1. For example, consider the Haber process for the synthesis of ammonia (NH3): N2 + 3 H2 ⇌ 2 NH3 In the above reaction, iron (Fe) and molybdenum (Mo) will function as catalysts if present.

2. Abiological nitrogen fixation describes chemical processes that fix (react with) N 2, usually with the goal of generating ammonia.The dominant technology for Abiological nitrogen fixation is the Haber process, which uses an iron-based heterogeneous catalysts and H 2 to convert N 2 to NH 3.This article focuses on homogeneous (soluble) catalysts for the same or similar conversions.