting in the special open-pore microstructure of the anode substrate. Strikingly, this button cell delivers an excellent peak power density of 730 mW cm-2 at 800 °C in 97% CH4/3% H2O fuel, only 9% lower than that in 97% H2/3% H2O. Our work shed new light on the SOFC anode developments.

Original languageEnglish
Pages (from-to)4943-4954
Number of pages12
JournalACS Applied Materials and Interfaces
Volume13
Issue number4
DOIs
Publication statusPublished - Feb 3 2021
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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