Direct formic acid fuel cell DFAFC

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. 

Direct Formic Acid Fuel Cell (DFAFC)... 

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... 

Yu X, Pickup PG (2008) Recent advances in direct formic acid fuel cells (DFAFC). J Power... 

When formic acid is oxidized directly at the anode as the fuel, the fuel cell is called a direct formic acid fuel cell (DFAFC). The anode, the cathode, and the overall reactions are expressed by Reactions 1.7,1.8, and 1.9, respectively. Since the formic acid oxidation does not require water, highly concentrated formic acid can be used. 

Pt(lll) [5-7]. The studies on preferentially oriented Pt nanoparticles also suggest the same trends as observed oti single ciystals [8]. In the real catalysts, Pt polycrystals inevitably bring the poisoning problem. For this reason, existing Pt-based electrocatalysts can accomplish FA oxidation only at extremely positive potentials (i.e., at potentials without technological interest). Therefore, the development of direct formic acid fuel cells (DFAFCs) has been impeded by the... 

Methanol and some other liquid foels can be fed to a PEM fuel cell directly without being reformed, thus forming a direct methanol fuel cell (DMFC), direct ethanol fuel cell (DEFC), direct formic acid fuel cell (DFAFC), and so on. 

Hong et al. (2011) designed and investigated a miniature air-breathing direct formic acid fuel cell (DFAFC)-based four-cell stack with a gold-coated PCB as the end plate and current collector. The most important difference in the proposed cell configuration compared with constructions reported in the literature is the existence of independent cavities as fuel reservoirs for each cell. The merit of this particular design is the avoidance of water hydrolysis between electrodes, which is inevitable in stacks built with a shared fuel tank. With a 5.0 M formic acid solution in this four-cell stack, a maximum power density of 55.6 mW/cm was achieved. 

DFAFC Direct formic acid fuel cell... 

Direct Formic Acid Microfuei Ceii (DFAFC) Microfuel cell with direct formic acid as fuel can use nanoporous silicon membrane [140]. The... 

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