氨
氨生产
电催化剂
电化学
产量(工程)
法拉第效率
氢
磷化物
硝酸盐
材料科学
无机化学
化学
化学工程
催化作用
电极
有机化学
物理化学
冶金
工程类
作者
Kui Fan,Wenfu Xie,Jinze Li,Yining Sun,Pengcheng Xu,Yang Tang,Zhenhua Li,Mingfei Shao
标识
DOI:10.1038/s41467-022-35664-w
摘要
Electrochemical nitrate reduction to ammonia is a promising alternative strategy to the traditional Haber-Bosch process but suffers from a low Faradaic efficiency and limited ammonia yield due to the sluggish multi-electron/proton-involved steps. Herein, we report a typical hollow cobalt phosphide nanosphere electrocatalyst assembled on a self-supported carbon nanosheet array synthesized with a confinement strategy that exhibits an extremely high ammonia yield rate of 8.47 mmol h-1 cm-2 through nitrate reduction reaction, which is highly superior to previously reported values to our knowledge. In situ experiments and theoretical investigations reveal that the dynamic equilibrium between the generation of active hydrogen on cobalt phosphide and its timely consumption by nitrogen intermediates leads to a superior ammonia yield with a high Faradaic efficiency. This unique insight based on active hydrogen equilibrium provides new opportunities for large-scale ammonia production through electrochemical techniques and can be further used for carbon dioxide capture.
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