Peroxide is stable as long as it's kept at a low concentration (dilluted) or kept in very clean containers. I wonder how difficult it would be to store it in a safe dilluted condition, then "distill" (or some other process) out the excess water, leaving high concentration peroxide that would be immediately used. Obviously, the water wouldn't be wasted and the high purity peroxide wouldn't be stored.

I think demand oriented generation might be the way to go with hydrogen production, too. Whether by electrolysis or from hydrocarbons or alcohols, you'd only generate the hydrogen as it's needed at the point of consumption. That would do away with the need to develop a massive infrastructure to generate, transport, and store hydrogen.