化学
法拉第效率
硼
电催化剂
无机化学
氨
选择性
吸附
氨生产
催化作用
材料科学
氮气
化学工程
电化学
电极
有机化学
工程类
物理化学
作者
Laiquan Li,Cheng Tang,Xiaoyang Cui,Yao Zheng,Xuesi Wang,Haolan Xu,Shuai Zhang,Tao Shao,Kenneth Davey,Shi Zhang Qiao
标识
DOI:10.1002/anie.202104394
摘要
Abstract Present one‐step N 2 fixation is impeded by tough activation of the N≡N bond and low selectivity to NH 3 . Here we report fixation of N 2 ‐to‐NH 3 can be decoupled to a two‐step process with one problem effectively solved in each step, including: 1) facile activation of N 2 to NO x − by a non‐thermal plasma technique, and 2) highly selective conversion of NO x − to NH 3 by electrocatalytic reduction. Importantly, this process uses air and water as low‐cost raw materials for scalable ammonia production under ambient conditions. For NO x − reduction to NH 3 , we present a surface boron‐rich core–shell nickel boride electrocatalyst. The surface boron‐rich feature is the key to boosting activity, selectivity, and stability via enhanced NO x − adsorption, and suppression of hydrogen evolution and surface Ni oxidation. A significant ammonia production of 198.3 μmol cm −2 h −1 was achieved, together with nearly 100 % Faradaic efficiency.
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