Althea Draper Nov 17, 2020:

The source looks to be from one of the Mitsubishi air purifiers (possibly a MA-E85R seen here https://static.eseficiencia.es/media/2020/11/20201103-mitsub...

The technology is described in one of their American websites (https://www.mitsubishicomfort.com/articles/air-quality/filte... as "Platinum Deodorizing filters, which also cleanse the air of unpleasant odors, are found in premium units. These filters absorb foul smells through the use of a platinum catalyst. They use nanotechnology, which makes them incredibly efficient at absorbing odor at the molecular level. A nanometer-scale mesh platinum catalyst deodorizing filter catches and absorbs even the tiniest particulate matter in the air. "
(I always thought that a heterogeneous catalyst adsorbed rather than absorbed the gas molecules.) It seems that, in this case, the catalyst just traps the molecules of formaldehyde etc. on the platinum surface. Nanometer scale just means there is more surface area to 'catch' the molecules making the process more effective, and I'm pretty sure all catalysts operate at a molecular level! Marketing at its best/worst?

Michele Fauble Nov 17, 2020:

Filter A filter consists of filter material, in this case the particles, although a filter may also consist of more than one filter material.

psicutrinius Nov 17, 2020:

"cerámica de platino...." Not really. Might be platinum clad ceramic filters... but no "cerámica de platino" (which means "platinum made ceramics" which does not (and cannot) exist. A "florid" original, I am afraid...