Understanding the impact of sulfur poisoning on the methane-reforming activity of a solid oxide fuel cell anode

Jun Hyuk Kim, Mingfei Liu, Yu Chen, Ryan Murphy, Yong Man Choi*, Ying Liu, Meilin Liu

*此作品的通信作者

研究成果: Article同行評審

17 引文 斯高帕斯(Scopus)

摘要

Natural gas is one of the most attractive fuels for solid oxide fuel cells (SOFCs) because of the existing fuel distribution infrastructure. Unfortunately, natural gas routinely contains small concentrations of sulfur-containing compounds, which may result in degradation in performance of fuel cells due to sulfur poisoning of Ni-based anodes. To date, the deactivation mechanism of anodes by sulfur remains poorly understood, making it extremely challenging to mitigate the problem. Here, we report our findings in unveiling the mechanism of the electrode processes on a Ni-yttria-stabilized-zirconia (Ni-YSZ) anode, enabled by highly surface-sensitive, in situ surface-enhanced Raman spectroscopy (SERS). While two different configurations of CO reformates were observed on the Ni-YSZ surface during steam methane-reforming (SMR) processes, the accumulation of S-S bonds at the sulfur-contaminated solid-gas interface significantly hinders the subsequent methane-reforming process. The identification of the key steps responsible for sulfur poisoning is vital to the development of effective strategies for minimizing the impact of sulfur on robust SOFC operations.

原文English
頁(從 - 到)13556-13566
頁數11
期刊ACS Catalysis
11
發行號21
DOIs
出版狀態Published - 5 11月 2021

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