Affiliation:
1. Materials for Energy Conversion and Storage (MECS) Chemical Engineering Department Faculty of Applied Sciences Delft University of Technology Van der Maasweg 9 2629 HZ Delft The Netherlands
Abstract
AbstractAmmonia is an indispensable commodity and a potential carbon free energy carrier. The use of H permeable electrodes to synthesize ammonia from N2, water and electricity, provides a promising alternative to the fossil fuel based Haber‐Bosch process. Here, H permeable Ni electrodes are investigated in the operating temperature range 25–120 °C, and varying the rate of electrochemical atomic hydrogen permeation. At 120 °C, a steady reaction is achieved for over 12 h with 10 times higher cumulative NH3 production and almost 40‐fold increase in faradaic efficiency compared to room temperature experiments. NH3 is formed with a cell potential of 1.4 V, corresponding to a minimum electrical energy investment of 6.6 kWh kg−1
. The stable operation is attributed to a balanced control over the population of N, NHx and H species at the catalyst surface. These findings extend the understanding on the mechanisms involved in the nitrogen reduction reaction and may facilitate the development of an efficient green ammonia synthesis process.
Subject
General Energy,General Materials Science,General Chemical Engineering,Environmental Chemistry
Cited by
3 articles.
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