可扩展的掺铱 NiFe2O4/TiO2 异质结阳极，用于分散式含盐废水处理和 H2 生产。

IF 26.6 1区材料科学 Q1 Engineering Nano-Micro Letters Pub Date : 2024-10-28 DOI:10.1007/s40820-024-01542-x

Sukhwa Hong, Jiseon Kim, Jaebeom Park, Sunmi Im, Michael R. Hoffmann, Kangwoo Cho

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引用次数: 0

摘要

用于分散式废水处理/回用的废水电解槽（WECs）与 H2 生产相结合，可减少与水、废物和能源载体运输相关的碳足迹。本研究报告了掺铒镍铁氧体（NFI，约 5 at% Ir）尖晶石层和 TiO2 覆盖层（NFI/TiO2），作为一种可扩展的异质结阳极，用于在单室电池中直接电解周围 pH 值为中性的废水。在稀释（0.1 M）的氯化钠溶液中，NFI/TiO2 的活性和氯进化反应选择性均优于基准的 IrO2。在接近中性 pH 值的条件下，其稳健的运行也得到了证实。包括操作性 X 射线吸收光谱在内的电分析揭示了 TiO2 的关键作用，它既是 Cl- 化学吸附的主要场所，又是作为欧姆接触的 NFI 的保护层。对含有 NH4+ 的合成废水进行静电电解表明，NFI/二氧化钛不仅实现了 NH4+ 到 N2 的准均一转化，还提高了 H2 的生成效率，同时将溶解氧和活性氯的还原等竞争反应降至最低。使用 NFI/TiO2 的扩大型 WEC 已在电解厕所废水中得到验证。

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Scalable Ir-Doped NiFe2O4/TiO2 Heterojunction Anode for Decentralized Saline Wastewater Treatment and H2 Production

Highlights

Ir-doped NiFe₂O₄ (NFI) spinel with TiO₂ heterojunction overlayer brought about outstanding chlorine evolution reaction in circumneutral pH.
Electroanalyses including operando X-ray absorption spectroscopy uncovered the active role of TiO₂ for Cl⁻ chemisorption.
NFI/TiO₂ anode boosted both NH₄⁺-to-N₂ conversion and H₂ generation in wastewater, and the practical applicability was confirmed with scaled-up anodes and real wastewater.

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来源期刊

Nano-Micro Letters NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

32.60

自引率

4.90%

发文量

981

审稿时长

1.1 months

期刊介绍： Nano-Micro Letters is a peer-reviewed, international, interdisciplinary, and open-access journal published under the SpringerOpen brand. Nano-Micro Letters focuses on the science, experiments, engineering, technologies, and applications of nano- or microscale structures and systems in various fields such as physics, chemistry, biology, material science, and pharmacy.It also explores the expanding interfaces between these fields. Nano-Micro Letters particularly emphasizes the bottom-up approach in the length scale from nano to micro. This approach is crucial for achieving industrial applications in nanotechnology, as it involves the assembly, modification, and control of nanostructures on a microscale.