I've followed LENR for a good half decade now, which isn't as long as many of you... that being said, this is the best place to propose this and hope for constructive critique or possibly to be told that it just isn't feasible (in which case I sincerely apologize for wasting your time)
As Bob Greenyer emphatically warned the community, experiment with stibine is incredibly dangerous. However, maybe there is a way to confine it or similarly reduce risk that wouldn't require a remote lab and other expenses.
The idea is to use hydrogen spillover on a supported nickel catalyst.
Spillover requires a catalyst capable of dissociating hydrogen gas, and a support capable of hydrogen transport. Nickel fulfills the first requirement.
Im not sure if Aluminium Antimonide (semiconductor) can fulfill the second requirement. If it does, nickel can be chemisorbed on the surface, hydrogen gas will disassociate and be adsorbed on the nickel catalyst and then interact with the Sb-3 to form stibine. Not sure if the rate of stibine formation could be controlled using semiconductor properties.
Another method, if AlSb fails, would be to use a zeolite. First take Antimony Trichloride dissolved in water, soak the zeolite for some time, evaporate/desiccate. Heat under a reducing atmosphere. Then follow the same procedure as above, the spillover hydrogen will flow along the surface of the zeolite and interact with the contained antimony.
Beside spillover hydrogen, there is another effect of supported catalysts called "strong metal-support interactions" that originally was studied using TiO. The TiO migrates onto the catalyst and can either be beneficial or not to the intended reaction. Lower oxidation states for the support are associated with the effect. The support is theorized to move up through the grains of the catalyst. Introducing hydrogen to the nickel catalysts may lead to dissociation and subsequent interaction with the migrated support.
Thanks for reading and any comments are appreciated.