Synthesis and characterization of catalyst layers for direct methanol fuel cell applications

Nonenzymatic free-cholesterol detection via a modified highly sensitive macroporous gold electrode with platinum nanoparticles

“…The Pt or Pt-based nanoparticles are still indispensable and are shown to be the most effective option for the enhancement of electrocatalytic activity at present. The electrocatalytic activity of the Pt particles is dependent on many factors, such as particle size and dispersion (Katsuaki et al, 1990), preparation methods (Loffler et al, 2001), and the supporting materials (Gloaguen et al, 1997). Furthermore, the activity of the catalyst is strongly dependent on the structure of the supporting materials (Yu et al, 2002).…”

Electrochemical Synthesis of Core–Shell Catalysts for Electrocatalytic Applications

“…However, for the preparation of electrocatalysts, alternative methods can be envisaged, which include the electrochemical deposition of active material on a conducting support. [2][3][4][5] The advantage of this approach is that material is only deposited at sites which are electrically connected, and thus no costly material is deposited on "dead" parts of the electrode. It was recently shown that highly viscous additives to the electrolyte solution lead to a restricted diffusion of metal ions that prevents particle growth during electrodeposition and allows the preparation of Pt nanoparticles as small as 2-3 nm.…”

Platinum-Ruthenium Catalysts, Manufactured by Means of Ion Exchange in Nafion Layers

“…Below we will describe our attempts to replace the complex salt by the salt Ru(OH)Cl 3 , which is simpler and more readily available commercially. 6 ]Br 3 (10 mM each) was varied from 50 to 90 at. % Pt.…”

“…New synthetic methods for the preparation of the established catalytic systems (Pt-Ru, Pt-Mo, Pt-W, Pt-Ni), which would improve characteristics of DMFC, are under development [5]. The authors of [6] suggested a method for producing a catalytic layer, which is based on pulsed electrochemical deposition. They incorporated a platinum precursor in a carbonaceous carrier that had been mixed with Nafion and subjected it to an in situ reduction.…”