直接甲醇燃料电池
漫反射
红外线的
傅里叶变换红外光谱
阴极
傅里叶变换
原位
材料科学
阳极
反射(计算机编程)
傅里叶变换光谱学
漫反射红外傅里叶变换
分析化学(期刊)
甲醇
红外光谱学
光谱学
化学
光学
电极
物理
物理化学
催化作用
有机化学
生物化学
量子力学
光催化
色谱法
计算机科学
程序设计语言
作者
Qinbai Fan,Cong Pu,Eugene S. Smotkin
出处
期刊:Journal of The Electrochemical Society
[The Electrochemical Society]
日期:1996-10-01
卷期号:143 (10): 3053-3057
被引量:68
摘要
In situ Fourier transform infrared-diffuse reflection spectroscopy (FTIR-DRS) was used to study both the adsorbed and desorbed species produced on high surface area anodes and cathodes of direct methanol/oxygen fuel cells. The authors investigated platinum-ruthenium and platinum black as anodes. The cathodes studied were platinum black. The primary product detected on both Pt-black and Pt-Ru anodes at low methanol/water vapor ratios (P{sub methanol}: 15.2 kPa) was CO{sub 2}. Consistent with previous work, CO adsorption is more prevalent on Pt-black than on Pt-RU. In addition to CO and CO{sub 2}, vibrational modes due to formic acid, methylformate, and formaldehyde are detected by FTIR-DRS under potentiostatic control. At higher methanol/water vapor ratios (P{sub methanol}: 38.0 kPa) and low potentials (0.10 to 0.50 V), formaldehyde is the only product at the Pt-Ru anode. Methylformate and formic acid vibrational modes appear at potentials from 0.60 to 0.80 V. CO{sub 2} and methanol are observed at open circuit on the cathode side as a result of methanol permeation from the anode to the cathode region. CO{sub 2} increases in the cathode region with increasing anode potential.
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