Co-improving the electrocatalytic performance and H2S tolerance of a Sr2Fe1.5Mo0.5O6−δ based anode for solid oxide fuel cells

Chunming Xu, Lihong Zhang, Wang Sun*, Rongzheng Ren, Xiaoxia Yang, Minjian Ma, Jinshuo Qiao, Zhenhua Wang, Shuying Zhen, Kening Sun*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

Co-improving the structural stability and electrocatalytic activity of anode materials is a major challenge for the development of solid oxide fuel cells (SOFCs). Herein, a novel anode material Sr2Fe1.5Mo0.4Ti0.1O6−δ (SFMT) is designed and prepared by using Ti to replace Mo of Sr2Fe1.5Mo0.5O6−δ (SFM). Ti doping effectively enhances the ability of SFM to resist H2S corrosion and SFMT maintains the desired perovskite structure after being exposed to H2S (1000 ppm). Moreover, the partial replacement of Mo5+/Mo6+ by Ti4+ ions can also improve the concentration of oxygen vacancies and enhance the oxygen ion surface exchange and bulk diffusion capabilities. The SFMT-based SOFC delivers an excellent power output in H2 containing 500 ppm H2S and stably operates for a long time (>50 h), resulting in a maximum power density of 0.71 W cm−2 at 800 °C. The current study presents a promising material design strategy for developing high-performance SOFC anodes.

Original languageEnglish
Pages (from-to)16280-16289
Number of pages10
JournalJournal of Materials Chemistry A
Volume10
Issue number30
DOIs
Publication statusPublished - 21 Jul 2022

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