This project demonstrates diamond-based photochemistry using visible light. Diamond has the unique property of having a widely tunable electrochemical surface, with hydrogen terminated diamond known to have a negative electron affinity. This property enables the emission of electrons from the surface of the diamond. In this work, electrons are emitted into an aqueous solution, creating a reservoir of free, solvated electrons, that can be used to initiate energy intensive chemical reactions. We demonstrate that visible light incident on thin films of diamond on molybdenum substrates can be used to reduce nitrogen gas to ammonia via the photogenerated electrons.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Mechanical Engineering
- Materials Chemistry
- Electrical and Electronic Engineering