Coupled Dynamics of Anode and Cathode in Proton-Exchange Membrane Fuel Cells

被引：13

作者：

Nogueira, Jessica A. ^{[1
]}

Krischer, Katharina ^{[2
]}

Varela, Hamilton ^{[1
]}

机构：

[1] Univ Sao Paulo, Inst Chem Sao Carlos, POB 780, BR-13560970 Sao Carlos, SP, Brazil

[2] Tech Univ Munich, Dept Phys, James Franck Str 1, D-85748 Garching, Germany

来源：

CHEMPHYSCHEM | 2019年 / 20卷 / 22期

基金：

巴西圣保罗研究基金会;

关键词：

formic acid; fuel cells; methanol; oscillations; reference electrodes; FORMIC-ACID; REFERENCE ELECTRODE; METHANOL CROSSOVER; OSCILLATIONS; OXIDATION; ELECTROOXIDATION; HYDROGEN; TEMPERATURE; VALIDATION; EFFICIENCY;

D O I：

10.1002/cphc.201900531

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

An external reference electrode was used to monitor individually the evolution of the anodic and cathodic potentials during the stationary as well as oscillatory operation of a Direct Formic Acid Fuel Cell (DFAFC) and a Direct Methanol Fuel Cell (DMFC). Besides evidencing the large activation loss in both cells, we were able to observe how the oscillatory operation of such devices affects their cathodes. In fact, cathodic oscillations synchronized with the cell voltage dynamics were observed, hitherto never reported on fuel cells. We have addressed these phenomena taking into account two main coupling processes: through the proton concentration and a global coupling stemming from the control mode (potentiostatic or galvanostatic).

引用

页码：3081 / 3088

页数：8

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