Possibilities of the Quantitative Comparison of Catalytic Capacity in Autocatalytic Processes of Palladium-Containing Nanocatalysts

Results And Discussions

The study of the catalytic properties of palladium-containing nanocatalysts in the reaction of low-temperature CO oxidation showed a clear presence of oscillations (Figure 1), when catalytically active structures are formed after exposure to the substrate for a certain time, i.e., a phenomenon called “training” of the catalyst is observed (Bol'shakov et al., 2001). Since according to J. Von Neumann (Von&Burks 1996) the ability to reproduce itself depends fundamentally on the complexity of the organization, and there is a well-defined critical level of complexity, starting from which it becomes self-sustaining or even can grow (Kureychik et al., 2007). In this case, the ability to train indicates a high probability of the formation of catalytic hypercycles (Gorovoy 2018) i.e., systems in which autocatalytic (i.e., self-reproducing) units are, in turn, interconnected through cyclic communication. Scientific interest in such processes is constantly growing, starting with the works of Prigogine, but despite this, there are practically no studies on the study of hypercycle structures for specific autocatalytic reactions.

It is reasonable to assume that one of the stumbling blocks is the lack of a developed methodology for the comparative study of “instantaneous” characteristics of autocatalytic processes, in particular, for processing measurement results (Mukhamediev et al., 2015).

Figure 1.

CO oxidation profile on freshly prepared carbon fiber catalysts with palladium-containing nanoparticles deposites and after exposure to a gas-air mixture (1% CO).