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Direct formic acid fuel cell

Effects of Catalyst Loading and Oxidant on the Performance of Direct Formic Acid Fuel Cells... [Pg.589]

Rice C, Ha RI, Masel RI, Waszczuk P, Wieckowski A, Barnard T. 2002. Direct formic acid fuel cells. J Power Sources 111 83-89. [Pg.407]

There are several types of direct liquid fuel cells, such as direct methanol fuel cells (DMFCs), direct formic acid fuel cells (DFAFCs), and direct ethanol fuel cells (DEFCs), the most popular being the DMFC, which is the focus of this section. A schematic DMFC system is shown in Figure 1.7. [Pg.9]

DFAFC Direct formic acid fuel cell... [Pg.431]

Ha, S., Adams, B., Masel, R. (2004). A miniature air breathing direct formic acid fuel cell. /. Power Sources 128,119-124. [Pg.416]

Rice, C., Ha, S., Masel, R.L, and Wieckowski, A. 2003. Catalysts for direct formic acid fuel cells. Journal of Power Sources 115, 229-235. [Pg.297]

S. Ha, Z. Dunbar, and R.I. Masel, Characterization of a high performing passive direct formic acid fuel cell. Journal of Power Sources, 158(1) (2006) 129-136. [Pg.143]

Direct Formic Acid Fuel Cell (DFAFC)... [Pg.185]

Formic acid is used in membrane-type fuel cells as an aqueous solution. A 20 M HCOOH solution contains about 75% of formic acid. Owing to the low water content, the membrane is not sufficiently moistened in such a concentrated solution, and its resistance increases. In solutions with concentrations less than 5 M, the current densities that can be realized are low because of slow reactant supply by diffusion to the catalyst surface. An optimum concentration for fuel cell operation is 10-15 M. In contrast to direct methanol fuel cells, an increase in reactant concentration for direct formic acid fuel cells does not produce complications related to reactant crossover. [Pg.186]

In direct formic acid fuel cell, at a temperature of 70 C and a working voltage of 0.4 V, a power density of about 50mW/cm was attained in 12M formic acid. For comparison, the power density in a typical methanol fuel cell under the same conditions is about 30 mW/cm. ... [Pg.186]

Rao, C. V., Cabrera, C. R, and Ishikawa, Y. (2011). Graphene-Supported Pt-Au Alloy Nanoparticles A highly efficient anode for direct formic acid fuel cells./ Phys. Chem. C, 44, pp. 21963-21970. [Pg.320]

Haan JL, Stafford KM, Masel RI (2010) Effects of the addition of antimony, tin, and lead to palladium catalyst formulations for the direct formic acid fuel cell. J Phys Chem C 114 11665-11672... [Pg.61]

Lee JK, Lee J, Han J, Lim TH, Sung YE, Tak Y. Influence of Au contents of AuPt anode catalyst on the performance of direct formic acid fuel cell. [Pg.129]

Abstract Direct liquid fuel cells for portable electronic devices are plagued by poor efficiency due to high overpotentials and accumulation of intermediates on the electrocatalyst surface. Direct formic acid fuel cells have a potential to maintain low overpotentials if the electrocatalyst is tailored to promote the direct electrooxidation pathway. Through the understanding of the structural and environmental impacts on preferential selection of the more active formic acid electrooxidation pathway, a higher performing and more stable electrocatalyst is sought. This chapter overviews the formic acid electrooxidation pathways, enhancement mechanisms, and fundamental electrochemical mechanistic studies. [Pg.43]

Law WL, Platt AM, Wimalaratne PDC, Blair SL (2009) Effect of organic impurities on the performance of direct formic acid fuel cells. J Electrochem Soc 156 B553-B557... [Pg.62]

Chen W, Tang Y, Bao J, Gao Y, Liu C, Xing W, Lu T (2007) Study of cartxui-supported Au catalyst as the cathodic catalyst in a direct formic acid fuel cell prepared using a polyvinyl alcohol protectirai method. J Powct Sources 167 315—318... [Pg.63]

Jung WS, Han J, Ha S (2007) Analysis of palladium-based anode electrode using electrochemical impedance spectra in direct formic acid fuel cells. J Power Sources 173 53-59... [Pg.64]

Yu X, Pickup PG (2011) Carbon supprated PtBi catalysts for direct formic acid fuel cells. Electrochim Acta 56 4037-4043... [Pg.65]

Uhm S, Qmng ST, Lee J (2008) Characterization of direct formic acid fuel cells by impedance studies in comparison of direct methanol fuel cells. J Power Sources 178 34-43... [Pg.65]

Kang Y, Ren M, Yuan T, Qiao Y, Zou Z, Yang H (2010) Effect of Nafion aggregation in the anode catalytic layCT on the ptafonnance of a direct formic acid fuel cell. J Power Sources 195 2649-2652... [Pg.66]

Kang S, Lee J, Lee IK, Chung S-Y, Tak Y (2006) Influence of Bi modification of pt anode catalyst in direct formic acid fuel cells. J Phys Chcm B 110 7270-7274... [Pg.66]

Abstract Direct formic acid fuel cells offer an alternative power source for portable power devices. They are currently limited by unsustainable anode catalyst activity, due to accumulation of reaction intermediate surface poisons. Advanced electrocatalysts are sought to exclusively promote the direct dehydrogenation pathway. Combination and structure of bimetallic catalysts have been found to enhance the direct pathway by either an electronic or steric mechanism that promotes formic acid adsorption to the catalyst surface in the CH-down orientation. Catalyst supports have been shown to favorably impact activity through either enhanced dispersion, electronic, or atomic structure effects. [Pg.69]

Fundamental anode catalyst research is imperative for improved direct formic acid fuel cell (DFAFC) performance and stability such that an intimate understanding of the interplay between structural, morphological, and physicochemical properties is needed. The primary base catalysts found to be active for formic acid electrooxidation are either platinum (Pt) or palladium (Pd). The cyclic voltammograms in Fig. 4.1 compare the activity of carbon-supported Pt to Pd towards formic acid electrooxidation. The anodic (forward) scan, relevant to DFAFC performance, is relatively inactive on Pt/C until the applied potential... [Pg.69]

Fig. 4.2 Plot of direct formic acid fuel cell performance at 0.6 V for Pt/C anodes as a function of Pb and Sb adatom coverages. The experimental data is compared to the two formic acid electrooxidation models proposed by Leiva (solid line) electronic enhancement and (dashed line) third-body effect [29]... Fig. 4.2 Plot of direct formic acid fuel cell performance at 0.6 V for Pt/C anodes as a function of Pb and Sb adatom coverages. The experimental data is compared to the two formic acid electrooxidation models proposed by Leiva (solid line) electronic enhancement and (dashed line) third-body effect [29]...
Uhm S, Chung ST, Lee J (2007) Activity of Pt anode catalyst modified by underpotential deposited Pb in a direct formic acid fuel cell. Electrochem Commun 9 2027-2031... [Pg.84]

Feng L-G, Yan L, Cui Z-M, Liu C-P, Xing W (2011) High activity of Pd-W03/C catalyst as anodic catalyst for direct formic acid fuel cell. J Power Sources 196 2469-2474... [Pg.88]

See other pages where Direct formic acid fuel cell is mentioned: [Pg.411]    [Pg.451]    [Pg.392]    [Pg.305]    [Pg.44]    [Pg.64]   
See also in sourсe #XX -- [ Pg.8 ]

See also in sourсe #XX -- [ Pg.51 , Pg.185 ]



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