Carbon electrocatalytic properties

Reduction of Carbon Dioxide Electrocatalytic Properties of Carbon 19... 

Electrocatalytic Properties of Carbon Materials Tarasevich, M. R. Khrushcheva, E. I. 19... 

A. Salimi, E. Sharifi, A. Noorbakhsh, and S. Soltanian. Direct voltammetry and electrocatalytic properties of haemoglobin immobilized on a glassy carbon electrode modified with nickel oxide nanoparticles. Electrochem. Commun. 8, 1499-1508 (2005). 

He, Z., et ah, Electrodeposition ofPt-Ru nanoparticles on carbon nanotubes and their electrocatalytic properties for methanol electrooxidation. Diamond and Related Materials, 2004.13(10) p.1764-1770. 

It is well known that catalyst support plays an important role in the performance of the catalyst and the catalyst layer. The use of high surface area carbon materials, such as activated carbon, carbon nanofibres, and carbon nanotubes, as new electrode materials has received significant attention from fuel cell researchers. In particular, single-walled carbon nanotubes (SWCNTs) have unique electrical and electronic properties, wide electrochemical stability windows, and high surface areas. Using SWCNTs as support materials is expected to improve catalyst layer conductivity and charge transfer at the electrode surface for fuel cell oxidation and reduction reactions. Furthermore, these carbon nanotubes (CNTs) could also enhance electrocatalytic properties and reduce the necessary amount of precious metal catalysts, such as platinum. 

The effects of pyrolysis on the electrocatalytic properties of the same three macrocycles dispersed in Vulcan XC-72 for 02 reduction were examined using thin porous electrodes applied to the carbon disk of an RRD E as sembly. Steady state polarization curves obtained at co = 2500 rpminO.l M NaOH and 0.05 M H2S04are shown in Figures 3.70 and 3.71. As is evident from the results presented therein, the activity of H2TMPP in both media (see solid squares) before and after pyrolysis was much lower than that of the metallated counterparts and fairly close to that of... 

Here, we give an example where the electrochemical and electrocatalytic properties of nanostructured Pt catalysts supported on glassy carbon, prepared with colloidal lithography, were tested with oxidation of preadsorbed CO, so-called CO-stripping, as a test reaction [99]. The Pt nanoparticles were prepared as described in Fig. 4.11, except that the polystyrene particles were removed by UV-ozone treatment. The particles had an average diameter of 122 11 nm and were about 40 nm high. There was no indication (by AFM... 

Zhao, K., Song, H., Zhuang, S., Dai, L., He, P., and Fang, Y. 2007. Determination of nitrite with the electrocatalytic property to the oxidation of nitrite on thionine modified aligned carbon nanotubes. Electrochemistry Communications 9, 65-70. 

The electrochemical and electrocatalytic properties of carbon electrodes can be modified changing their surface composition by anchoring foreign compounds. This can be accomplished by adsorption, by chemical reaction with a surface group, by specific chemical binding, and by adsorption immobilization on a sublayer of a polymer material [40]. Chemically modified electrodes constitute a part of supramolecular chemistry. 

Tarasevich, M.R. and Khrushcheva, E.l. (1989). Electrocatalytic Properties of Carbon Materials, Modern Aspects of Electrochemistry, Vol. 19. Plenum Press, p. 295. 

Oxygen Electrocatalytic Properties Oxygen Reduction. Figure 8 compares steady-state polarization curves for the electroreduction of Op on a typical pyrochlore catalyst, Pb2(Rui.42Pbo.53)06.5 15 w/o platinum on carbon. The latter was considered representative of conventional supported noble metal electrocatalysts. The activities of both catalysts are quite comparable. While the electrodes were not further optimized, their performance was close to the state of the art, considering that currents of 1000 ma/cm could be recorded, at a relatively moderate temperature (75 C) and alkali concentration (3M KOH). Also, the voltages were not corrected for electrolyte resistance. The particle size of the platinum on the carbon support was of the order of 2 nanometers, as measured by transmission electron microscopy. 

It is perhaps fitting to conclude this review with an ashes to ashes, dust to dust illustration of the use of alkyne-metal complexes in materials science. For this we cite the recent production of nanoscale platinum clusters in glassy (sp ) carbon with unusual electrocatalytic properties by pyrolysis (600 °C) of (Ph3)2Pt-complexed poly(phenylenediacetylene) (125) (Scheme 4-68) [233]. 

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