5.2.2-7 May a professor make a collection of particular articles, e-books, etc. (digital reserve list) available to his students on his homepage?

Yes, as long as he limits the access to the digital reserve list to his students in the case of the use of third-party works (password) and takes the scope of the work into consideration, depending on the type of work. The professor may make his own works freely available as long as he has not given up the rights to them.