Details

Autor(en) / Beteiligte

• Manabe, R
• Nakatsubo, H
• Gondo, A
• Murakami, K
• Ogo, S
• Tsuneki, H
• Ikeda, M
• Ishikawa, A
• Nakai, H
• Sekine, Y

Titel

Electrocatalytic synthesis of ammonia by surface proton hopping

Ist Teil von

• Chemical science (Cambridge), 2017, Vol.8 (8), p.5434-5439

Ort / Verlag

England

Erscheinungsjahr

2017

Quelle

Free E-Journal (出版社公開部分のみ）

Beschreibungen/Notizen

• Highly efficient ammonia synthesis at a low temperature is desirable for future energy and material sources. We accomplished efficient electrocatalytic low-temperature ammonia synthesis with the highest yield ever reported. The maximum ammonia synthesis rate was 30 099 μmol g h over a 9.9 wt% Cs/5.0 wt% Ru/SrZrO catalyst, which is a very high rate. Proton hopping on the surface of the heterogeneous catalyst played an important role in the reaction, revealed by IR measurements. Hopping protons activate N even at low temperatures, and they moderate the harsh reaction condition requirements. Application of an electric field to the catalyst resulted in a drastic decrease in the apparent activation energy from 121 kJ mol to 37 kJ mol . N dissociative adsorption is markedly promoted by the application of the electric field, as evidenced by DFT calculations. The process described herein opens the door for small-scale, on-demand ammonia synthesis.