Heterogeneous catalysis general formulation

The purpose of the present Section is twofold first to draw attention to the problems and ambiguities which have arisen in connection with the reporting of gas adsorption (physisorption) data and second to formulate proposals for the standardization of procedures and terminology which will lead to a generally accepted code of practice. It does not aim to provide detailed operational instructions or to give a comprehensive account of the theoretical aspects of physisorption. The determination of the surface area of supported metals is not dealt with here - despite the importance of this topic in the context of heterogeneous catalysis - since this necessarily involves chemisorption processes. 

Ammonia synthesis catalyst with Fes04 as precursor has been studied widely and deeply in the past one century. " These results have greatly promoted the development of heterogeneous catalysis and surface science. Ammonia synthesis reaction is a green chemical reaction without side reaction and with molecular efficiency and selectivity of 100%. It is used as the ideal model reaction in heterogeneous catalysis, and all general concepts of catalysis were developed and formulated in relation to ammonia synthesis. So ammonia synthesis catalyst is also called textbook catalyst. ... 

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