Tuning Morphology and Electronic Structure of Amorphous NiFeB Nanosheets for Enhanced Electrocatalytic N2 Reduction,ACS Applied Energy Materials

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Tuning Morphology and Electronic Structure of Amorphous NiFeB Nanosheets for Enhanced Electrocatalytic N2 Reduction
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2020-10-14 , DOI: 10.1021/acsaem.0c01834
Yan Wang ₁ , Yujing Tian ₂ , Jianfang Zhang _{1,

2} , Cuiping Yu _{1,

3} , Rui Cai _{1,

3} , Jiarui Wang _{1,

3} , Yong Zhang _{1,

4} , Jingjie Wu ₂ , Yucheng Wu _{1,

3,

5}

Affiliation

The electrocatalytic N₂ reduction reaction (NRR) is regarded as a promising alternative to the industrial Haber–Bosch process for NH₃ synthesis at ambient conditions. Here, we report the unique amorphous NiFeB nanosheets for boosting the electrocatalytic NRR kinetics by tuning their morphology and electronic structure through adjusting the Ni/Fe/B ratio. The combined merits of an amorphous nanostructure, an optimized ratio of Ni/Fe/B, and a high boron content in ultrathin Ni_0.50Fe_0.50B nanosheets provide abundant synergistic active sites and facilitate the N₂ adsorption capacity, thus resulting in the enhanced NRR activity with a high NH₃ formation rate of 3.24 μg h^–1 cm^–2 and a Faradaic efficiency of 3.19% at −0.30 V vs reversible hydrogen electrode in 0.1 M KOH aqueous solution.

中文翻译：

用于增强电催化N ₂还原的非晶态NiFeB纳米片的形貌和电子结构

电催化N ₂还原反应（NRR）被认为是工业Haber-Bosch工艺在环境条件下合成NH ₃的有希望的替代方法。在这里，我们报告了独特的非晶态NiFeB纳米片，可通过调节Ni / Fe / B比例来调整其形态和电子结构，从而提高电催化NRR动力学。超薄Ni _0.50 Fe _0.50 B纳米片中非晶态纳米结构，Ni / Fe / B的最佳比例和高硼含量的综合优点提供了丰富的协同活性位点并促进了N ₂吸附能力，从而提高了NRR NH ₃形成速率为3.24μgh ^–1的高活性相对于可逆氢电极在0.1 M KOH水溶液中，在-0.30 V时，cm ^–2和法拉第效率为3.19％。

更新日期：2020-10-26

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