电催化剂
催化作用
电解
电化学
法拉第效率
氨
阴极
产量(工程)
无机化学
材料科学
硝酸盐
氧气
化学
电极
物理化学
有机化学
冶金
电解质
作者
Xiaoya Fan,Jie Liang,Longcheng Zhang,Donglin Zhao,Luchao Yue,Yongsong Luo,Qian Liu,Lisi Xie,Na Li,Bo Tang,Qingquan Kong,Xuping Sun
摘要
Abstract Electrochemical nitrate (NO 3 − ) reduction is a green and economic route for ammonia (NH 3 ) synthesis. However, this conversion suffers from low NH 3 selectivity due to strong competition from other NO 3 − reduction pathways. Here, we report that a plasma‐induced defective CoTiO 3 − x nanofiber with oxygen vacancies acts as an efficient electrocatalyst for NO 3 − reduction to NH 3 . In 0.1 M NaOH solution containing 0.1 M NO 3 − , it is capable of achieving a remarkable NH 3 yield of 30.4 mg h –1 mg cat. –1 and a high Faradaic efficiency of 92.6%. The catalyst also shows strong electrochemical stability for a 20‐h electrolysis test. Additionally, a Zn‐NO 3 − battery using CoTiO 3 − x as the cathode catalyst offers a peak power density of 5.04 mW cm −2 and a large NH 3 yield of 3.08 mg h −1 mg cat. −1 . The catalytic mechanism is further discussed by density functional theory calculations.
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