I agree, that looking - though very carefully! - into hydrogen peroxide could be a good approach. However, "hypergolic monopropellant" is like clapping with one

I agree, that looking - though very carefully! - into hydrogen peroxide could be a good approach. However, "hypergolic monopropellant" is like clapping with one hand. "Hypergolic" means "self-igniting by the contact with the other component", it's a property of a component of a pair, not of a single substance. For example (see J. Clark, Ignition!) nitric acid is hypergolic with turpentine, but not hypergolic with kerosene.