https://scholars.lib.ntu.edu.tw/handle/123456789/637489
Title: | Bimetallic Pd-Sn Catalytic Electrodes from Deep Eutectic Solvents for Selective Nitrate Reduction Toward Nitrogen | Authors: | Kuan, Wei Fan Chen, Ching Lung Ahmad, Muhammad Sheraz Hsieh, Chia Hsun HAO MING CHEN Su, Jenn Fang |
Keywords: | deep eutectic solvents | human health | nitrate reduction | nitrogen | water treatments | Issue Date: | 1-Jan-2023 | Source: | Advanced Sustainable Systems | Abstract: | Nitrate is one of the most widespread water contaminants globally. Nitrate levels in groundwater and surface water can rise to unhealthy levels as a result of nitrogen fertilizer runoff from lawns and farms. This research aims to selectively convert nitrate to gaseous nitrogen using Palladium-Tin (Pd-Sn) bimetallic electrodes electrodeposited on stainless-steel (SS). Inductively coupled plasma optical emission spectrometry, scanning electron microscope, and X-ray diffraction are used to analyze the composition, surface morphology, and crystal structure of the electrodes. The XRD analysis reveals that the Pd-Sn/SS electrode has a crystalline nature when a Pd molar ratio >0.5 while an amorphous phase is detected over a Pd molar ratio (≤0.5). The electrochemical nitrate reduction is carried out in a 0.1 M HClO4 / 8 mM NaNO3 solution for 5 h using electrodes prepared in deep eutectic solvent (DES) system. The Pd0.93Sn0.07/SS electrode shows the best catalytic performance in terms of high nitrate conversion of 97%, N2 selectivity of 88%, and N2 yield of 86% compared to counter electrodes. These findings demonstrate a considerable impact of the electrode preparation process on nitrogen conversion, selectivity, and yield. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/637489 | ISSN: | 2366-7486 | DOI: | 10.1002/adsu.202300425 |
Appears in Collections: | 化學系 |
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