@axil: could you please indicate where iridium is being mentioned in the context of these iron oxide catalysts? As fas as I'm aware of, the inert binder/support is usually composed of one or more oxides of chromium, aluminium or silicon. Iridium-based dehydrogenation catalysts do exist in commerce, but iridium replaces the iron oxide there. According to Holmlid the reaction can take place with different dehydrogenation catalysts. See paragraph 11 here in his patent application:
https://www.google.com/patents/EP2680271A1
Quote[0011] A "hydrogen transfer catalyst" is any catalyst capable of absorbing hydrogen gas molecules (H2) and dissociating these molecules to atomic hydrogen, that is, catalyze the reaction H2 → 2H. The name hydrogen transfer catalyst implies that the so-formed hydrogen atoms on the catalyst surface can rather easily attach to other molecules on the surface and thus be transferred from one molecule to another. The hydrogen transfer catalyst may further be configured to cause a transition of the hydrogen into the ultradense state if the hydrogen atoms are prevented from re-forming covalent bonds. The mechanisms behind the catalytic transition from the gaseous state to the ultra-dense state are quite well understood, and it has been experimentally shown that this transition can be achieved using various hydrogen transfer catalysts, including, for example, commercially available so-called styrene catalysts, as well as (purely) metallic catalysts, such as Iridium and Palladium. It should be noted that the hydrogen transfer catalyst does not necessarily have to transition the hydrogen in the gaseous state to the ultra-dense state directly upon contact with the hydrogen transfer catalyst. Instead, the hydrogen in the gaseous state may first be caused to transition to a dense state H(1), to later spontaneously transition to the ultra-dense state H(-1). Also in this latter case has the hydrogen transfer catalyst caused the hydrogen to transition from the gaseous state to the ultra-dense state.