歧化
材料科学
阳极
电解
电解质
硝酸盐
法拉第效率
氨生产
电化学
无机化学
氨
化学工程
电极
催化作用
有机化学
化学
物理化学
工程类
作者
Angjian Wu,Jiabao Lv,Xiaoxu Xuan,Jinhe Zhang,Ang Cao,Mengjie Wang,Xiaoyu Wu,Qian Liu,Yunhao Zhong,Wei Sun,Qiulin Ye,Yaqi Peng,Xiaoqing Lin,Zhifu Qi,Songqiang Zhu,Qunxing Huang,Xiaodong Li,Hao Bin Wu,Jianhua Yan
标识
DOI:10.1002/aenm.202204231
摘要
Abstract Electrocatalytic conversion of waste nitric oxide into ammonia is a promising approach to achieve sustainable nitrogen fixation. Herein, a CoNi co‐oxides catalyst is designed for NH 3 electrosynthesis with the merits of facilitating NO adsorption and reducing the reaction energy barrier. By synergistic coupling with anodic NO oxidation, electrocatalytic disproportionation of NO is first realized to simultaneously synthesize value‐added double nitrogen products (NH 3 and nitrate) with increased total energy efficiency. Furthermore, decoupled acid–base asymmetric electrolyte design is proposed in a united assembled electrolyzer, enabling a high NH 3 production rate (26.27 mg h −1 cm −2 ) with unit faradaic efficiency and a remarkable nitrate production rate of 68.41 mg h −1 cm −2 at the anode. A low cell voltage of 3.58 V is obtained by optimizing ion agglomeration within the membrane to promote the charge‐ion exchange and electrode kinetics. Technoeconomic analysis demonstrates the economic feasibility of recycling waste NO by the electrocatalytic disproportionation strategy.
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