Correction: I meant "NADPH" instead of "NADH". It's been 25 years since I've done any biochem, and obviously my skills have rusted (haha, electrochemistry joke).

The Z-scheme in photosynthesis is exactly the type of way I could see this being used: put a high energy electron into one state, and generate a cascade of subsequent chemical reactions as the electron relaxes into a lower energy state: https://en.wikipedia.org/wiki/Photosynthesis#Z_scheme