This isn't my field but I stumbled on it while googling for something else. It appears to show that you can speed up the loading and unloading of hydrogen into Palladium by using magnets. This isn't something I've seen discussed here. Sorry if Ive missunderstood or it's a well known effect.
Magnetic effects of hydride storage in Palladium - Jessica Jewett Reed - University of Iowa.
Hope that link works ok.