Heterogeneous, homogeneous, and enzymatic catalysis: three branches of the same scientific chapter. Introductory remarks to the “Concepts in catalysis” issue

This contribution has a fully introductive character to the issue content. It describes how the idea to connect heterogeneous, homogeneous, and enzymatic catalysis contributions took origin from a meeting of the Accademia Nazionale dei Lincei organized in Rome in 2016. In the first part of the article, the general motivations of the initiative and of the present issue entitled “Concepts in catalysis” are described. In the second part, a brief comment on the 20 contributions of this issue and on their organization is reported.