From the book Freeze Drying by Georg-Wilhelm Oetjen:
Oesterle showed that not only can tBA speed up the sublimation of ice from
amorphous freeze-concentrated mixtures, but also similar effects can be achieved
with volatile ammonium salts such as ammonium acetate, bicarbonate and formate.
In other words, a scientist showed via experimentation that tBA (also known as tetrabutylammonium hydroxide, which is a type of ammonium salt) and other ammonium salts can speed up the sublimation of ice.
Here is some more information on ammonium salts, and here is some more information on tBA.
So, yes, certain salts can speed up the sublimation of ice.
I am unable to access Oesterle's full paper, but here is a link to its abstract (the paper was entitled The influence of tertiary butyl alcohol and volatile salts on the sublimation of ice from frozen sucrose solutions: implications for freeze-drying).
Here is a link to a pdf of the book Freeze Drying; the quote above is from page 87.
(I assume you met sublimation as in the first sentence of your question it says "water ice will, over time, sublimate to vapor.")
Doing some further research, I've found salts that slow down the sublimation of ice (such as NaCl). What I'm finding is that it depends on the salt.
While I'm not sure, I believe I found a sort-of explanation of why salt sometimes affects sublimation - according to a chemistry.SE question (here):
In wood, most or all of the bonds between the individual atoms and fibre units are covalent; making them very strong...In ice, on the other hand, the units of the crystal is held together with comparatively weak hydrogen bonds, meaning that not a lot of energy is required for a surface molecule of water to escape...
In other words, perhaps salts of different kinds do one of the following:
- Don't do anything
- Weaken the bonds between the atoms, therefore speeding up sublimation
- Strengthen the bonds between the atoms, therefore slowing sublimation
From my research, I think that NaCl is one of the third type and ammonium salts like ammonium acetate are of the second type.
Please note that this explanation of the phenomenon is mostly speculation based on what I've found. It is mostly to show where I'm headed in my research on this topic.
Hope this helps!