Self-powered electrocatalytic ammonia synthesis directly from air as driven by dual triboelectric nanogenerators,Energy & Environmental Science

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Self-powered electrocatalytic ammonia synthesis directly from air as driven by dual triboelectric nanogenerators
Energy & Environmental Science ( IF 32.4 ) Pub Date : 2020-06-22 , DOI: 10.1039/d0ee01102a
Kai Han _{1,

2,

3,

4,

5} , Jianjun Luo _{1,

2,

3,

4,

5} , Yawei Feng _{1,

2,

3,

4,

5} , Liang Xu _{1,

2,

3,

4,

5} , Wei Tang _{1,

2,

3,

4,

5} , Zhong Lin Wang _{1,

2,

3,

4,

5}

Affiliation

Electrocatalytic reduction at room temperature and atmospheric pressure is a promising low-power-consumption and eco-friendly pathway for replacing the traditional ammonia synthesis method, which is one of the largest chemical processes in terms of energy consumption and greenhouse gas emissions. In this work, we utilize triboelectric nanogenerators (TENGs) to construct an electrocatalytic ammonia synthesis system with air as the nitrogen source, which is self-powered, eco-friendly, low-cost, scalable and allows facile fabrication. The nitrogen fixation and electrocatalytic reduction can proceed simultaneously by introducing a high-output dual-TENG configuration. A needle-plate structure was utilized to achieve air discharge and thus obtain NO_X for further aqueous electrolyte formation. In addition, an electrochemical cell with TiO₂ as the catalyst was used to synthesize ammonia. Driven by the simulated waste gas at a flow rate of 3.5 m³ min⁻¹, the ammonia yield per hour of the self-powered electrocatalytic system reached 2.4 μg h⁻¹.

中文翻译：

双摩擦纳米发电机驱动的直接自空气中的自供电电催化氨合成

在室温和大气压下进行电催化还原是一种有希望的低能耗和生态友好的途径，可替代传统的氨合成方法，该方法是就能耗和温室气体排放而言最大的化学工艺之一。在这项工作中，我们利用摩擦电纳米发电机（TENGs）来构建一个以空气为氮源的电催化氨合成系统，该系统是自供电，环保，低成本，可扩展且易于制造的。通过引入高输出的双TENG结构，可以同时进行固氮和电催化还原。利用针板结构实现空气排放，从而获得NO _X用于进一步形成水性电解质。另外，使用以TiO ₂为催化剂的电化学电池合成氨。在模拟废气的驱动下，自供电电催化系统每小时以3.5 m ³ min ^-1的氨产量达到2.4μgh ^-1。

更新日期：2020-08-14

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