Catalytic and electrocatalytic synthesis of NH3 in a H+ conducting cell by using an industrial Fe catalyst

The catalytic and electrocatalytic synthesis of ammonia was studied in double-chamber and single-chamber proton conducting cells at 450700 degrees C and at atmospheric total pressure. A Fe-based industrial catalyst was used as the working electrode. The kinetics of the catalytic reaction of ammonia synthesis were evaluated under open-circuit. An up to 80% increase in the reaction rate was observed when protons were electrochemically "pumped" to the Fe electrode. A weak NEMCA effect was observed with the Faradaic efficiency (Lambda) and the reaction rate enhancement (rho) remaining below 3.0 and 2.0, respectively. (c) 2006 Elsevier B.V. All rights reserved.