Identification of a Methane Oxidation Intermediate on Solid Oxide Fuel Cell Anode Surfaces with Fourier Transform Infrared Emission

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• 作者：Michael B. Pomfret ; Daniel A. Steinhurst ; Jeffrey C. Owrutsky
• 刊名：The Journal of Physical Chemistry Letters
• 出版年：2013
• 出版时间：April 18, 2013
• 年：2013
• 卷：4
• 期：8
• 页码：1310-1314
• 全文大小：246K
• 年卷期：v.4,no.8(April 18, 2013)
• ISSN：1948-7185

文摘

Fuel interactions on solid oxide fuel cell (SOFC) anodes are studied with in situ Fourier transform infrared emission spectroscopy (FTIRES). SOFCs are operated at 800 掳C with CHb>4b> as a representative hydrocarbon fuel. IR signatures of gas-phase oxidation products, COb>2(g)b> and COb>(g)b>, are observed while cells are under load. A broad feature at 2295 cm^鈥? is assigned to COb>2b> adsorbed on Ni as a CHb>4b> oxidation intermediate during cell operation and while carbon deposits are electrochemically oxidized after CHb>4b> operation. Electrochemical control provides confirmation of the assignment of adsorbed COb>2b>. FTIRES has been demonstrated as a viable technique for the identification of fuel oxidation intermediates and products in working SOFCs, allowing for the elucidation of the mechanisms of fuel chemistry.<br>

Keywords:

solid oxide fuel cell; infrared spectroscopy; infrared emission; carbon dioxide; anode; methane