Institute of Fundamental and Frontier Science, University of Electronic Science and Technology of China, Chengdu, 610054, Sichuan, China.
College of Chemistry, Sichuan University, Chengdu, 610064, Sichuan, China.
Adv Mater. 2018 Jul;30(28):e1800191. doi: 10.1002/adma.201800191. Epub 2018 May 28.
The discovery of stable and noble-metal-free catalysts toward efficient electrochemical reduction of nitrogen (N ) to ammonia (NH ) is highly desired and significantly critical for the earth nitrogen cycle. Here, based on the theoretical predictions, MoS is first utilized to catalyze the N reduction reaction (NRR) under room temperature and atmospheric pressure. Electrochemical tests reveal that such catalyst achieves a high Faradaic efficiency (1.17%) and NH yield (8.08 × 10 mol s cm ) at -0.5 V versus reversible hydrogen electrode in 0.1 m Na SO . Even in acidic conditions, where strong hydrogen evolution reaction occurs, MoS is still active for the NRR. This work represents an important addition to the growing family of transition-metal-based catalysts with advanced performance in NRR.
人们非常希望发现稳定且不含贵金属的催化剂，以实现高效电化学还原氮气（N ）为氨气（NH ），这对地球氮循环具有重要意义。在此，基于理论预测，首次采用 MoS 作为催化剂，在室温常压下催化氮气还原反应（NRR）。电化学测试表明，在 0.1 m Na SO 中，该催化剂在-0.5 V 相对于可逆氢电极时，可实现 1.17%的高法拉第效率和 8.08×10 mol s cm 的 NH 生成速率。即使在强析氢反应发生的酸性条件下，MoS 仍可用于 NRR。这项工作代表了具有先进 NRR 性能的过渡金属基催化剂家族的重要补充。
