Platinum/diamond composite

Another important function of metallic coatings is to provide wear resistance. Hard chromium, electroless nickel, composites of nickel and diamond, or diffusion or vapor-phase deposits of sUicon carbide [409-21-2], SiC , SiC tungsten carbide [56780-56-4], WC and boron carbide [12069-32-8], B4C, are examples. Chemical resistance at high temperatures is provided by aUoys of aluminum and platinum [7440-06-4] or other precious metals (10—14). 

A nonactive electrode may include noble metals such as gold, silver, and platinum, the so-called sp-metals such as In, Ga, Cd, Bi, as well as transition (or d) metals such as nickel or cobalt. Carbon electrodes and semiconductors such as indium tin oxide [1], diamond [2], and conducting polymers may fall into the category of nonactive electrodes in appropriate solutions, as do composite materials that contain metal oxides or chalcogenides. The behavior of active electrodes in nonaqueous solution is discussed separately in the next chapter. 

The selective adhesion of mineral particles to a tacky base has been used to recover particles of diamond, gold, and platinum [329]. For these particles the adhesion process includes contact with a tacky surface and penetration of the particles into the oily layer. Mineral oils with added thickening agents can be used as the tacky composition. 

The OCPs for the Pt/diamond composite electrodes with varying platinum loadings were measured in nitrogen-saturated methanol -1-0.1... 

Wang J, Swain GM. Fabrication and evaluation of platinum/diamond composite electrodes for electrocatalysis. J Electrochem Soc 2003 150 E24-32. 

Mitani, T. and K. Mitsuda. 2009. Durability of graphite composite bipolar plates. In Ro/ymer /ecfro/yfeEtte/ Cell Durability, eds. F.N. Buchi, M. Inaba, and T.J. Schmidt, pp. 257-268. New York, NY Springer. Montilla, F., E. Morallon, I. Duo et al. 2003. Platinum particles deposited on synthetic boron-doped diamond surfaces. Application to methanol oxidation. Electrochimica Acta 48 3891-3897. 

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