催化作用
铜
法拉第效率
量子产额
氧化还原
材料科学
密度泛函理论
量子点
产量(工程)
氨
化学工程
纳米技术
无机化学
化学
电化学
物理化学
计算化学
物理
有机化学
电极
量子力学
冶金
工程类
荧光
作者
Yonghua Cheng,Xingchuan Li,Peng Shen,Yali Guo,Ke Chu
出处
期刊:Energy & environmental materials
日期:2021-09-04
卷期号:6 (1)
被引量:54
摘要
Electrocatalytic N 2 reduction reaction (NRR) represents an appealing solution for sustainable ammonia production, whereas exploring high‐efficiency NRR catalysts is highly desired but extremely challenging. Herein, we combine Ti 3 C 2 T x ‐MXene quantum dots (MQDs) with porous Cu nanosheets to design a novel heterostructured MQDs/Cu as an effective and durable NRR catalyst. Impressively, MQDs/Cu showed a synergistically enhanced NRR activity with an NH 3 yield of 78.5 μg h −1 mg −1 (−0.5 V) and a Faradaic efficiency of 21.3% (−0.4 V), far superior to pure MQDs and Cu, and outperforming the majority of the state‐of‐the‐art NRR catalysts. Density function theory computations demonstrated that the synergy of MQDs and Cu enabled the creation of interfacial Cu‐Ti dimer as dual‐active‐centers to strongly activate the absorbed N 2 and promote the *N 2 H formation, consequently resulting in the much reduced energy barriers and greatly enhanced NRR performance.
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