Self-Poisoning during BH4鈥?/sup> Oxidation at Pt and Au, and in Situ Poison Removal Procedures for BH4鈥?/sup> Fuel Cells

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• 作者：David A. Finkelstein ; Corey D. Letcher ; David J. Jones ; Lori M. Sandberg ; David J. Watts ; H茅ctor D. Abru帽a
• 刊名：The Journal of Physical Chemistry C
• 出版年：2013
• 出版时间：January 31, 2013
• 年：2013
• 卷：117
• 期：4
• 页码：1571-1581
• 全文大小：797K
• 年卷期：v.117,no.4(January 31, 2013)
• ISSN：1932-7455

文摘

Borohydride (BH₄^{鈥?/sup>) is rapidly attracting attention as an alternative fuel molecule for fuel cells due to its high gravimetric and volumetric energy densities, high power density, and avoidance of the carbon monoxide (CO) poisoning seen in hydrogen (H₂) and methanol (MeOH) fuel cells. Here we describe an as-yet unreported poisoning process that occurs during BH₄鈥?/sup> oxidation at Pt and Au anodes at low potentials (high fuel cell voltages). Though such poisoning can compromise the long-term performance of BH₄鈥?/sup> fuel cells, we also demonstrate an in situ cleaning procedure for a BH₄鈥?/sup> fuel cell using a Pt anode.}