催化作用
阴极
法拉第效率
氨
电解质
氧化物
阳极
电化学
材料科学
氨生产
无机化学
化学工程
化学
电极
物理化学
有机化学
工程类
作者
Fukai Wang,Yanan Wang,Linzhe Li,Zi‐Chen Li,Weimin Zhang,Zhiwei Xue,Dong Liu,Xiuxia Meng,Claudia Li,Jaka Sunarso,Shaomin Liu,Naitao Yang
标识
DOI:10.1016/j.ijhydene.2023.01.256
摘要
As the only carbon-free energy carrier without CO2 emission upon decomposition, ammonia is an ideal storage medium for H2. However, the current low efficiency of ammonia synthesis is a main challenge on intermediate-temperature proton-conducting electrochemical cells. Herein, we develop a novel non-precious cathode catalyst consisting of Fe nanoparticles loaded on two-dimensional MXene nanosheets (Fe@MXene) that can achieve a high Faradaic efficiency of 8.4% and an NH3 yield of 8.24 × 10−9 mol. s−1·cm−2 on an anode-supported Ba0·95Ce0·6Tb0·1Y0·2Zr0·1O3-δ-based electrolyte. The resultant catalyst with high specific surface area and catalytic active sites is beneficial to N2 reduction, resulting from the effective activation of N2 molecules imposed by the transported protons. The mechanism of catalytic NRR reveals that Fe@MXene catalyst can increase the electrocatalytic efficiency because of the improvement in the reaction rate constant. These show a promising catalyst of Fe@MXene for N2 reduction reaction using intermediate-temperature proton-conducting solid oxide cell.
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