Journal ArticleDOI
Development and operation of a 150 W air-feed direct methanol fuel cell stack
D. Buttin,M. Dupont,M. Straumann,R. Gille,J.-C. Dubois,R. Ornelas,G. P. Fleba,E. Ramunni,Vincenzo Antonucci,Antonino S. Aricò,P. Cretì,E. Modica,M. Pham-Thi,J.-P. Ganne +13 more
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In this paper, a five-cell 150 W air-feed direct methanol fuel cell (DMFC) stack was demonstrated, which employed Nafion 117® as a solid polymer electrolyte membrane and high surface area carbon supported Pt-Ru and Pt catalysts.Abstract:
A five-cell 150 W air-feed direct methanol fuel cell (DMFC) stack was demonstrated. The DMFC cells employed Nafion 117® as a solid polymer electrolyte membrane and high surface area carbon supported Pt-Ru and Pt catalysts for methanol electrooxidation and oxygen reduction, respectively. Stainless steel-based stack housing and bipolar plates were utilized. Electrodes with a 225 cm2 geometrical area were manufactured by a doctor-blade technique. An average power density of about 140 mW cm−2 was obtained at 110 °C in the presence of 1 M methanol and 3 atm air feed. A small area graphite single cell (5 cm2) based on the same membrane electrode assembly (MEA) gave a power density of 180 mW cm−2 under similar operating conditions. This difference is ascribed to the larger internal resistance of the stack and to non-homogeneous reactant distribution. A small loss of performance was observed at high current densities after one month of discontinuous stack operation.read more
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International activities in DMFC R&D: status of technologies and potential applications
TL;DR: In this paper, a synopsis of the worldwide efforts resulting in inventions of a plethora of direct methanol fuel cells (DMFCs) with low, medium and high power capacities by a number of Companies, Research Institutions and Universities is presented.
Journal ArticleDOI
Direct methanol fuel cells: progress in cell performance and cathode research
TL;DR: In this article, the effect of variation of temperature on DMFC cathode potential was studied. But the authors focused on the long-term stability of the anode, and crossover of methanol.
Journal ArticleDOI
Direct ethanol fuel cells based on PtSn anodes: the effect of Sn content on the fuel cell performance
Weijiang Zhou,Shuqin Song,Wenzhen Li,Z.H. Zhou,Gongquan Sun,Qin Xin,S. Douvartzides,Panagiotis Tsiakaras +7 more
TL;DR: In this paper, several carbon supported PtSn catalysts with different Pt/Sn atomic ratios were synthesized and characterized by X-ray diffraction (XRD), Transmission electron microscopy (TEM) and Xray photoelectron spectroscopy (XPS).
Journal ArticleDOI
Electroreduction of dioxygen (ORR) in alkaline medium on Ag/C and Pt/C nanostructured catalysts—effect of the presence of methanol
TL;DR: In this paper, a colloidal route was used to obtain well dispersed catalysts on carbon, with a particle size close to 15nm, and the number of exchanged electrons for the ORR was found to be close to four with rotating disk electrode (RDE) as well as with rotating ring disc electrode (RRDE) techniques.
Journal ArticleDOI
Direct borohydride fuel cells
TL;DR: In this article, the recent, rapid progress in the development of direct borohydride fuel cells is reviewed Electrochemical reactions are considered together with the importance of operating parameters on cell performance.
References
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Journal ArticleDOI
Methanol oxidation and direct methanol fuel cells: a selective review
S. Wasmus,A. Küver +1 more
TL;DR: A status report on development of the direct methanol fuel cell (DMFC) and relevant fundamental and applied electrochemistry is the objective of as discussed by the authors, where emphasis is put on strategies and approaches rather than on individual results.
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Fuel cells and their applications
TL;DR: The importance of fuel cells for energy saving is explained and evaluated and the extremely low pollution characteristics of dispersed fuel cells are emphasised in this article, where their wide-ranging applications in homes, small factories and power plants, and in some industries for the highly efficient conversion of waste and biomass materials, with the general effect of carbon dioxide reduction in all fossil-fuel-burning processes, are discussed.
Journal ArticleDOI
Electrocatalysis by ad-atoms: Part III. Enhancement of the oxidation of carbon monoxide on platinum by ruthenium ad-atoms
Masahiro Watanabe,Satoshi Motoo +1 more
TL;DR: In this paper, the authors found that carbon monoxide oxidation on platinum by ruthenium ad-atoms was found to take place in two θ Ru regions; one by the increase of ( n Pt−Ru ) av and another by an increase of n Ru−Ru av, as expected from the standpoint of the bi-functional theory proposed by the authors.
Journal ArticleDOI
High performance direct methanol polymer electrolyte fuel cells
TL;DR: In this article, a decal transfer method was used to apply thin-film catalyst/ionomer composite layers to Nation® membranes and achieved a maximum power density of 250 mW/cm2.
Journal ArticleDOI
Binary and ternary anode catalyst formulations including the elements W, Sn and Mo for PEMFCs operated on methanol or reformate gas
Michael Götz,Hartmut Wendt +1 more
TL;DR: In this paper, a colloid method was used to synthesize polymetallic PEM catalysts for anodic anodic oxidation of H2 containing 150ppm CO and of methanol.