Impedance of vapor feed direct methanol fuel cells—polarization dependence of elementary processes at the anode

Passive direct methanol fuel cells fed with methanol vapor

“…use natural convection or capillary forces to supply air or liquid methanol fuel instead of using active components such as pumps or compressors, which led to reduction in noise. In the work of Fukunaga et al, vapor fed DMFCs have been suggested because of higher activities and the usage of highly concentrated fuel [4][5][6]. However, in their work, the water and methanol were vaporized and supplied with a carrier gas at high temperature, and then the active components for vapor supply cannot exclude the size problem of DMFCs.…”

Impedance studies and modeling of direct methanol fuel cell anode with interface and porous structure perspectives

“…In studies of reaction kinetics of a DMFC, electrochemical impedance spectroscopy (EIS) is commonly employed [1][2][3][4]. Mueller and Urban [5] characterized DMFC processes using ac impedance spectroscopy and identified three arcs on a typical Nyquist plot.…”

Kinetics of CH3OH oxidation on PtRu/C studied by impedance and CO stripping voltammetry

“…In particular, for understanding reactions with different reaction rates, it is important that the kinetics 3/27 JMF04091 Revised W. Sugimoto et al of the oxidation of CH 3 OH is characterized. Electrochemical impedance spectroscopy is a powerful method to probe the kinetics of electrochemical reactions and has recently been utilized to understand the anodic processes for CH 3 OH oxidation [68][69][70][71][72][73][74][75]. Using a membrane electrode assembly (MEA) with H 2 passed on the cathode side (instead of O 2 in DMFC) to act as the counter and reference electrode,…”