Limit cycle platinum catalyst

Cutlip, M. B., and C. N. Kenney, Limit cycle phenomena during catalytic oxidation reactions over a supported platinum catalyst, ACS Symp. Sen, 65, 475-486 (1978). 

Limit Cycle Phenomena during Catalytic Oxidation Reactions over a Supported Platinum Catalyst... 

Fuel supply is usually from liquid hydrogen or pressurized gaseous hydrogen. For other fuels, a fuel processor is needed, which includes a reformer, water gas shift reactors and purification reactors, in order to decrease the amount of CO to an acceptable level (below a few tens of ppm), which would otherwise poison the platinum-based catalysts. This equipment is still heavy and bulky and limits the dynamic response of the fuel cell stack, particularly for the electric vehicle in some urban driving cycles. 

Besides, the linear correlation between Vmax tnd precatalyst loading below 0.005 mol% would suggest a zero order in platinum. Obviously, this indicates the limits of our rudimentary analysis. Indeed, this method does not take into account the variation of catalyst concentration throughout the measures of Vmax- Additionally, platinum is not only involved in the hydrosilylation catalytic cycle, but also in the activation process and the deactivation pathways, definitely affecting its observed reaction order. Consequently, this approach is unable to determine Idnetic order in platinum. 

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