Repurposed Cu Scrap Featuring CuO/Cu(OH)2 Nanostructures as a High-Performance Anode for OER-Masking Small Molecule Electrooxidation

IF 7.3 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

ACS Sustainable Chemistry & Engineering Pub Date : 2025-05-20 DOI:10.1021/acssuschemeng.5c0097210.1021/acssuschemeng.5c00972

Neha Clare Minj, Balakumaran Kamaraj, Sneha Mittal, Sandeep Yadav, Pracheta Trivedi and Anantharaj Sengeni*,

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Abstract

An efficient and eco-friendly way of recovering and repurposing Cu scrap wires from e-waste has been developed. This involves a simple precleaning followed by a potential-controlled anodization, populating the surface of the recovered Cu scrap wires with dense Cu(OH)₂/CuO nanoneedles. The resultant electrodes were used as an electrocatalytic interface for the oxidation reactions of urea (UOR), methanol (MOR), and glucose (GOR) and compared with their oxygen evolution reaction (OER) performance. Our results show that the moderately OER-active Cu(OH)₂/CuO nanoneedle arrays are efficient in UOR, MOR, and GOR in 1.0 M KOH. The potentials required by this electrode to drive a current density of 10 mA cm^–2 in UOR, MOR, and GOR are 1.499, 1.438, and 1.192 V vs RHE, respectively. When the OER masking ability of Cu(OH)₂/CuO nanoneedle featuring Cu scrap wires was tested, it was found that this catalytic anode required 157 mV (with UOR), 218 mV (with MOR), and 464 mV (with GOR) less than what is needed for OER to deliver 10 mA cm^–2 in 1.0 M KOH. These encouraging findings open new avenues for bettering and improving the recovery, repurposing, and reuse of 9 million metric tons of Cu scraps generated annually.

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利用CuO/Cu(OH)2纳米结构的废铜作为小分子电氧化的高性能阳极

开发了一种高效、环保的从电子垃圾中回收和再利用废铜线的方法。这包括一个简单的预清洁，然后是电位控制阳极氧化，用密集的Cu(OH)2/CuO纳米针填充回收的铜废料线的表面。将所得电极作为尿素（UOR）、甲醇（MOR）和葡萄糖（GOR）氧化反应的电催化界面，并比较了它们的析氧反应（OER）性能。结果表明，在1.0 M KOH条件下，适度过活性的Cu(OH)2/CuO纳米针阵列在UOR、MOR和GOR中都是有效的。该电极在UOR、MOR和GOR中驱动10 mA cm-2电流密度所需的电位分别为1.499、1.438和1.192 V vs RHE。当测试以铜废线为材料的Cu(OH)2/CuO纳米针的OER掩膜能力时，发现该催化阳极在1.0 M KOH下输出10 mA cm-2所需的OER所需的功率分别为157 mV （UOR）、218 mV （MOR）和464 mV （GOR）。这些令人鼓舞的发现为改善和改进每年产生的900万吨铜废料的回收、重新利用和再利用开辟了新的途径。

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来源期刊

ACS Sustainable Chemistry & Engineering CHEMISTRY, MULTIDISCIPLINARY-ENGINEERING, CHEMICAL

CiteScore

13.80

自引率

4.80%

发文量

1470

审稿时长

1.7 months

期刊介绍： ACS Sustainable Chemistry & Engineering is a prestigious weekly peer-reviewed scientific journal published by the American Chemical Society. Dedicated to advancing the principles of green chemistry and green engineering, it covers a wide array of research topics including green chemistry, green engineering, biomass, alternative energy, and life cycle assessment. The journal welcomes submissions in various formats, including Letters, Articles, Features, and Perspectives (Reviews), that address the challenges of sustainability in the chemical enterprise and contribute to the advancement of sustainable practices. Join us in shaping the future of sustainable chemistry and engineering.