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Self-powered electrocatalytic ammonia synthesis directly from air as driven by dual triboelectric nanogenerators

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Abstract

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 NOX 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.

Graphical abstract: Self-powered electrocatalytic ammonia synthesis directly from air as driven by dual triboelectric nanogenerators

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Supplementary files

Article information


Submitted
14 Mar 2020
Accepted
19 Jun 2020
First published
22 Jun 2020

Energy Environ. Sci., 2020, Advance Article
Article type
Paper

Self-powered electrocatalytic ammonia synthesis directly from air as driven by dual triboelectric nanogenerators

K. Han, J. Luo, Y. Feng, L. Xu, W. Tang and Z. L. Wang, Energy Environ. Sci., 2020, Advance Article , DOI: 10.1039/D0EE01102A

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